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.

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Heterogeneous mixture with larger particles that never settle is

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation