An electron is released from rest in a uniform electric field and accelerates to the east at a rate of 4x106m/s2. What is the magnitude and the direction of the electric field?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

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.

How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?