The magnetic field in a region of space is specified by its x, y, and z components which are respectively bx = 0.146 t, by = 0.177 t, and bz = 0.200 t. if a 30.0-cm wire carrying a current of 3.35 a is oriented along the z-axis with the current in the −z direction, determine the magnitude and direction of the force acting on the wire.

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Difference between series and parallel circuits

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.