Awater tower is a familiar sight in many towns. the purpose of such a tower is to provide storage capacity and to provide sufficient pressure in the pipes that deliver the water to customers. the drawing shows a spherical reservoir that contains 3.88 x 105 kg of water when full. the reservoir is vented to the atmosphere at the top. for a full reservoir, find the gauge pressure that the water has at the faucet in (a) house a and (b) house b. ignore the diameter of the delivery pipes.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.