Two small, positively charged spheres have a combined charge of 39.0 × 10-5 C. If each sphere is repelled from the other by an electrostatic force of 1.00 N when the spheres are 2.00 m apart, what is the charge on the sphere with the smaller charge?

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

What is the coefficient of kinetic friction μk between the block and the tabletop?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these