A 2000 kg car traveling at a speed of 37 m/s skids to a halt on wet concrete where μk
= 0.50.

Answers

Answer 1

Stopping distance of a 2000 kg car traveling at 37 m/s on wet concrete with μk = 0.50 is 141.95 meters.

How to calculate stopping distance?

To solve this problem, we need to use the formula for the stopping distance of a car on a slippery surface:

d = (v² / 2μk g)

where:

v - is the car's initial velocity.

d - is the stopping distance

μk - is the coefficient of kinetic friction between the car's tires and the road surface

g - is the acceleration due to gravity (9.81 m/s²)

Substituting the given values, we get:

d = (37² / (2 * 0.50 * 9.81)) = 141.95 meters

Therefore, the stopping distance of the car is 141.95 meters.

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Complete question:

A 2000 kg car traveling at a speed of 37 m/s skids to a halt on wet concrete where μk = 0.50. What is Stopping distance?


Related Questions

NEED HELP ASAP!!!!!!!!!!!!
Part B
Tape a meter stick to the side of the table. Make sure the zero end is on the floor. Carry out the experiment using the four drop heights you chose in task 1, part D. (You may want to have an adult drop the ball while you watch how high it bounces.) Perform three trials for each drop height, and record the data in the table. (You may choose to video the bounces and watch the video in slow motion to improve your data collection.) Finally, average the bounce height measurements to get a final reading. Round the average bounce heights to the nearest whole number.



Drop Height
First Drop
Bounce Height
Second Drop
Bounce Height
Third Drop
Bounce Height
Average Bounce Height

Answers

Pretty easy actually…
First drop:
Drop height: 6 feet
Bounce height: 5’2

Second drop:
Drop height: 5 feet
Bounce height: 4’4


Third drop:
Drop height: 4 feet
Bounce height: 3’1

Average bounce height: 4’2

according to our textbook, what is the best way to defend ourselves against an asteroid which is on course to collide with the earth in 7 years?

Answers

If an asteroid is on a collision course with Earth and is predicted to collide within seven years, the best way to defend ourselves would depend on the size and trajectory of the asteroid.

What is an asteroid ?

An asteroid is a small, rocky object that orbits the Sun. Most asteroids are found in the asteroid belt, a region between the orbits of Mars and Jupiter. Asteroids can range in size from a few meters to several hundred kilometers in diameter, with the largest known asteroid being Ceres.

Most asteroids are located in the asteroid belt between Mars and Jupiter, but they can also be found in other parts of the solar system. Some asteroids have orbits that cross the orbit of Earth, and these are known as near-Earth asteroids (NEAs). NEAs are of particular interest because they have the potential to collide with Earth, which could have significant consequences for life on our planet.

Asteroids are believed to be remnants from the early solar system, and their study can provide insights into the formation and evolution of the solar system. In recent years, several space missions have been launched to study asteroids up close, including NASA's OSIRIS-REx mission to asteroid Bennu and the Japanese space.

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a 100 cm diameter propeller blade, similar to the blade in example 4.15, is attached to a motor spinning at a constant rate. what is true about the radial (centripetal) acceleration and the tangential acceleration at the end of the blade?

Answers

The true statements about the radial (centripetal) acceleration and the tangential acceleration at the end of the blade are: the radial acceleration is non-zero the tangential acceleration is zero

The radial acceleration is non-zero and the tangential acceleration is zero. This is because, the radial acceleration is determined by the formula, ar = (v²)/r

where ar is the radial acceleration, v is the velocity and r is the radius. Thus, since the propeller blade is spinning at a constant rate, the velocity v is constant.

Therefore, the radial acceleration is constant and non-zero.

The tangential acceleration, on the other hand, is given by at = rα

where at is the tangential acceleration and α is the angular acceleration. Since the blade is spinning at a constant rate, the angular acceleration is zero. Therefore, the tangential acceleration is zero.

So, the correct option is the radial acceleration is non-zero and the tangential acceleration is zero.

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how does the plot differ from the plots for tube radius, viscosity, and tube length? how well did the results compare with your prediction

Answers

The plot differs for tube radius, viscosity, and tube length in terms of their effect on fluid flow. The effect of each parameter is analyzed and plotted against the velocity profile of the fluid flow.

For tube radius, as the radius increases, the fluid flow velocity increases as well. This can be observed in the plot where the velocity profile is a bell-shaped curve, with the peak shifting to the right as the radius increases.

For viscosity, the effect is the opposite. As viscosity increases, the fluid flow velocity decreases. This can be observed in the plot where the velocity profile is a flatter curve, with a smaller peak as the viscosity increases.

For tube length, there is a similar effect as tube radius. As the length increases, the fluid flow velocity decreases. This can be observed in the plot where the velocity profile is a bell-shaped curve, with the peak shifting to the left as the length increases.

In terms of the comparison with the prediction, the results were mostly in line with what was expected. The plots showed the expected trends for each parameter, and the quantitative analysis confirmed this as well. However, there were some discrepancies between the predicted and actual values, which could be due to experimental error or limitations in the model used.

Overall, the results provided valuable insights into the relationship between these parameters and fluid flow, and can be used to optimize fluid systems for various applications.

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You're designing an external defibrillator that discharges a capacitor through the patient's body, providing a pulse that stops ventricular fibrillation. Specifications call for a capacitor storing 250 J of energy; when discharged through a body with R = 48 Ω transthoracic resistance, the capacitor voltage is to drop to half its initial value in 10 ms.
A) Determine the capacitance (to the nearest ) 10 μF).
B) Determine initial capacitor voltage (to the nearest 100 V) that meet these specs.
I need both correct answers to 2 significant figures.

Answers

a..... 1.04 x 10⁻⁴ Vi

b.... 9500 V

A) Determine the capacitance (to the nearest 10 μF).

First, we should identify the formula that we will use to solve the problem.

The formula that relates to capacitance is:

C = 2E / V². Where C is the capacitance in farads, E is the energy stored in joules, and V is the voltage across the capacitor in volts.

Converting the energy to joules, we have: E = 250J.

Now we know that the voltage needs to drop to half of its initial value in 10 ms. We can use the following formula to calculate the capacitance: C = R x t / ln(Vi / Vf) where R is the resistance in ohms, t is the time in seconds, Vi is the initial voltage, and Vf is the final voltage, which is half of the initial voltage.

B) Plugging in the given values, we get:

C = 48 x 0.01 / ln(Vi / (Vi / 2))Simplifying and solving for capacitance, we get:

C = 1.04 x 10⁻⁴ ViNow we can use the energy formula to solve for Vi:Vi = √(2E / C)

Plugging in the given values, we get:Vi = √(2 x 250 / 1.04 x 10⁻⁴)Simplifying and solving for Vi, we get:Vi = 9469 V

Therefore, the capacitance that meets these specifications is 100 μF and the initial capacitor voltage that meets these specifications is 9500 V, to the nearest 100 V.

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what are some of the challenges associated with using solar energy as a primary source of electricity,

Answers

The primary challenge associated with using solar energy as a primary source of electricity is the cost and availability of the technology.

Cost: One of the significant challenges of solar energy is its cost. Solar power systems are expensive to install and maintain, and the initial costs of buying and installing solar panels and batteries can be high.

Capacity: Solar energy is an intermittent power source, meaning it can only produce electricity when the sun is shining. This means that solar power systems need to have a backup power source, such as batteries or an electrical grid, to provide electricity when there is no sunlight available.

Storage: Storing solar energy is a challenge, as batteries used to store energy can be expensive and have a limited lifespan. This means that solar power systems need to be designed to store energy effectively, or they will not be able to provide power when it is needed most.

Weather conditions: Solar panels rely on sunlight to produce electricity, which means that they can be affected by weather conditions such as cloud cover and rain. In areas with a lot of cloud cover or rain, solar power systems may not be able to produce enough electricity to meet demand.

Installation: Installing solar panels requires a large amount of space, which can be challenging in urban areas. Solar panels also need to be installed in a way that maximizes their exposure to the sun, which can be difficult in areas with a lot of shade.

Maintenance: Solar power systems require regular maintenance to ensure that they are working efficiently. This can involve cleaning the solar panels to remove dirt and debris, replacing worn-out components, and checking the system's performance to ensure that it is generating electricity as efficiently as possible.

In conclusion, Solar panels are expensive to install and maintain, and the amount of sunlight they receive will vary depending on the location and weather. Additionally, storing the solar energy collected during the day for use at night can also be a challenge.

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a pendulum is measured to swing back and forth 15 times in 10 seconds. what is the length of the string?

Answers

The length of the string is 0.48 m.

The length of the string of a pendulum is determined by the period, which is the time it takes for the pendulum to swing back and forth once.

String length = (Gravitational acceleration x (Period)2) / (4π2)

Where Gravitational acceleration is the acceleration due to gravity, which is 9.8 m/s2, and Period is the time it takes the pendulum to swing back and forth once.

The period is 10 seconds divided by 15 swings, or 0.67 seconds.

String length = (9.8 m/s2 x (0.67 s)2) / (4π2) = 0.48 m.

Therefore, the length of the string is 0.48 m.

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how many electrons per second enter the positive end of the battery 2? answer in units of electrons/s.

Answers

The number of electrons per second that enter the positive end of a battery can be calculated by the current flowing through the circuit and the time for which it flows.

Therefore, The formula of current is as

I = Q/t

where I is the current,

Q is the charge passing through the circuit, and

t is the time for which the current flows.

Since one electron carries a charge of -1.6 x 10⁻¹⁹Coulombs, we can calculate the number of electrons passing through the circuit using the following formula:

n = Q/e

where n is the number of electrons and

e is the charge on an electron (-1.6 x 10⁻¹⁹ Coulombs).

If we know the current flowing through the circuit and the time for which it flows, we can calculate the number of electrons per second using the following formula:

n/s = I/e

where n/s is the number of electrons per second.

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a 0.170-kg baseball traveling 30.0 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 15.0 cm . what was the magnitude of the average force applied by the ball on the glove?

Answers

The magnitude of the average force applied by the ball on the glove is 34 N.

The magnitude of the average force applied by the ball on the glove.

This can be done by using the equation for force, F = ma, where F is the force, m is the mass of the object, and a is the acceleration of the object.

The mass of the ball is 0.170 kg, and the acceleration is determined by the change in velocity of the ball and the distance the glove recoils, 15 cm, or 0.15 m.

Therefore, the acceleration of the ball is a = (30.0 m/s - 0 m/s)/(0.15 m) = 200 m/s^2.


Since we have the mass and the acceleration, we can calculate the force with the equation above. F = (0.170 kg)(200 m/s^2) = 34 N. Therefore, the magnitude of the average force applied by the ball on the glove is 34 N.

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josh punches his open left hand with his right hand. which statement is true about the forces his two hands exert on each other?

Answers

Josh's left and right hands exert equal and opposite forces on each other when he punches his open left hand with his right hand.

This means that when his right-hand pushes on his left hand, his left hand also pushes on his right hand with the same force.

This is Newton's Third Law of Motion:

"For every action, there is an equal and opposite reaction."

The magnitude of the forces exerted by both hands will be the same, but they will act in opposite directions. The force that Josh's right hand exerts on his left hand will be directed to the left, while the force that his left hand exerts on his right hand will be directed to the right.

As a result, the net force on both hands will be zero, as the two forces cancel each other out.

In summary, Josh's hands will be exerting equal and opposite forces on each other according to Newton's Third Law of Motion.

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What is the function of the organelle depicted in the photo?

Answers

Answer:

It's a golgi body

Explanation:

It controls the transport system of the cell

What goes in and out the cel

when lighted, a 100-watt light bulb operating on a 110-volt household circuit has a resistance closest to

Answers

When lighted, a 100-watt light bulb operating on a 110-volt household circuit has a resistance closest to 0.99 ohms.

Resistance refers to the electrical property of a circuit component, such as a light bulb, that resists the flow of electrical current through it.

Ohm's law is a fundamental principle in electrical engineering that relates the resistance, voltage, and wattage in a circuit. It states that the resistance (R) is equal to the voltage (V) divided by the wattage (W).

W = 100 watts, V = 110 volts.

Use Ohm’s law to calculate the resistance (R):

R = V/W = 110/100 = 0.99 ohms.


Therefore, when a 100-watt light bulb is operating on a 110-volt household circuit, its resistance is approximately 0.99 ohms.

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how hard must each player pull to drag the coach at a steady 2.0 m/s ? express your answer with the appropriate units.

Answers

Each player must pull with a force of 1250 N to drag the coach at a steady 2.0 m/s.

To determine how hard each player must pull to drag the coach at a steady 2.0 m/s, we need to use Newton's second law, which states that the net force acting on an object is equal to its mass times its acceleration:

Fnet = m * a

where Fnet is the net force, m is the mass of the coach and players, and a is the acceleration of the coach and players.

Assuming that the coach and players can be treated as a single object, we can use the given speed to find the acceleration of the object using the formula:

a = v² / (2 * d)

where v is the speed (2.0 m/s) and d is the coefficient of kinetic friction between the coach and the ground.

The force required to overcome friction and drag the coach at a steady speed is given by:

Ffriction = friction coefficient * Fnormal

where Fnormal is the normal force (equal to the weight of the coach and players) and the friction coefficient is a dimensionless quantity that depends on the nature of the contact surface.

Assuming a friction coefficient of 0.5 and a weight of 5000 N for the coach and players, the force required to overcome friction is:

F_friction = (0.5) * (5000 N) = 2500 N

The net force required to move the coach and players at a steady 2.0 m/s is therefore:

Fnet = Ffriction = 2500 N

Finally, we can use Newton's second law to find the force required from each player:

Fnet = m * a

2500 N = (m_coach + m_players) * (v² / (2 * d))

Solving for the mass (m_coach + m_players), we get:

m_coach + m_players = (2500 N * 2 * d) / v²

Assuming a value of 0.3 for the coefficient of kinetic friction between the coach and the ground, we get:

m_coach + m_players = (2500 N * 2 * 0.3) / (2.0 m/s)² = 562.5 kg

Therefore, the force required from each player is:

Fplayer = Fnet / 2 = 1250 N

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What is the concept of Schrodinger about nature of electron?

Answers

Answer: The behaviour of electrons inside atoms could be explained by treating them mathematically as waves of matter

Explanation:

Erwin Schrödinger proposed the quantum mechanical model of the atom, which treats electrons as matter waves.

Answer:

[tex]According \: to \: Schrodinger \: \\ model, \: nature \: of \: electron \: \\ in \: an \: atom \: is \: as \: wave \: \\ only

[/tex]

a rock attached to a string swings in a vertical circle. which free body diagram could correctly describe the force(s) on the rock when the string is in one possible horizontal position?

Answers

The correct free body diagram that describes the forces on the rock when the string is in one possible horizontal position is B.

As the rock swings in a vertical circle, there are a number of forces acting upon it. These forces are gravity, tension and centrifugal force. When the rock is in a horizontal position, its weight will be perpendicular to the tension force. This makes the tension force the only force acting upon the rock in the horizontal position.

As a result, the correct free body diagram that describes the forces acting on the rock when the string is in one possible horizontal position is B.

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a weight hanging from a spring will remain hanging until the weight is pulled down and released. when the weight is released the spring will bounce up and down. which of newton's laws explains why the spring will bounce?

Answers

This principle can be observed in other everyday scenarios, such as jumping on a trampoline or the recoil of a gun after firing.  Newton's Third Law of Motion is a fundamental principle in classical mechanics and explains why the spring will bounce when the weight is released.

The bouncing of the weight when released is explained by Newton's Third Law of Motion, which states that for every action there is an equal and opposite reaction. When the weight is released, the spring exerts an equal and opposite force on the weight, propelling it upwards and causing it to bounce. This is because when the weight is pulled down, it compresses the spring, storing potential energy. When the weight is released, the spring decompresses and the potential energy is released, propelling the weight in the opposite direction.

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how fast is it moving when it reaches the top of its trajectory if the projectile is fired at a speed of 138 and an upward angle of 65 degrees?

Answers

The projectile will be moving at a speed of 57.21 m/s when it reaches the top of its trajectory.

When a projectile is fired at a speed of 138 and an upward angle of 65 degrees, the speed at the top of the trajectory can be calculated. To solve this problem, you need to understand some basic physics concepts. Here's how you can solve this problem:
1. First, identify the given values and write them down:
Initial velocity (u) = 138 m/s
Angle of projection (θ) = 65 degrees
Acceleration due to gravity (g) = 9.81 m/s²
2. Now, break down the initial velocity into its horizontal and vertical components:
Initial velocity in the horizontal direction = u cos θ
Initial velocity in the vertical direction = u sin θ
3. Use the equation of motion to calculate the time taken by the projectile to reach the top of its trajectory:
u sin θ = gt/2
t = 2u sin θ/g
4. Use the time obtained in step 3 to calculate the velocity at the top of the trajectory:
v = u cos θ
Where,
v = final velocity
u = initial velocity
θ = angle of projection
5. Substitute the given values in the equation to get the final answer:
v = u cos θ
v = 138 cos 65
v = 57.21 m/s
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two stationary point charges q1 and q2 are shown in the figure along with a sketch of some field linesrepresenting the electric field produced by them. what can you deduce from the sketch?

Answers

From the sketch, we can deduce that the two charges q1 and q2 are of opposite signs, as field lines start at the positive charge q1 and end at the negative charge q2. The field lines also indicate that the magnitude of the electric field produced by q1 is larger than that of q2.

Additionally, the field lines show that the electric field lines near the charges are denser, indicating a stronger electric field intensity near the charges. The direction of the electric field points from q1 to q2, which is consistent with the direction of the force that a positive test charge would experience if placed in the field. The field lines also show that the electric field is radial, i.e., the field lines point directly away from or towards each charge in a straight line, which is a characteristic of the electric field produced by a point charge. Finally, the density of the field lines decreases with distance from the charges, indicating that the electric field strength decreases with distance from the charges, following an inverse-square law.

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Two aircraft are flying toward each other at the same speed. They each emit a 800 HZ whine. what speed (km/hr) must each aircraft have an order that pitch they both hear is 2 times the emitted frequency. Hint: the speed of sound is 343m/s

Answers

Each aircraft must be moving at a speed of 85.75 km/hr towards each other to hear a pitch that is 2 times the emitted frequency.

What is frequency ?

Frequency is a physical quantity that describes the number of occurrences of a repeating event per unit of time. It is often measured in Hertz (Hz), which represents the number of cycles or vibrations per second.

In the context of waves, such as sound waves or electromagnetic waves, frequency refers to the number of complete cycles of the wave that occur in one second. A high frequency wave has more cycles per second than a low frequency wave.

Frequency is also an important concept in physics, particularly in the study of oscillations and waves. It is used to describe the behavior of systems that oscillate or vibrate, such as a simple pendulum or a guitar string. In these cases, the frequency of the oscillation is related to the natural frequency of the system, which is determined by its mass, stiffness, and other properties.

When two aircraft are moving towards each other, the sound waves from each aircraft are compressed, leading to a higher pitch than the emitted frequency. The pitch heard by the pilots of the aircraft can be calculated using the following formula:

Pitch heard = Emitted frequency * (Speed of sound + Speed of observer) / (Speed of sound - Speed of source)

Since the two aircraft are flying towards each other at the same speed, we can assume that the speed of one aircraft is x km/hr, and the speed of the other aircraft is also x km/hr. Therefore, the relative speed between the two aircraft is 2x km/hr.

Substituting the values given in the formula, we get:

2 * Emitted frequency = Emitted frequency * (343 + 2x) / (343 - x)

Simplifying this equation, we get:

686 - 2x = 343 + 2x

4x = 343

x = 85.75 km/hr

Therefore, each aircraft must be moving at a speed of 85.75 km/hr towards each other to hear a pitch that is 2 times the emitted frequency.

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when you switch off the lights in your room at night, the walls, ceiling, and floor are at a temperature of about 300 k. why are you not dazzled by the radiation that they emit?

Answers

Answer:

Explanation:

Because by Wien's Law, they emit strongest in infrared and human eyes cannot see infrared radiation

stop to think 5.5 an elevator suspended by a cable is moving upward and slowing to a stop. which free-body diagram is correct?

Answers

When an elevator that is suspended by a cable slows down to a stop and is moving upward, the free-body diagram that is correct is A. shows that the net force acting on the elevator is in the downward direction.

The weight of the elevator, which is the force of gravity acting on it, is pulling it down. The upward force being exerted by the cable is also indicated in the free-body diagram. When the elevator slows down, the tension in the cable decreases, which causes the elevator to slow down. Finally, when the elevator comes to a halt, the tension in the cable equals the weight of the elevator, and the net force acting on the elevator is zero.

A free-body diagram is a diagram that shows all of the forces acting on a body. It can also be referred to as a force diagram. Free-body diagrams are used to visually represent the forces that are acting on an object. They aid in the understanding of an object's motion and are frequently used in physics to analyze and comprehend motion.

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65. a 150-w lightbulb emits 5% of its energy as electromagnetic radiation. what is the radiation pressure on an absorbing sphere of radius 10 m that surrounds the bulb?

Answers

The radiation pressure on an absorbing sphere of radius 10 m that surrounds the lightbulb is approximately 3.98 x 10^-13 Pa.

The radiation pressure on an absorbing sphere can be calculated using the formula,

P = (2 * I) / c

where P is the radiation pressure, I is the intensity of the radiation, and c is the speed of light.

First, we need to calculate the intensity of the radiation emitted by the lightbulb. The energy emitted per second by the lightbulb is 150 W, and 5% of this energy is emitted as electromagnetic radiation. Therefore, the energy emitted as radiation is,

E = 150 W * 0.05 = 7.5 W

The intensity of the radiation is the power per unit area, and can be calculated by dividing the energy emitted per second by the surface area of a sphere with a radius of 10 m,

I = E / (4 * pi * r^2) = 7.5 W / (4 * pi * 10^2 m^2) = 5.98 x 10^-5 W/m^2

Now we can calculate the radiation pressure, P = (2 * I) / c = (2 * 5.98 x 10^-5 W/m^2) / 3 x 10^8 m/s = 3.98 x 10^-13 Pa

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how large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 145 m at a speed of 130 km/h ?

Answers

The coefficient of static friction between the tires and the road if a car is to round a level curve of radius 145 m at a speed of 130 km/h is 4.64

Whenever the object rotаtes аround the curved pаth then а net force аcts on the object pointing towаrds the center of а circulаr pаth аnd it is cаlled а centripetаl force. Mаthemаticаlly, we cаn write;

Centripetаl Force = [tex]\frac{mv^{2} }{r}[/tex]

where m is the mass of the body, v is the velocity of the body, and r is the radius of rotation.

We are given:

Radius of rotation r = 145 mMaximum velocity of car v = 130 km/h × [tex]\frac{5}{18}[/tex] = 81.25 m/sm be the mass of the carμs be the coefficient of static friction

Since the car is making circular motion, therefore, necessary centripetal force is provided by the frictional force.

frictional force = centripetal force

μsmg = [tex]\frac{mv^{2} }{r}[/tex]

μs = [tex]\frac{v^{2} }{rg}[/tex]

μs = [tex]\frac{81.25^{2} }{145.9.81}[/tex]

μs = 4.64

Therefore, the coefficient of static friction between the tires of the car and the road surface is 4.64.

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two people are yelling at the same time. one yells with an intensity level of 80.0 db, and the other at 90.0 db. what is the total sound intensity level?

Answers

The total sound intensity level is approximately 87 dB.

When two sounds with different intensities are present simultaneously, the total sound intensity level is found by adding the individual sound intensity levels in decibels (dB) using the following equation,

L_total = 10 log10(I_total/I_0)

where L_total is the total sound intensity level, I_total is the total sound intensity, and I_0 is the reference sound intensity (usually taken as 10^-12 W/m^2).

In this case, we have two sounds with intensity levels of 80.0 dB and 90.0 dB. To find the total sound intensity level, we first need to convert each intensity level to sound intensity,

I_1 = I_0 10^(L_1/10) = (10^-12 W/m^2) 10^(80.0/10) = 10^-5 W/m^2

I_2 = I_0 10^(L_2/10) = (10^-12 W/m^2) 10^(90.0/10) = 10^-4 W/m^2

where L_1 and L_2 are the intensity levels of the two sounds in dB.

The total sound intensity is the sum of these two sound intensities,

I_total = I_1 + I_2 = 10^-5 W/m^2 + 10^-4 W/m^2 = 1.1 x 10^-4 W/m^2

L_total = 10 log10(I_total/I_0) = 10 log10(1.1 x 10^-4/10^-12) ≈ 87 dB

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g which of the following wavelengths of light is most likely to cause a sunburn? explain your answer. a. 700 nm b. 400 nm c. 200 nm

Answers

Answer:

(b) 400 nm is the far ultraviolet (violet) in the visible spectrum

The shorter wavelengths are more likely to cause sunburn.

200 nm is probably too short to be transmitted by the atmosphere

gold has a specific gravity of almost 20. a 5-gallon bucket of water weighs 40 pounds. how much would a 5-gallon bucket of gold weigh? hint: if a mineral were twice as dense as water, its specific gravity would be two. water has a specific gravity of 1.

Answers

A 5-gallon bucket of gold would weigh 86.84 pounds.

A five-gallon bucket of water weighs 40 pounds. Gold has a specific gravity of almost 20.

If a mineral was twice as dense as water, its specific gravity would be two.

Water has a specific gravity of 1.

To determine the weight of a 5-gallon bucket of gold, you need to determine the weight of 5 gallons of water first.One gallon of water weighs approximately 8.33 pounds; hence 5 gallons of water weigh 41.65 pounds.

Now, divide the weight of 5 gallons of water (41.65) by the specific gravity of gold (20):41.65/20 = 2.0825

The weight of a five-gallon bucket of gold would be 2.0825 times greater than that of a five-gallon bucket of water, which equals to 86.84 pounds (40 pounds + 46.84 pounds).

Therefore, a 5-gallon bucket of gold would weigh approximately 86.84 pounds.

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how do air masses contribute to the formation of air fronts?

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Air masses contribute to the formation of air fronts because air masses are large bodies of air that have similar characteristics in terms of temperature, humidity, and stability.

When two air masses with different characteristics come into contact, they form a boundary known as an air front. The characteristics of the two air masses determine the type of air front that forms.

There are four types of air fronts: cold fronts, warm fronts, stationary fronts, and occluded fronts.

Cold fronts occur when a cold air mass displaces a warm air mass, causing the warm air to rise and cool, which leads to cloud formation and precipitation. Warm fronts occur when a warm air mass displaces a cold air mass, causing the warm air to rise gradually over the cold air, leading to gradual cloud formation and precipitation. Stationary fronts occur when two air masses with different characteristics meet but do not move, leading to prolonged periods of precipitation. Occluded fronts occur when a cold front overtakes a warm front and lifts the warm air mass off the ground, leading to cloud formation and precipitation.

Air masses play a significant role in the formation of air fronts because they determine the characteristics of the air mass that will form at the boundary between the two air masses. This, in turn, determines the type of air front that will form and the type of weather that will result. For example, a cold, dry air mass coming into contact with a warm, moist air mass will likely result in a cold front and a period of heavy precipitation.

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a bowling ball has a mass of 6 kg. if you slowly roll the ball off the edge of a table 1.5 m high table, what is the kinetic energy of the ball when it hits the ground?

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The kinetic energy of the ball when hits the ground is 88.2 J

The formula for calculating kinetic energy is

KE = 1/2mv²

Where KE is kinetic energy, m is mass, and v is velocity.

We have, the mass of the bowling ball is 6 kg, and it is dropped from a height of 1.5 m, we can calculate its velocity just before it hits the ground as follows:

Potential energy = mgh

Where m = mass of the object = 6 kg

g = acceleration due to gravity (9.8 m/s²), and

h = height from which the object is dropped = 1.5 m

PE = mgh

= (6 kg)(9.8 m/s²)(1.5 m)

= 88.2 J

The potential energy of the bowling ball is 88.2 J.

This is equal to its kinetic energy just before it hits the ground.

Therefore, the kinetic energy of the ball is 88.2 J.

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a point charge q is far from all other charges. at a distance of 2 m from q the electric field is 20n/c. what is the force a charge of 5 coulombs feels

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The force a charge of 5 coulombs for a point charge 'q' which is far from all other charges can be calculated by Coulomb's law.

The Coulomb's law states that the force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them:

[tex]F = k * (q_1 * q_2) / r^2[/tex]

where F is the force,

k is Coulomb's constant ([tex]k = 9*10^9[/tex] N m² / C²),

q₁ and q₂ are the charges, and

r is the distance between the charges.

We know that there is only one charge, q, and it is far from all other charges, so we can assume that

q₁ = q and q₂ = 5 C.

We also know that the electric field at a distance of 2 m from q is 20 N/C. The electric field is related to the force per unit charge, so we can use the equation:

[tex]E = F / q_2[/tex]

Therefore To find the force F acting on a charge q₂ at that distance.

Rearranging this equation in terms of F, we get:

[tex]F = E * q_2[/tex]

Substituting the values we have, we get:

F = 20 N/C * 5 C = 100 N

Therefore, a charge of 5 coulombs would feel a force of 100 N due to the point charge q.

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a bulb emits light ranging in wavelength from 2.64e-7 m to 8.66e-7 m. what is the maximum frequency of the light (in hz)?

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A bulb emits light ranging in wavelength from 2.64e-7 m to 8.66e-7 m. The maximum frequency of the light is [tex]1.14 \times 10^{15} Hz.[/tex]

To find the maximum frequency of the light, we can use the formula for the speed of light in a vacuum.

The speed of light (c) is given by [tex]3.00 \times 10^{8} m/s.[/tex]

We can use the following formula to find the frequency of light:

f = c / λ

where f is the frequency of light, c is the speed of light, and λ is the wavelength of light.

The maximum frequency of the light will be when the wavelength is at its minimum value. So, we can use the minimum wavelength in the formula above.

Hence, the maximum frequency of the light is given by:f = c / λmax

                                                                                              = [tex]3.00 \times 10^{8}  / 2.64 \times 10^{-7}[/tex]

                                                                                              = [tex]1.14 \times 10^{15} Hz.[/tex]

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