what is the acceleration on a body that approached the arth and comes within 6 earth radii of the earth's surface

Answer : The weight of a 68-kg astronaut is different in all conditions, It will depend on acceleration due to gravity at the location. a) on Earth: The weight of a 68-kg astronaut on Earth would be 68 kg, b) On moon it would be 110 Kg , c) on mars it would be 255 kg and d) On outer space the weight of the astronaut would be zero

As weight is a measure of the force of gravity acting on a body and on Earth, the acceleration due to gravity is 9.8 m/s2, which results in a weight of 68 kg. On the Moon, the acceleration due to gravity is 1.62 m/s2, which results in a weight of 110 kg for a 68-kg astronaut.

On Mars, the acceleration due to gravity is 3.71 m/s2, which results in a weight of 255 kg for a 68-kg astronaut. In outer space, traveling with constant velocity, the weight of the astronaut would be zero. This is because there is no acceleration due to gravity, and thus no force acting on the astronaut.

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The apparent weight of a person with a mass of 78 kg in an elevator accelerating upward at 1.80 m/s2 is 91.2 kg.

This is calculated using the equation: apparent weight = mass x acceleration due to gravity + acceleration of elevator, which equals 78 kg x 9.81 m/s2 + 1.80 m/s2 = 91.2 kg.

Steps:

Therefore, the apparent weight of the person is 767.78 N + 140.4 N = 908.18 N.

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If the cell phone battery starts out with no charge and is charged at a constant rate of 900.0 mA, it will take roughly 5,680 seconds or 94.7 minutes to fully charge.

Electricity consumption for phone chargers is typically 5 watts (W) or less. While some faster chargers can use up to 20 W, the majority of standard chargers are closer to the 5–10 W range. Typically, phone chargers connect to a 120-volt outlet and draw one to two amps.

We can apply the following formula to resolve this issue:

time = (charge / current)

charge = 1.420 Ah x 3,600 C/Ah

= 5,112 C

The charging current is then changed from milliamperes (mA) to amperes (A):

current = 900.0 mA / 1,000 = 0.9 A

We can now enter the values into the formula as follows:

time = (charge / current)

= (5,112 C / 0.9 A)

= 5,680 seconds.

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Answer:

the answer is a number

Explanation:

support me

Answer:

at night unplug EVERYTHING

explanation

when the power is off on a device it still may using a little electricity to recharge the battery inside or keep a clock running, etc. usually there are a lot of things plugged in a home so even if each thing is not using a lot of electricity, ALL the things that plugged in, put together, maybe using A LOT.

The rate at which the plane is moving north is 210 mph.

We can use vector addition to solve this problem. Let's denote the speed of the plane with respect to the ground as V, and the speed of the wind as W. We can break down the speed of the plane into two components: one component due north, denoted as Vn, and one component due east, denoted as Ve. Similarly, we can break down the speed of the wind into two components: one component due north, denoted as Wn, and one component due east, denoted as We.

Since the plane is moving directly towards its destination, we know that the component of its velocity due east, Ve, is zero. Therefore:

V = [tex]\sqrt{(Vn^2 + Ve^2) }[/tex]= Vn

We also know that the speed of the wind due north, Wn, is zero (since the wind is blowing from west to east). Therefore:

W = [tex]\sqrt{(Wn^2 + We^2)}[/tex] = We

Now, we can use vector addition to find the speed of the plane due north. The northward component of the plane's velocity is given by:

Vn = V * cos(theta)

where theta is the angle between the velocity vector and the northward direction. Since the plane is moving due north, theta is 0 degrees. Therefore:

Vn = V * cos(0) = V

The northward component of the wind's velocity is given by:

Wn = W * sin(theta)

where theta is the angle between the velocity vector and the northward direction. Since the wind is blowing from west to east, theta is 90 degrees. Therefore:

Wn = W * sin(90) = W

Now, we can add the northward components of the plane's and the wind's velocities to find the northward component of the resultant velocity:

Vn + Wn = V + W * sin(90)

Simplifying this equation, we get:

Vn = V + Wn = V + W * sin(90) = 210 + 0 * sin(90) = 210 mph

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

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?

The electric motor's efficiency is 51.06%.

The majority of electric motors are made to operate between 50% and 100% of rated load. Typically, maximum efficiency is within 75% of rated load. Hence, the allowable load range for a 10-horsepower (hp) motor is between 5 and 10 hp; its peak efficiency is at 7.5 hp. Below roughly 50% load, a motor's efficiency tends to decline significantly.

To calculate the effort required to raise the object, use the formula:

Work = Force x Distance

= m x g x h (where m is the mass of the object, g is the acceleration due to gravity, and h is the height lifted)

= 34 kg x 9.81 m/s² x 11 m

= 3,769.34 J

The energy consumed by the electric motor is given as 7.4 kJ.

Therefore, the input power is:

Input power = Energy consumed / time taken

= 7.4 kJ / t

Efficiency=(Output power/Input power) x 100%

Output power = Work done/time taken

= 3,769.34 J / t

As a result, the electric motor's efficiency is:

Efficiency=(Output power/Input power)x 100%

= [(3,769.34 J / t) / (7.4 kJ / t)] x 100%

= 51.06%.

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A negative answer for electric force in coulombs law  indicates that the two objects have opposite charges and are attracted to one another which is option A.

Coulomb's Law is a fundamental principle of physics that describes the electrostatic force between electrically charged particles. It states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

The equation for Coulomb's Law is given by F = k * (q1 * q2) / r^2, where F is the force between the charges, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them.

Coulomb's Law states that the magnitude of the electric force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The negative sign in the equation indicates that the force is attractive if the charges are opposite and repulsive if the charges are the same

Therefore, if a student gets a negative answer when solving for electric force, it means that the two objects have opposite charges and are attracted to one another.

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The density of the hypothetical planet, in kg/m3, is 6,246 kg/m3

V = (4/3)πr3

V = (4/3)π(162 x 106 m)3

V = 9.30 x 1018 m3

The density of the planet in kg/m3

We know that Density is given as

D = Mass ÷ Volume

D = 1027 kg ÷ 9.30 x 1018 m3

D = 6,246 kg/m3

Density is a measure of mass per unit of volume. It is expressed in terms of mass per volume and is typically measured in kg/m3 or g/cm3. Density is an important physical property of matter as it allows us to compare the mass of different substances at the same volume.

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The peak voltage across a 500-w device connected to a 120-v ac power source is 120 V. This is because the voltage rating of the device is determined by the voltage of the power source.

To calculate the peak voltage across the device, we can use Ohm's Law:

V = I x R.

This equation states that the voltage is equal to the current multiplied by the resistance.

We know that the voltage of the power source is 120 V and the current is 4 A (I = P/V, where P is the power rating of the device). Therefore, the resistance is 30 ohms (R = V/I).

We can then use Ohm's Law to calculate the peak voltage across the device.

V = I x R
V = 4 A x 30 ohms
V = 120 V

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The speed of the proton can be calculated as:v = p/m = (1.08 × 10⁻¹⁸ kg m/s)/(1.67 × 10⁻²⁷ kg) = 6.46 × 10⁸ m/s. So, the speed of the proton at 10 MeV is 6.46 × 10⁸ m/s.

Relationship between energy in joules versus eV. The relationship between energy in joules and electron volts (eV) is defined by the conversion factor 1 eV = 1.6 × 10⁻¹⁹ joules. This factor is used to convert energy measurements from one unit to the other. If a proton has an energy of 10 MeV, we can use this conversion factor to determine its energy in joules.10 MeV = 10 × 10⁶ eV = 1.6 × 10⁻¹⁹ J/eV × 10 × 10⁶ eV = 1.6 × 10⁻¹³ J. Speed of a proton at 10 MeV.

The speed of a proton at 10 MeV can be calculated using the relativistic equation: E² = (mc²)² + (pc)², where E is the energy of the proton, m is its mass, c is the speed of light, and p is the momentum of the proton. Let's assume that the mass of the proton is 1.67 × 10⁻²⁷ kg. Then, the momentum of the proton can be calculated as follows:p = √(E² - (mc²)²)/c = √((10 × 10⁶ eV)² - (1.67 × 10⁻²⁷ kg × (2.998 × 10⁸ m/s)²)²)/2.998 × 10⁸ m/s = 1.08 × 10⁻¹⁸ kg m/s. The speed of the proton can be calculated as:v = p/m = (1.08 × 10⁻¹⁸ kg m/s)/(1.67 × 10⁻²⁷ kg) = 6.46 × 10⁸ m/s. Therefore, the answer is 10 MeV is 6.46 × 10⁸ m/s.

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The speed of the truck before the collision was 3.2 m/s.

The speed of the truck before the collision can be determined using the principle of conservation of momentum. Momentum is the product of mass and velocity. Therefore, the momentum of the truck-car system before the collision is equal to the momentum of the truck-car system after the collision.
Let us assume the speed of the car before the collision is zero. Then the momentum of the truck-car system before the collision is equal to the momentum of the truck alone. This can be expressed mathematically as:
Mbefore = MtruckVtruck = (6,300kg)(Vtruck)

Mafter = (6,300kg + 1,000kg)(2 m/s)

By equating the two equations, we can solve for V, which gives us a value of 3.2 m/s.

Therefore, the speed of the truck before the collision was 3.2 m/s.

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To explain to Jacob how the number of field lines and the magnitude of the charge are related, Imad should mention that the number of field lines is proportional to the magnitude of the charge.

There is a relationship between the number of field lines and the magnitude of the charge. The magnitude of the charge is directly proportional to the number of field lines that pass through the surface that is perpendicular to the field lines. The number of field lines created by a charge or charges is proportional to the charge or charges' magnitude.

In the absence of any other charges or objects, the field lines emanating from a charge with magnitude q will terminate on another charge with magnitude q of opposite polarity, according to Coulomb's law. Therefore, Jacob should be told that the number of field lines is proportional to the magnitude of the charge, meaning that if the charge's magnitude increases, the number of field lines will increase as well.

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The position space wavefunction for a participle in the ground state of a harmonic oscillator potential is ψ(x) = (mω/πh[tex]{)}^{1/4}[/tex] × exp(-mωx²/2h).

The position space wavefunction for a particle in the ground state of a harmonic oscillator potential is given by:

ψ(x) = (mω/πh[tex]{)}^{1/4}[/tex] × exp(-mωx^2/2h)

where m is the mass of the particle, ω is the angular frequency of the harmonic oscillator potential, ħ is the reduced Planck constant, and x is the position of the particle.

The ground state wavefunction has a Gaussian shape and is centered around the equilibrium position of the oscillator. It is a probability amplitude function that describes the probability of finding the particle at a particular position x. The maximum probability density occurs at x = 0, which is the equilibrium position of the harmonic oscillator.

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The magnitude of the upward acceleration of a load of bricks is 2.77 m/s².

Tension is the pulling force cаrried by flexible mediums like ropes, cаbles аnd string. Tension in а body due to the weight of the hаnging body is the net force аcting on the body.

The tension in the string when the body cаn be given аs,

T = m(a +g)

Here, (m) is the mаss of the body, (а) is the аccelerаtion аnd (g) is the аccelerаtion due to grаvity.

The tension due to the bricks with mаss of 15.2 kg is,

T = 15.2(a + 9.80)

The tension due to the bricks with mass of 27.2 kg is,

T = 27.2(9.80 - a)

Equate both the equation as,

15.2(a + 9.80) = 27.2(9.80 - a)

15.2a + 148.96 = 266.56 - 27.2a

42.4a = 117.6

a = 2.77 m/s²

Thus, the magnitude of the upward acceleration of a load of bricks is 2.77 m/s².

Your question is incomplete, but most probably your full question can be seen in the Attachment.

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The distance between your eye and the image of the butterfly in the mirror is: the same as the distance between your eye and the actual butterfly

The distance between your eye and the image of the butterfly in the mirror is the same as the distance between your eye and the actual butterfly, which is the sum of the distance from your eye to the mirror and the distance from the mirror to the butterfly.

To calculate this, we need to measure the distance from your eye to the mirror, which can be done using a ruler or tape measure, and then measure the distance from the mirror to the butterfly, which can be done using a ruler or tape measure as well. Once we have these two measurements, we can simply add them together to get the total distance between your eye and the image of the butterfly in the mirror.

To clarify further, let's use an example. If your eye is 10 cm away from the mirror and the butterfly is 30 cm away from the mirror, then the total distance between your eye and the image of the butterfly in the mirror is 40 cm. This is because 10 cm (from your eye to the mirror) + 30 cm (from the mirror to the butterfly) = 40 cm.

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A wave crest arrives on the shore a median of every 10. zero seconds, so the frequency is 0. one hundred Hz. The average speed of the waves is 1.five m/s.

We are to decide the common pace of the waves.

Using the formula

v = fλ

Where

v is the speed

f is the frequency

and λ is the wavelength

From the given information

f = 0.1 Hz

λ = 15.0 m

∴ Speed of the wave = 0.1 × 15.0

Speed of the wave = 1.5 m/s

Average speed is defined as the total distance traveled by an object divided by the time taken to cover that distance. It is the measure of the average rate at which an object covers a certain distance in a given amount of time. Mathematically, the average speed is expressed as: Average speed = Total distance traveled / Time taken

It is important to note that average speed is not the same as instantaneous speed, which refers to the speed of an object at a particular instant in time. Average speed takes into consideration the entire adventure, while instant velocity only reflects the velocity at a unmarried moment. The unit of measurement for average speed is meters per second (m/s) or kilometers per hour (km/h), depending on the system of measurement used.

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The fundamental resonance of an open tube that is 35 cm long, when the air temperature is 28°C, is 167.53 Hz.

To calculate this, use the equation f = c/(2L) , where f is the frequency, c is the speed of sound, and L is the length of the tube. Since the speed of sound at 28°C is 331.45 m/s, the frequency can be calculated as f = 331.45/(2*0.35) = 167.53 Hz.

The fundamental resonance of an open tube that is 35 cm long when the air temperature is 28 degrees Celsius is around 297.5 Hz. This can be calculated using the following formula: f = (v x L) / (4 x L) where f is the frequency of the fundamental resonance, v is the speed of sound in air and L is the length of the tube.

The speed of sound in air is approximately 343 m/s, so for an open tube that is 35 cm long the fundamental resonance will be 297.5 Hz. This means that if the tube is excited with a frequency close to 297.5 Hz, the air inside the tube will vibrate in resonance and produce a loud sound.

The frequency of the fundamental resonance will change with changes in the temperature of the air. As the temperature of the air increases, the speed of sound also increases. This means that if the air temperature were higher than 28 degrees Celsius, the fundamental resonance of the tube would also be higher than 297.5 Hz.

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As a percentage of their total volumes, the cores of Uranus and Neptune are smaller than the cores of Saturn and Jupiter.

Uranus, Neptune, Saturn, and Jupiter are all gas giant planets with a layered structure consisting of a core, mantle, and atmosphere. The size of the core relative to the rest of the planet is determined by the planet's formation and evolution history.

Jupiter and Saturn are known to have relatively large cores compared to their overall size, while Uranus and Neptune are believed to have smaller cores.

However, the exact sizes and compositions of the cores of these planets are still a subject of research and debate. As a result, it is difficult to provide a precise comparison of the sizes of the cores of these planets as a percentage of their total volumes.

Based on current knowledge, it is generally accepted that the cores of Uranus and Neptune are smaller than the cores of Saturn and Jupiter as a percentage of their total volumes.

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The vertical speed of a segment of a horizontal taut string through which a sinusoidal, transverse wave is propagating depends on both the wave speed and the amplitude of the transverse wave.

The transverse wave and wave speed for vertical speed of a segment also depends on factors like:

        where 'A' is the amplitude of the transverse wave,

        'ω' is the angular frequency of the wave,

         't' is the time, and

        'cos' is the cosine function.

        where 'T' is the tension in the string and

         'u' is the mass per unit length of the string.

So while the wave speed does not directly determine the vertical speed of a segment of the string, it does affect the angular frequency of the wave (which is related to the wave speed) and thus indirectly affects the vertical speed of a segment of the string through the amplitude of the wave.

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The electric force is the force that exists between two electrically charged objects or particles. The force is either repulsive or attractive depending on whether the objects have the same or opposite charges, respectively. Electric force can be calculated using Coulomb's law.

Alston answered that gravity is a force that is not fundamentally an electric force. This statement is correct because gravity is a fundamental force that acts between two massive objects. It does not depend on electric charges. The force of gravity is always attractive and can be calculated using Newton's law of universal gravitation.

The other fundamental forces in the universe are the strong nuclear force and the weak nuclear force. These forces are responsible for holding the nucleus of an atom together and are not electric in nature.    

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Wavelength, frequency, and speed of wave are related by the following formula:v = fλ

where v is the speed of the wave, f is the frequency of the wave, and λ is the wavelength of the wave.

In terms of the medium through which the wave is passing, the speed of the wave depends on the properties of the medium. The speed of a wave traveling through a medium depends on the medium's elasticity and density. The type of wave, such as sound or light, will also determine the speed of the wave.In terms of wavelength and frequency, they are inversely proportional. This means that if the wavelength increases, the frequency decreases, and if the wavelength decreases, the frequency increases. This is expressed by the formula:f = v/λSo, as the speed of the wave increases, the wavelength increases, and the frequency decreases. Conversely, as the speed of the wave decreases, the wavelength decreases, and the frequency increases.

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Nuclear reactor incidents have been studied in hundreds to determine the stochastic effects on the workers and exposed population.

The stochastic effect refers to radiation-induced effects that may occur in tissues or cells and that are subject to probabilistic relationships between exposure and reaction. The probability of developing cancer increases as a result of exposure to radiation. The greater the exposure dose, the greater the likelihood of developing cancer.The stochastic effect can occur even at low radiation doses.

This is opposed to deterministic effects, which only occur when a particular radiation dose threshold is surpassed. Stochastic effects are also referred to as random or probabilistic effects. They can happen in any tissue or organ in the body, including reproductive cells, which can lead to heritable genetic mutations. The probability of developing cancer increases as the radiation dose rises.

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In statistical mechanics, the partition function (denoted as Q) is a mathematical function that describes the distribution of energy among the possible microstates of a system in thermodynamic equilibrium. The partition function depends on the energy levels and degeneracies of the system, as well as on the temperature and other external parameters.

The Boltzmann factor (denoted as e^(-E/kT)) is a term that appears in the partition function and represents the probability of a system occupying a particular energy level. Here, E is the energy of the level, k is the Boltzmann constant, and T is the temperature of the system in Kelvin. The Boltzmann factor is derived from the Boltzmann distribution, which is a probability distribution that describes the occupation of energy levels in a system.

The Boltzmann factor can be used to estimate the probability of a system occupying a particular energy state by comparing the Boltzmann factors for different states. The ratio of the Boltzmann factors for two energy states gives the relative probability of the system occupying each state. For example, if the ratio of the Boltzmann factors for two energy levels is 10:1, then the system is 10 times more likely to occupy the lower energy level than the higher energy level at that temperature.

Overall, the partition function and the Boltzmann factor are fundamental concepts in statistical mechanics that allow us to describe the distribution of energy among the microstates of a system in thermal equilibrium and estimate the probability of the system occupying specific energy states.

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Answer

time of flight = 0.5533 seconds

horizontal range = 1.107 metres

final velocity is 5.779 m/s at 70° downwards

Step-by-Step Solution

initial horizontal velocity (ux) = 2.0 m/s

initial vertical velocity (uy) = 0

vertical displacement (sy) = -1.5 m

neglecting air friction (drag), acceleration due to gravity (g) in the vertical component, is constant (9.8 m/s²), and horizontal velocity is ALWAYS constant. i.e, acceleration=0. Now using the equations of motion for the x-component:

[tex]s=ut\\v^2=u^2\\v=u[/tex]

for the y-component:

[tex]v=u-gt\\v^2=u^2-2gs\\s=ut-\frac{1}{2}gt^2\\[/tex]

(a) the time the marble will take to reach the floor.

using an equation that we have all the data for,

[tex]s=ut-\frac{1}{2}gt^2[/tex]

-1.5 = 0 - 1/2(9.8)×t². Solving this to get t,

∴ time of flight = 0.5533 seconds

(b) the distance of the table that the marble will land.

similar to the previous question, we can use one of the equations of motion again, but this time, there's only one equation we can use:

[tex]s=ut[/tex]

s = 2×0.5533

∴ horizontal range = 1.107 metres

c. the velocity of the marble just before it reaches the floor.

For this, we require both the x and y components of final velocity, and then we can calculate the resultant vector of the two velocities, as well as the direction/angle. Since u=v in x-component, we already have Vx. To find Vy, we can use:

[tex]v=u-gt[/tex]

v = 0 - 9.8×0.5533

∴ final vertical velocity = -5.4223 m/s

Therefore, final velocity = [tex]\sqrt{Vx^2+Vy^2}[/tex]

v = √(2.0² + (-5.4223)²) = 5.779 m/s

To find direction of velocity, tan∅ = Vy/Vx

∅ = tan⁻¹(5.4223/2.0) = 70°

Therefore, final velocity is 5.779 m/s at 70° downwards

Answer: A - Gold Foil Experiment

Explanation:

Answer:

A

Explanation: Rutherford's gold foil experiment.

When energy waves pass through the valley and reach the mountain, the waves will be reflected back, the material that you can expect to find in valleys are generally soil and rock formations.

The Energy waves are also formed by

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The amount of force that the pitcher applies to the baseball is 11.6N.

Force is a physical quantity that denotes ability to push, pull, twist or accelerate a body. It can be calculated by multiplying the mass of the object by its acceleration as follows;

Force = mass × acceleration

According to this question, a baseball has a mass of 145 g. A pitcher throws the baseball so that it accelerates at a rate of 80 m/s². The force applied on the baseball can be calculated as follows:

Force = 145/1000 kg × 80m/s²

Force = 11.6N

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The normal-mode wavelengths decrease when the air in an organ pipe is replaced by helium, at the same temperature. This is because helium has a lower molar mass than air, and therefore a lower speed of sound, which causes the normal-mode wavelengths to decrease.

The normal-mode wavelengths are determined by the length of the pipe L and the speed of sound in the pipe

V.λn = 2L/nVn is the index of the mode, which can be any integer.

When helium is used instead of air, the speed of sound in the pipe rises because the mass of the helium molecules is smaller than that of the air molecules, so the gas molecules must travel quicker to achieve the same speed. Because the wavelength of a standing wave must fit into the pipe precisely, the increase in velocity causes the wavelength to decrease. The normal-mode wavelengths will be lowered as a result of this.

Thus, the answer is the normal-mode wavelengths decrease.

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