Draw a free-force body diagram of all the forces acting on the stopper that is being rotated on the string above one’s head in a horizontal circle of a fixed radius.

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

Explain what happens at the saturation point when adding salt to water at room temperature.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass