Blocks with masses of 2.0 kg, 3.0 kg, and 4.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 20 N force applied to the 2.0 kg block. a) How much force does the 3.0 kg block exert on the 4.0 kg block?

b) How much force does the 3.0 kg block exert on the 2.0 kg block?

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island