Hot water coil is used to heat air in a home heating unit. The air flow rate is 150 lbm/min and enters the coil at 70 F. Water enters the coil at 150 F and leaves at 100 F. If the air is heated to 120 F, what flow rate of water is required

Estimate the kinetic energy of mars with respect to the sun as the sum of two terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. (assume mars is a uniform sphere with mass = 6.4×10 to the power of 23 kg, radius = 3.4×10 to the power of 6 m, rotation period = 24.7 hours, orbital period = 686 days and is 2.3×10 to the power of 8 km from the sun.)