Which are equivalent equations? Select two correct answers. s = s equals StartFraction L A Over pi r EndFraction.
s = s equals StartFraction pi r Over L A EndFraction.
s = LAr
r = r equals StartFraction L A Over pi s EndFraction.
r = LAs

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?

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)