Why does the atomic mass only include protons and neutrons (not electrons) ?

En saved Question 19 of 31 If a bat with a mass of 5 kg and acceleration of 2 m/s2 hits a ball whose massis 0.5 kg in the forward direction, what is the reaction force of the ball on the bat?

Give two examples of spatial interference which can be easily observed.

Explain newton's laws of motion and give an example of each

If you are traveling at 60 mph, how far do you travel during the 2.0 seconds (5.6 x 10^-4 hour) it takes you to look down and find your cell phone?

Which process increases the potential energy of the particles of a sample

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.

What is a magnetic field and how does it interact with magnetic materials?