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What is the power of a CD player if it uses 60000 joules for 30 minutes assuming 100 percent efficiency?
Power = energy used/time to use it
Power of this CD player = 60,000/(30 x 60) = 331/3 watts
That solution doesn't depend on the player's efficiency ... you specified
only the energy it uses.
But since you did mention the concept of efficiency, I'm compelled to add a
thought here: If you're describing the kind of CD player that you can carry
in your pocket and listen to it on the bus, then 33 watts is an astronomical
power consumption for it. You'd need to carry a back-pack full of batteries,
and recharge them every few hours.
If these are real figures, and the thing really does consume 33 watts in normal
use, then I hope it plugs into the wall, and drives a nice pair of speakers.
What else can I help you with?
Find the efficiency of a machine that does 800 joules of work if the input work is 2400 joules?
.33
What is 130 juels equal to?
Assuming that juels is your attempt to spell joules, the answer is 1 newton-metre.
You do 425 J of work to push a 75 N box up a ramp 2.5 m above the ground What is the the efficiency?
The box acquires (75 x 2.5) = 187.5 joules of gravitational potential energy.The efficiency of your effort is (187.5 / 425) = 44.1% (rounded)
If a 17 foot wind turbine can produce 3 Kwatts is that per day or hour or minutes?
3 Kilowatts is a measure of electrical power and means the wind turbine produces 3,000 joules per second. So the question is fairly meaningless, assuming the wind is at the right speed it will be producing 3kW every second, every hour and every day!
An electric drill has an efficiency of 75 percent. If the motor has a power input of 700 watts and is run for 30 seconds. How much actual work is done. How would I get a kilojoules answer?
Power input = 700 WEfficiency = 75% so power output = 75% of 700 = 525 W Time = 30 seconds => Work done = 525W * 30s = 15750 W.s = 15750 Joules = 15.75 kiloJoules.
What is the efficiency of a car's engine when the heat input is 100000 joules and the waste heat is 75000 joules?
25%
What is the efficiency of lawn mower's engine when the heat input is 1000 joules and the waste heat is 750 joules?
25 percent
What is efficiency of lawn mower's engine when the heat input is 1000 joules and the waste heat is 750 joules?
25 percent
What is efficiency measured in?
Efficiency is measured in joules.
What is the efficiency of a machine that requires 100 joules of input energy to do 35 joules of useful work?
The machine efficiency is 35 percent (35/100).
What is the machine efficiency of a machine that produces 400 joules of work output from a work input of 500 joules?
The efficiency is 80%. To find the efficiency, 400/500 = 80%.
What is the mechanical efficiency of a machine that produce 400 joules of work output from a work input of 500 joules?
The efficiency is 80%. To find the efficiency, 400/500 = 80%.
Find the efficiency of a machine that does 800 joules of work if the input work is 2400 joules?
.33
If the work put into a lever is 930 joules and the work accomplished is 870 joules the efficiency of the lever is?
The efficiency of the lever can be calculated as the ratio of the output work to the input work, multiplied by 100% to express it as a percentage. In this case, the efficiency would be 870 joules (output work) divided by 930 joules (input work), multiplied by 100% which equals 93.55%.
How Efficiency is measured in joules?
Efficiency is typically measured as the ratio of useful energy output to the total energy input, expressed as a percentage. In terms of joules, the efficiency can be calculated as the useful energy output in joules divided by the total energy input in joules, multiplied by 100. This calculation helps assess how effectively a system converts energy input into useful output.
How many joules of thermal energy are required by a coal plant with an efficiency of 36.5 percent to generate one joule of electrical energy?
Here you must calculate 1 / 0.365.
How much mechanical energy will be provided by a motor that is 70 percent efficient and requires 1960 joules of energy?
To calculate the mechanical energy provided by the motor, you need to divide the input energy by the efficiency of the motor. In this case, with 70% efficiency, you would divide 1960 joules by 0.70 to find that the mechanical energy provided would be approximately 2800 joules.
