Two particles with charges of +5.70 nC and −9.65 nC are separated by 2.40 m. (a) What is the magnitude of the electrostatic force between the particles? N (b) Is this force attractive or repulsive? attractive repulsive

Which situation will produce the greatest change of momentum

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.

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory