J8. over several cycles, a refrigerator compressor does work on the refrigerant. this work is equivalent to a constant pressure of 413 × 105 pa compressing a circular piston with a radius of 0,.019 m a distance of 25.0 m. if the change in the refrigerant's internal energy is 0 j after each cycle, how much heat will the refrigerant remove from within the refrigerator?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.