Environmental Science A dependent variable is a. directly changed by the experimenter. b. manipulated by changes to the independ
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Answer:
Explanation:
Temperature of the house,
Convert to rankine,
Heat is extracted at 40°F i.e
Calculate the coefficient of performance of the heat pump, COP
The minimum power required to run the heat pump is given by the formula:
...............(*)
Where the heat losses from the house,
Substituting these values into * above
Answer:
Power input, P = 2880 watts
Explanation:
It is given that,
Voltage of the motor, V = 240 V
Current required, I = 12 A
Weight lifted, W = 2000 lb
It is lifting at a speed of 25 ft/min. We need to find the power input to the motor. The product of current and voltage is called power input of the motor.
P = 2880 watts
So, the power input of the motor is 2880 watts. Hence, this is the required solution.