Compressed air can be pumped underground into huge caverns as a form of energy storage. the volume of a cavern is 6.8 × 105 m3, and the pressure of the air in it is 8.6 × 106 pa. assume that air is a diatomic ideal gas whose internal energy u is given by . if one home uses 30.0 kw h of energy per day, how many homes could this internal energy serve for one day?

Rubber on floor tile has a coefficient of kinetic friction of 1.0 and a coefficient of static friction of 2.0. how much force would a 3.5 lb. robot need to produce in order to start moving?

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

Aphysical change is a change in the size, shape,, or stafe of matter true or false