A pitcher throws a baseball at 45 m/s. The baseball has a mass of 400 grams. Disregarding air resistance, the baseball's momentum when it hits the catcher's mitt is a0 kg*m/s.

If the nucleus of an atom contains 12 protons how many electrons are there in a neutral atom why

A person throws a rock 36 feet into the air straight up what was the rocks initial vertical speed

What is the current when the resistance is 5 ohms and the voltage is 10 volts? A. 10 - 5 = 5 amps B. 10 : 5 = 2 amps C. 10 * 5 = 50 amps D. 10 + 5 = 15 amps

A man pushes a drum of oil 10kg up an incline OA. If OA is 5m and AB is 3m, what is the potential energy of the drum at A.

An atom of helium and one of argon are singly ionized - one electron is removed from each. The two ions are then accelerated from rest by the electric field between two plates with a potential difference of 150 V.

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why: