Aproton, which moves perpendicular to a magnetic field of 1.35 t in a circular path of radius 0.072 m, has what speed? (qp = 1.6 · 10 19 c and mp = 1.67 · 10 27 kg)

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little