Arock of mass 0.24 kg falls from rest from a height of 20 m into a pail containing 0.40 kg of water. the rock and water have the same initial temperature. the specific heat capacity of the rock is 1850 j/(kg · c°). ignore the heat absorbed by the pail itself, and determine the rise in the temperature of the rock and water.

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

In what direction does an applied force move an object