Aclosed system of mass 10 kg undergoes a process during which there is energy transfer by work from the system of 0.147 kj per kg, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. the specific internal energy decreases by 5 kj/kg and the acceleration of gravity is constant at 9.7 m/s2. determine the heat transfer for the process, in kj.

An uplifted block of rock between two normal faults

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?