How many atoms of hydrogen are there in one molecule of water, if the chemical formula is H2O? 0 1 2 3

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?