A train travels 94 kilometers in 2 hours, and then 58 kilometers in 4 hours what is it's average speed

What causes an atom to be neutral? Equal number of protons and neutrons Equal distance between the nucleus and electrons Equal number of electrons and protons Equal distribution of electrons

Solar energy is: expensive renewable inefficient during winter all of the above

When an automobile moves with constant velocity, the power developed in a certain engine is 76.8 hp. What total frictional force acts on the car at 51.7 mi/h?

An ice cube that is dropped into a glass of water melts because

Suppose water waves are moving from the deep end to the shallow end of the pool. That is, the waves are moving into a medium (shallow water) where they slow down. In what direction will the waves turn slightly, and why

When a wire loop is connected to a battery, what is produced in the loop?

A solid sphere of radius R has a total charge Q distributed evenly throughout its volume. What fraction of the total charge is located inside a radius R/2?

What is Nothing. (sorry i have been wondering this for a very long time)

What is the speed of a bobsled whose distance-time graph indicates that it traveled 123m in 28s?

Eric has a mass of 80 kgkg. He is standing on a scale in an elevator that is accelerating downward at 1.7 m/s2m/s2. What is the approximate reading on the scale?