1 A race car with 4,450,000J is moving at a speed of 89.4m/s. what is the mass 2 A 0.625kg ball is shot up 600cm in the air what is the energy of the bal at the top?

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

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.