O que acontecerá ao rendimento de uma máquina térmica se a temperatura da fonte que emite calor for reduzida em relação á fonte que recebe esse mesmo calor?

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

An airplane is flying with a velocity of 240 m/s at an angle of 30.0∘ with the horizontal, as the drawing shows. when the altitude of the plane is 2.4km,a flare is released from the plane. the flare hits the target on the ground. what is the angle θ?

This problem has been solved! see the answer capacitor 2 has half the capacitance and twice the potential difference as capacitor 1. what is the ratio (u_{\rm c})_1/\,(u_{\rm c})_2