A pole-vaulter develops 1,500 W of power while lifting herself in 2.5 sec. How much work did the pole-vaulter do?

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *