A roller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, its speed is 4 m/s. But 3 seconds later, its speed is 22m/s. what is its average acceleration?

What is wrong with the following statement: When you exert a force on a baseball, the equal and opposite force on the ball balances the original force and therefore, the ball will not accelerate in any direction.

Describe the general relationships that exist among distance from the spreading centers, heat flow, age of the crustal rock, and ocean depth.

You are on a hike in the mountains. You have 3.79 km left to go before your next campsite. The sun will set in 6.93 h. What average speed must you walk to get to camp at sunset? Answer in units of km/h

A proton is projected in the positive x direction into a region of uniform electric field E (-6.60 x 105) i N/C at t 0. The proton travels 7.20 cm as it comes to rest. (a) Determine the acceleration of the proton.

The energy associated with the random motion of molecules or atoms within a substance is

For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy ... ?

Can hand sanitizer be used as rubbing alcohol

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?