Two-point charges with charges q1 = 3.0 x 10-6 c and q2 = 2.0 x 10-6 c are separated by a distance of 30cm. a third charge qo =4.0 x 10-6 c is placed between the initial two charges 10cm from q1. from coulomb’s law, the force exerted by q1 on qo is 10.8n and the force exerted by q2 on qo is 1.8n.

determine using a labelled diagram (a) the net electrostatic force acting on the charge qo. (b) what is the electric field (force per unit charge) at the location of the charge, qo due to the other two charges?

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.