If two point charges are separated by 1.5 cm and have charge values of 2.0 C and 4.0 C, respectively, what is the value of the mutual force between them? 32000 N
3.6 x10–8 N
8.0 x10–12
320 N
3.1 x10–3 N

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.