Who discovered the law of universal gravitation?
a. joule
b. tesla
c. newton
d. percival

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

Write a question about how changing temperature affects the gas inside the sports ball

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m