Most substances in temperature and when heat is added to them. a. increase; contract b. increase; expand c. decrease; contract d. decrease; expand

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

Coal contains energy. a. light b. kinetic c. chemical d. mechanical