An electromagnet does not attract a piece of iron TRUE or FALSE

The statement, "Energy can neither be created nor destroyed, but can change from one form to another," is what law?

A locomotive has a mass of 200,000kg. It is moving at 4.5m/s. Find its momentum.

When a 70 kg man sits on the stool, by what percent does the length of the legs decrease? Assume, for simplicity, that the stool's legs are vertical and that each bears the same load.

A space probe is fired as a projectile from the earth's surface with an initial speed of 2.44 104m/s. what will its speed be when it is very far from the earth? ignore atmospheric friction and the rotation of the earth.

Read the sentences from the section "Humans Seen As Reason For Recent Global Warming." Scientists say that CO2 is the greenhouse gas most responsible for global warming.

Objects can be accelerating and traveling at constant velocity at the same time. True or False

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

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.