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Physics

Carter Chase

True or False? An airplane is flying West at 200 kilometers per hour 2 hours later it is flying West at 300 km/h its average acceleration is 100 kilometers per hour.

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Physics

Carson Liu

Why is it easy to remove air from balloon and difficult from glass bottle

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Physics

Luka

What is an example of radiation? check all that apply

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Physics

Alia Marks

A student is trying to decide what to wear. His bedroom is at 20.0°C. His skin temperature is 30.0°C. The area of his exposed skin is 1.45 m2. People all over the world have skin that is dark in the infrared, with emissivity about 0.915. Find the net energy loss from his body by radiation in 14.3 min.

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Physics

Emely Marshall

A 104 horse-power suv speeds up from 21 m/s to 29 m/s in 3 seconds, what is the mass of the suv?

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Physics

Eugene Cole

Stars that are closer look-

A. brighter

B. dimmer

C. white

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Physics

Adalyn Hill

The net change in energy equals the energy transferred as work and as heat is called what

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Physics

Alexia Bonilla

The law of conservation of energy states that momentum is conserved in a

collision.

true or false

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Physics

Aedan Lynch

When the driver steps on the accelerator, the drive wheels of the car push horizontally against the ground with a force of 4500 N. The rolling friction of the car can be neglected, but the heavier truck has a rolling friction of 760 N, including the "friction" of turning the truck's drivetrain. What is the magnitude of the force the car applies to the truck?

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Physics

Elsa Mcdonald

What is the monument of a 1200 kg truck traveling at a speed of 25 m/s?

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Physics

Frauline

If a cheetah runs at 25 m/s, how long will it take a cheetah to run a 100 m dash?

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Physics

Jane

A gardener pushes her 90 kg wheelbarrow in a straight line out of her garage and across the yard in 18 s. If her average velocity is 1.5 m/s, what is her displacement?

A. 0.8 km

B. 12 km toward the garden

C. 18 m toward the garage

D. 27 m away from the garage

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Physics

Grey

What is true about the refractive index of a medium?

A.

It increases with an increase in angle of incidence.

B.

It decreases with a decrease in angle of refraction.

C.

It decreases with an increase in angle of incidence.

D.

It is independent of any change in angle of incidence or angle of refraction.

E.

It increases with a decrease in angle of refraction.

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Physics

Gillespie

A car accelerates from rest to 19 m/s in 6 seconds. What is the acceleration of the car?

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Physics

Olivia Mccullough

An apparatus similar to the one used in lab uses an oscillating motor at one end to vibrate a long rope with frequency f = 40 Hz and amplitude A = 0.25 m. The rope is held at constant tension by hanging a mass on the other end. The rope has mass denstiy μ = 0.02 kg/m, and tension T = 20.48 N. Assume that at t = 0 the end of the rope at x = 0 has zero y-displacement and is moving downward. What is the y-displacement of the piece of rope at x1 = 0.5 m when t = 0? y1 =

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