A100 g aluminum calorimeter contains 250 g of water. the two substances are in thermal equilibrium at 10°c. two metallic blocks are placed in the water. one is a 50 g piece of copper at 66°c. the other sample has a mass of 71 g and is originally at a temperature of 100°c. the entire system stabilizes at a final temperature of 20°c. determine the specific heat of the unknown second sample.

At what point the certain object feels zero garvitational force between earth and the moon. take the required information from the book. required: distance away from earth or moon

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.