8 CO DOG COMBIN POINTS EARNED COMBINED ERCENT ORRECT ETTER RADE SCORE RESCORE on ALL RIGHTS 61) A moving object has A) speed. B) momentum. C) energy. D) velocity. E) all of the above 62) Inside a freely falling elevator your A) weight is zero. B) acceleration is zero. C) gravitational interaction with Earth is zero. all the above D) E) none of the above 63) Melting and freezing are both A) changes of phase. C) processes of molecular transfer. 64) Atmospheric pressure is caused by the A) effect of the Sun's energy on the atmosphere. C) temperature of the atmosphere. B) opposite processes. D) all of the above B) weight of the atmosphere. D) density of the atmosphere. 65) Exert 1 N for a distance of 1 m in 1 s and you deliver a power of A) 3 W. B) 2 W. C) 1 W. D) 1/3 W. E) none of the above 68) Your weight is 66) Calculate the following to the correct number of significant figures. 81.25 x 0.0014 A) 0.1 B) 0.114 C) 0.11 67) An important underlying feature of hydraulic devices is the conservation of A) energy. B) pressure. C) momentum. D) all of the above E) none of the above A) a property of mechanical equilibrium. B) the gravitational attraction between you and Earth. C) the same in all locations. D) another word for your mass. D) 0.1138 69) A shopping cart moves with a kinetic energy of 40 J. If it moves at twice the speed, its kinetic energy is A) 160 J. B) 80 J. C) 40 J. D) not enough information