An airplane changes its velocity uniformly from 150 m/s to 60 m/s in 15 s. Calculate:

a. Its acceleration

b. The distance traveled in that time

Which wavelength of light is capable of penetrating the dust of a nebula?

Why can gases be compressed

How do mass and speed affect the inertia of an object?

Calculate the coefficient of kinetic friction for a 1,500 kg car moving at 62 km/h that skids 18 m to rest when its brakes are locked. Speed must be in m/s.

Trace the path of energy from the sun to mechanical energy in an organism

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.

At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm that is needed to cause a 2.75 a current to flow?

A conductor has a net charge of + 24 uC. How many electrons are needed to make this conductor neutral