36 b&c. Bits plsssssss
Dear Student
b)
kW stands for kilowatt. A kilowatt is simply 1,000 watts, which is a measure of power. So a 1,000 watt drill needs 1,000 watts (1 kW) of power to make it work, and uses 1 kWh of energy in an hour. That’s why, if you leave a TV or computer on standby, it is still using power and creating a kWh cost on your energy bill.
Power is defined as the rate of doing work or the rate of transfer of energy. The unit of power is watt or kilowatt. [1 kW= 1000W] (ii) Kilowatt is the unit of power while kilowatt hour is bigger unit of energy kWh = 1000 x 3600
1 kilowatt hour
c)
Given, mass of water = 2000 tonnes
Mass of water 2000tonnes=2000000kg
Power = work done per unit time.
Work done=mgh
2000000×10×200
==4000000000
So,the power=4000000000/60
W=6.67×107 W
Regards
b)
kW stands for kilowatt. A kilowatt is simply 1,000 watts, which is a measure of power. So a 1,000 watt drill needs 1,000 watts (1 kW) of power to make it work, and uses 1 kWh of energy in an hour. That’s why, if you leave a TV or computer on standby, it is still using power and creating a kWh cost on your energy bill.
Power is defined as the rate of doing work or the rate of transfer of energy. The unit of power is watt or kilowatt. [1 kW= 1000W] (ii) Kilowatt is the unit of power while kilowatt hour is bigger unit of energy kWh = 1000 x 3600
1 kilowatt hourc)
Given, mass of water = 2000 tonnes
Mass of water 2000tonnes=2000000kg Power = work done per unit time.
Work done=mgh
2000000×10×200
==4000000000
So,the power=4000000000/60
W=6.67×107 W
Regards