An electron moves along the z-axis with vz=3.0×107m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (x, y, z) positions? a) (2, 0, 0)... Bx, By, Bz = ?
b) (0, 0, 1)... Bx, By, Bz = ?
c) (0, 2, 1)... Bx, By, Bz = ?

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

Consider the phase change taking place in the picture. you could use all but one statement to describe what is happening here. that is: a) temperature is increasing. b) kinetic energy is increasing. c) the space between the particles remains the same. d) the attractive force between the particles is decreasing.