Q1.calculate the power of an engine which can supply 60kJ energy per minute.
Q2.Calculate the time taken by 100 W bulb to consume 3500J of energy.
Q.3 Define Power. What is its SI unit?.
Q.4 What is the value of 1 horse.
Answers
Answer:
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Answer:
A1. power=work/time
work = 18 kj = 1000×18 = 18000
time given= 1 minute = 60 seconds
power = 18000 ÷ 60 = 300
A2. power = energy / time
time = energy/ power
time = 3500 / 100
time = 35 seconds
A3. Power (P) is the rate at which energy is transferred or converted. Thus, power equals work divided by time (P = W / t). The SI unit of power is the watt (W), in honor of Scottish inventor James Watt.
A4. The electrical equivalent of one horsepower is 746 watts in the International System of Units (SI), and the heat equivalent is 2,545 BTU (British Thermal Units) per hour.
Explanation:
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