2) For each item, describe one real-life experiment that is consistent with the energy transfers described.

a) The total amount of work on an object is positive causing the kinetic energy of an object to increase.
b) An object’s kinetic energy is converted into gravitational potential energy.

c) An object’s gravitational potential energy is converted into thermal energy.
d) An object’s gravitational potential energy is converted into elastic (e. g. spring)

potential energy

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)