020 10.0 points
a(n) 60 kg astronaut becomes separated from
the shuttle, while on a space walk. she finds
herself 73.4 m away from the shuttle and mov-
ing with zero speed relative to the shuttle. she
has a(n) 0.801 kg camera in her hand and de-
cides to get back to the shuttle by throwing
the camera at a speed of 12 m/s in the direc-
tion away from the shuttle.
how long will it take for her to reach the
shuttle? answer in minutes.

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)