alena is performing a floor routine. in a tumbling run she spins through the air, increasing her angular velocity from 43.00 to6 5.00 rev/s while rotating through one-half of a revolution. how much time does this maneuver take?

Answer: 4m/2

Explanation: If you divide 48N and 12N, you will get 4m/s

To determine the coefficient of lift of an aircraft in sluf, we must also know the angle of attack.

What is aircraft?
A vehicle that can fly by gaining support from of the air is called an aircraft. It uses either static lift, dynamic lift from an airfoil, or, in a few rare instances, the downward thrust from jet engines to counteract the force of gravity. Aeroplanes, helicopters, airships (including blimps), gliders, paramotors, as well as hot air balloons are a few examples of common types of aircraft. Aviation refers to the human activity which surrounds aircraft. Aeronautics is the study of aviation, which includes creating and building aircraft. Unmanned aerial vehicles may well be remotely controlled as well as self-controlled by onboard computers, unlike crewed aircraft that have an onboard pilot. Different factors, including lift type, aircraft propellant, usage, and others, can be used to categorise aircraft.

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Given,

On simplifying,

Thus,

Or

Thus, x=9 and x=-15

Therefore the correct answer is the third option

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"What Is It and What Are Some Differences Between High and Low Specific Heat Capacity?"

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Hello! Today, let's begin with discussing what specific heat capacity is.

"What is Specific Heat Capacity?"

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"What is High and Low Specific Heat Capacity?"

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Hopefully this sort of helps you have a better understanding of what specific heat is, as well as the differences between that of high and low specific heat capacity. Also, if this is a write your answer response, it is better to dive further into your studies and notes regarding this topic so you can properly answer the question and follow the guidelines. Anyways, I wish you the best of luck on your assignment. Thanks for reading!

A 100 n box is at rest on a tabletop where the coefficients of friction are 0.4 static and 0.3 kinetic.  static  force of friction will be present if you push on it horizontally westward with 35 N.

W = 100N - Ms = 0.4 Mi = 0.3

F = 35N

F = W = 100N

Now, limiting friction is

Fl = mi. N

or fi = 0.4x 100 = 40N

Here, limiting friction is greater than the applied force so, box  will not move and remain at rest.

so, here only static friction will work.

fs = F = 35N

fs = 35N

fs = 35N static friction force

Static friction is the force that prevents an object from moving along a path. When two fabrics slide over each other, this friction occurs. All around us is friction. For example, when we walk,  our feet  touch  the floor.

When we move, the backward movement of our foot puts pressure on the floor while the other foot moves forward. Furthermore, when we apply this frictional force to the floor, the floor beneath our feet exerts an equal and opposite force. This is consistent with one law of motion.

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Answer:

convert not telling why but it was the answer I gave it says it was right

Momentum of an object is directly proportional to the mass of the object. The corvette  has greater mass and thus more momentum it gains than the little fly.

Momentum of an object is the product of mass and velocity. Thus momentum is directly proportional to the mass and velocity of the object. This relation of momentum with mass and velocity is defined by Newton's law of motion.

According to Newton's third law of motion every reaction has an equal and opposite reaction. Thus if apply a force on object it may return a force but that will depend on the mass and direction.

When the fly hit the moving corvette, the greater impulse will be for the fly since it is very less in mass compared to that of the corvette. The momentum of corvette is higher because velocity and mass of the corvette is significantly higher than that of fly.

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Answer: b) 10.0 m/s

Explanation: Acceleration = [tex]\frac{v-u}{t}[/tex]

V-U
 T

v= final velocity
u= initial velocity
t= time in secs

Answer:

ur mom go study nerd u for real

1092.72 square meters / min, area of the oil slick increasing.

Area = pi*r^2

da/dt = pi*2r*(dr/dt)

da/dt = pi*(2)*(58)*3 = 1092.72 square meters / min.

In a two-dimensional plane, a circle's area is the space it takes up. The area of a circle is another term for the area that lies within a circle's perimeter. A = r2, where r is the circle's radius, is the equation for a circle's surface area. The square unit, such as m2, cm2, in2, etc., is used to measure area. The formula for the area of a circle is (Pi) = 22/7 or 3.14, where (Pi) = r2 or d2/4 in square units. The ratio of a circle's diameter to circumference is known as pi.

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Answer: (A)

Explanation: the answer will be A because a force is acting on the block from the right side to the left side and another from the bottom upwards. So the two forces together will make the block move diagonally to the left. There is no force in the opposing direction of these two force.  B is wrong as there is no force acting on the left side. C is wrong as there is no force acting downward. D is wrong as there is no force acting to the right and from above

If a simple pendulum has a period t on the earth. if it were used on planet x, where the acceleration due to gravity is 3 times what it is on earth,  the time period is 0.577 times the time period on earth.

It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.

As given in the problem a simple pendulum has a period t on the earth. if it were used on planet x, where the acceleration due to gravity is 3 times what it is on earth,

Time period of simple pendulum = 2π √( l / g)

                                                        = 2π √( l / 3g)

Thus, the time period is 0.577 times the time period on earth.

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The input work of a machine with an efficiency of 20% and an output work of 140 J is 28 J

Input work is the work done on a machine as the input force acts through the input distance.

To calculate the input work of the machine, we use the formula below.

Formula:

Where:

Make Wi the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the input work of the machine is 28 J.

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The magnitude of vertical component of the velocity  of the plane when a ball is shot 58 m/s at 40 degree to the ground is 37.28 m/s.

Velocity can be defined as the rate of change of displacement, The S.I unit of velocity is m/s.

To calculate the magnitude of the vertical component of the velocity, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The magnitude of the vertical component of the velocity is 37.28 m/s.

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Voltage produced in the secondary voltage is 1,600 V

A current transformer (C.T.) is a type of "transducer" that produces an alternating current in a secondary winding that is proportional to the current sensed in the primary winding. Current transformers reduce high voltage currents to much lower values ​​and provide a convenient way to safely monitor the actual current flowing in AC transmission lines using a standard ammeter. The working principle of a simple current transformer is slightly different from that of a normal voltage transformer. To calculate voltage in the secondary coil:

N₁/N₂ = V₁/V₂

where;

N₁ is number of turns in primary coil

N₂ is number of turns in secondary coil

V₁ is voltage in primary coil

V₂ is voltage in secondary coil

Now for the given case,

150/2000 = 120/V₂

V₂ = (120 x 2000)/150

V₂ = 1,600 V

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The speed of the baseball after this elastic collision is 35.825 m/s

In an elastic collision is one in which no net loss of kinetic energy in the system is observed after collision. Elastic collisions conserve, momentum and kinetic energy. It works on the basis of the law of conservation of momentum. This may be explained by following equation:

Pₙ = P₁ + P₂

mₙvₙ = m₁v₁ + m₂v₂

Where, Pₙ = final momentum

mₙ = total mass of the system

vₙ = final velocity of the system

For the given question:

(m₁ + m₂)vₙ = m₁v₁ + m₂v₂

(0.145 + 0.95)vₙ = (0.145 × 40) + (0.95 × 35)

1.09 vₙ = 5.8 + 33.25

1.09 vₙ = 39.05

vₙ = [tex]\frac{39.05}{1.09}[/tex]

vₙ = 35.825 m/s

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The magnitude of the force with which the apple has resisted the arrow is 88.06 Newton.

Using, work-energy theorem,

According to which, the work done by the all the forces on the body is equal to the change in kinetic energy of the body.

So, we can write,

Work done = ∆KE

We know,

Work done = force × displacement

The force is the resistive force by the apple and the displayed is given to be 0.075 meters.

So, we can write,

F(0.075) = 1/2M(V²-U²)

Where,

M is the mass of apple,

V is final velocity,

U is initial velocity.

Putting all the values,

F(0.075) = 1/2(0.0213)((25.3)²-(35.5)²)

Solving further,

F = 88.06 Newton

The resistive force of the apple is 88.06 Newton.

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Mechanical robots had first appeared in Milan, Italy, and then in other cities.

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The speed of the plane = 202m/s

What is speed ?

Speed is what it means. the speed at which an object's location changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Speed is a scalar quantity since it just has a direction and no magnitude.

To make equations like Eq. immediately applicable, we accept the textbook's use of positive direction options. Directly beneath the release point, at ground level, is the coordinate origin.. The coordinate origin is at ground level directly below the release point. We write θo = −37.0degree

 for the angle measured from +x, since the angle φo = 53.0 degree

 measured in the problem is in the -y direction. The graphic below depicts the problem's basic configuration.

(A) The plane's speed at the point of release determines the projectile's initial speed. Given

that y0 = 730m and y=0 at t=5.00s,

to find v  : y−yo  =(v sinθo)t− 1/2gt^2 ⇒0.730m=v

sin(−37.0 degree )(5.00s)− 1/2(9.80m/s^2 )(5.00s) ^2

which yields v  =202m/s.

the speed of the plane = 202m/s

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If the additional mass is attached to the ball, it must be large enough to increase the downward acceleration by 35%.

What is acceleration?
An object is said to have been accelerated if its velocity changes. An object's velocity can change depending on whether it moves faster or slower or in a different direction. A falling apple, the moon orbiting the earth, or a car stopped at a stop sign are a few instances of acceleration. Through these illustrations, we can see that acceleration happens whenever a moving object changes its direction or speed, or both. Since acceleration has both a magnitude and a direction, it is a vector quantity. Additionally, it is either the first derivative of velocity in relation to time or even the second derivative of position in relation to time.

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Answer: 20.16kg.m\s

Explanation: Here is given that M= 7.2 Kg,  and           v= 2.8 m/s So, momentum ,P=M. v = (7.2*2.8) = 20.16 Kg. m/s, which is a number having four significant digits. but we have to provide the answer in two significant digits. Therefore, to convert

Stephen Hawking, speaking at the opening of the 2012 London Paralympics games, said, “There is no such thing as a standard run-of-the mill human being and however difficult life may seem but there is always something you can do, and succeed at.”

Stephen Hawking was born on 8th January, 1942, Oxford, England. He died on March 14, 2018, Cambridge. He was that theoretical physicist whose theory of exploding black holes drew upon both relativity theory and quantum mechanics. He had also worked with space-time singularities.

Hawking was also awarded the US Presidential Medal of Freedom in year 2009.

At the age of 21, Hawking was diagnosed with amyotrophic lateral sclerosis that gradually paralyzed him. Stephen Hawking had an estimated IQ of 160. According to Healthline, 68% of people have an IQ that ranges between 85 and 115.

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Answer:

neutrons.........................

The vehicle has an acceleration of 5 m/s² -  A motorbike, when its speed changes from rest to 50 m/s in 10s

What is an acceleration ?

Acceleration is the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Acceleration is a vector quantity since it has both a magnitude and a direction. A vector quantity is also velocity. The velocity vector change during a time interval divided by the time interval is the definition of acceleration.

All the vehicles have an initial velocity ( u) = 0
A- For bicycle
Final velocity (v) = 2.5m/s    time (t) = 2s
acceleration = 2.5/2 = 1.25m/s2

B- For car
Final velocity (v) = 15m/s    time (t) = 5s
acceleration = 15/5 = 3m/s2

C- For lorry
Final velocity (v) = 20m/s    time (t) = 15s
acceleration = 20/15= 1.33m/s2

D- For motorbike
Final velocity (v) = 50m/s    time (t) = 10s
acceleration = 50/10= 5m/s2

Option D is the correct answer as the motorbike will have an acceleration of 5m/s2.
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According to the law of reflection, the light from the item cannot bounce off the mirror and reach his eye across his line of sight.

According to the law of reflection, the light from the item cannot bounce off the mirror and reach his eye across his line of sight. Ray is unable to see the object's reflection in the mirror because the object's light does not reach his eye.

The law of reflection, the angle of the reflected beam is equal to the angle of the incident ray while reflecting from a smooth surface. (In geometrical optics, all angles are usually measured in relation to the surface normal, or a line perpendicular to the surface.

In physics, the rule of reflection is used to locate an image that is reflected in a mirror. One effect of a law is that if you can see someone's eyes through a mirror (or the eyes of another species), you can assume that he may see your eyes as well because of how reflection function.

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The magnetic field in the solenoid due to current 1.2A  is 54.807 x 10⁻⁵ A/m

The No. of Loops in the solenoid, N = 200

Length of the solenoid, l = 55 cm

The current passing through the solenoid, I = 1.2 A

The magnetic field passing through the solenoid can be calculated using the Ampere's law which is

                      B = μ₀nI

where B is the magnetic field

          μ₀ is the permeability of free space

          n is the no. of turns per meter

          I is the current passing through the solenoid

Thus , we can re-write this formula a

                    [tex]B = \frac{\mu_0 N I}{l}[/tex]

Let us substitute the know values in the above equation , we get

                  B = (4 x 3.14 x 10⁻⁷ x 200 x 1.2 ) / (55 x 10⁻²)

    where μ₀ = 4π x 10⁻⁷

                 B = 3014.4 x 10⁻⁷ / 55 x 10⁻²

                 B = 54.807 x 10⁻⁷ x 10²

                 B = 54.807 x 10⁻⁵ A/m

Therefore , the magnetic field passing through the given solenoid is

54.807 x 10⁻⁵ A/m

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Amy's distance and displacement if she runs 2 miles south, then turns around and runs 3 miles north is 1 mile.

This is referred to as the change in the position of an object and it is usually measured in meters by finding the difference in location between the two bodies involved.

We were told that she runs 2 miles south, then turns around and runs 3 miles north and they are at exact opposite sides on the map which means that the displacement will be:

3 miles - 2 miles

= 1 mile hence, it is the correct choice.

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Answer:

It would stretch about 6 inches, but it depends on the metal.

Explanation:

pls mark brainliest with the crown

Answer

Ground Zone

Explanation

The final zone is the Ground zone. It contains lichen, club mosses, and true mosses. The deciduous forest has four distinct seasons, spring, summer, autumn, and winter. In the autumn the leaves change color.

Answer: B Ground

Explanation:

The net force on an object if a  force of 30 N to the right is applied to an object. An opposite force of 20 N to the left is applied to the same object is 10 N to the right. And the right option is D.

The net force is the vector sum of all the forces that act upon an object.

To calculate the net force applied to the object, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence the right option is D. 10 N to the right.

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The force experience by a van of 3500 kg when it hits a car of 2500 kg with a force of 1480 N is 1057.14 N.

Force can be defined as the product of mass and acceleration.

To calculate the force experienced by the van, we use the formula below

Formula:

Where:

From the question,

Substitute these values into equation 1

Hence, the force experience by the van is 1057.14 N.

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