A good way to de-magnetize something is to
O A. get it wet
O B. place it in a magnetic field
C. heat it
D. place it in an electric field

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?