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 7.92 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.

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

What is created when solids,liquids,an gases mix with one another