A 2.1 kg sample of water at 35 degrees Celsius is poured into a lake. The temperature of the lake water is 10 degrees Celsius, and it remains essentially constant as the 2.1 kg sample cools down within it. What is the entropy change of the lake water? Let the specific heat capacity of water = 4190 J/(kg*K)

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

What are chlorofluorocarbons and what impact do they have on the atmosphere?