What force is needed to accelerate a mass of 50kg to 25 m/s^2

Many Amtrak trains can travel at a top speed of 47.0 m/s. Assuming a train maintains that speed for several hours, how many kilometers will the train have traveled after 5.00 hours? Round to the nearest km.

A portable music player, operating with four 1.5 V cells connected in series, provides a resistance of 15 000 Ω. What amount of current is flowing through the music player?

A student wants to demonstrate entropy using the songs on her portable music player. What should she do to demonstrate the highest entropy? A. Play only the classical songs on shuffle. B. Play all the songs in order by artist. C.

While an airplane is in flight, four forces act on it. Thrust is caused by the airplane's propellers pushing through the surrounding air, pulling the airplane forward. Drag is caused by the air smacking into the plane's surface, pushing it backward.

A ball is thrown up onto a roof, landing 4 sec later at height of 20m above the release level. The balls path just before landing is angled at 60 degree with the roof. a) find the horizontal distance d it travels.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall

Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be A) zero. B) the same as before.

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?