A student is trying to build his carpeting home business and is wondering how much
money he will have to put aside each month to pay for using his electric saw. What
will it costs him to operate his electric saw rated at 0.350kW for 5.0 hrs a day for
30 days if the cost of electrical energy is $0.06/kWh?
A)$1750
B)$150
C)$6.36
D)$3.18

If the new moon happens on january 15th, what shape will it be on february 6th?

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)

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign