Find the amount of heat conducted per second through a bar of aluminum if the cross sectional area is 30 cm the length of the bar is 1.5 m and one of the ends has a temperature of 25°c and the other has a temperature of 300°c. thermal conductivity of aluminum is 1.76 x 10^4 cal cm / m^2 h°c convert the units as needed

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?