Watt is a unit of power.
watt hours is a unit of energy.
(Note x watts times y hours is what you pay for on your electric bill.)
A watt is a unit of power - how fast energy is transferred, or in other words, how fast work is done. "Work" can simply be understood as a transfer of certain types of energy.
Watt is a unit of power (energy per unit time - i.e., rate of energy transfer). Specifically, 1 watt = 1 joule / second.
Work is the transfer of mechanical energy; its units are the same as for energy, for example joule. Power is the rate of transfer of energy, and it has units of energy/time, for example watt.
In the sense of 'work' as force moving through a distance, a light bulb does none of that. But in the sense that mechanical work is equivalent to energy in other realms, the 75-watt light bulb consumes 75 joules of electrical energy every second, and radiates 75 joules per second of energy in the form of light and heat.
Watt is a unit of power. 1 Watt = 1 Joule/second; joule is the unit for energy.
A watt is a unit of power - how fast energy is transferred, or in other words, how fast work is done. "Work" can simply be understood as a transfer of certain types of energy.
No. One watt is one joule/second.
Watt is a unit of power (energy per unit time - i.e., rate of energy transfer). Specifically, 1 watt = 1 joule / second.
Power; its SI unit is watt. Please note that this is notspecifically an electrical unit; "power", and the unit "watt", is the rate of energy conversion, and can be used anywhere where energy is converted - whether "work" is involved, or some other (non-mechanical) energy.
Work is the transfer of mechanical energy; its units are the same as for energy, for example joule. Power is the rate of transfer of energy, and it has units of energy/time, for example watt.
P(watt)=energy/time. Where power in measure in watt directly proportional to energy(work) and inversely proportional to time in seconds. 1W = .001kW
A watt is a unit of power, not of energy. The international unit for energy is the joule. One watt is an energy transfer of one joule per second.A watt is a unit of power, not of energy. The international unit for energy is the joule. One watt is an energy transfer of one joule per second.A watt is a unit of power, not of energy. The international unit for energy is the joule. One watt is an energy transfer of one joule per second.A watt is a unit of power, not of energy. The international unit for energy is the joule. One watt is an energy transfer of one joule per second.
Joule
Joule
You have all the right words, but the concept is backwards. Energy is the amount, power is the rate of energy. One watt of power is required to move one joule of energy in one second.
The energy used (work done, same thing) is 120 watt-hours, which is also 0.12 units or 120x3600 joules.
Light bulbs always use energy. Therefore to save energy they should be switched off. But certain types of bulb use much less energy than others: Incandescent: 10 lumens per watt Halogen: 13 lumens per watt Fluorescent: 50-60 lumens per watt (cheap to buy) LED: 50-70 lumens per watt (expensive to buy)