What are some water sources that not be easily used to supply human water needs?

If you wanted to learn more about ancient scientific knowledge, whose life would you research?

you slide across home plate during baseball game. If you have a mass of 82 kg, and the coefficient of kinetic friction between you and the ground is 0.45, what is the force of friction acting on you?

During a collision with another car, the occupants of a minivan initially travelling at 4.0 m/s come to a complete stop in 0.5 s. What was the acceleration of the occupants of the minivan? a) 8.0 m/s2 b) - 8.0 m/s2 c) 2.0 m/s2 d) - 2.0 m/s2

An airplane, diving at an angle of 50.0° with the vertical, releases a projectile at an altitude of 554. m. The projectile hits the ground 8.00 s after being released.

Explain how Newton's cradle demonstrates the law of conservation of energy.

How long does it take a car to travel 450 km at 75 km/hr

A free-falling golf ball strikes the ground and exerts a force on it

What are the main activities involved in studying physics?

What is the energy that moves your arms and legs

A moving object can be in equilibrium. Explain.