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How much power is needed to do 1000 joules of work if a box takes 50 s to lift it?
Wiki User
∙ 10y ago
Power is the rate of doing work or work that can be done per unit of time.
Power = ( Work ) / ( Time )
P = ( W ) / ( t )
P = ( 50 J ) / ( 2s ) = 25 watts
1.0 watt = 1.0 N - m / s = 1.0 J / s
1.0 horsepower = 550 ft - lbf / sec
1.0 horsepower = 745.7 W = 0.7457 kW
Wiki User
∙ 9y ago
Wiki User
∙ 13y ago100 joules / 0.5 second = 200 watts
100 joules / 1 second = 100 watts
Nemrod Escoltora
Wiki User
∙ 13y agoThe formula for power is: Power = Work/time or P = W/t
So, Power = W/t = 100 J / 2 s = 50 Watts
a Watt is the unit of power (Joule per second)
Wiki User
∙ 9y agoit takes 20 watts
Wiki User
∙ 10y ago20w
Nemrod Escoltora
100.5
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Jules into kilojules?
kilo means 1000. 1 kilojoule = 1000 joules
An electric jug full of water needs 480000 joules to bring it to boil The element power is 1 Kilowatt how long will the jug take to boil?
1 kilowatt = 1000 joules per second, so it will take 480 seconds. (8 minutes).
If you apply a force of 10 N to a box and push it 10 m in 10 s how much power did you deliver?
as power=P=W/t=Fd/t=(10)(10)/10=10Watt
How much energy must be added to a 2-kg of glass with a specific heat of 644 J kg to increase its temperature from 10oC to 50oC?
51,520 Joules must be added to increase it's temperature to 100 C.
How many joules in a kilowatt?
One watt is defined as one joule per second. So one kilowatt is defined as 1000 joules per second.Don't confuse Energy (joules) with Power (watts). Power is the rate of production of energy, so it must have dimensions which include per second or per hour, or per some other unit of time.Actually, the definition of joule is a unit of work just like the definition of watt -- it's the amount of work done by one newton (0.101971621 kilograms) done over the distance of 1 meter. here's how merriam-webster defines it -Definition of JOULE: a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meterhere's how they define a watt -Definition of WATT: the absolute meter-kilogram-second unit of power equal to the work done at the rate of one joule per second or to the power produced by a current of one ampere across a potential difference of one volt : 1⁄746 horsepowerso you can see, joules are also expressed in seconds, hours, etc. a watt can be used to express a total power without using it as a time based quantity, just like joules, when viewing it as to how much power, energy, what have you, at any given time slice. a circuit whose load is 1 amp, and has 1 volt across that load, is using 1 watt. in 1 minute, the total energy used would be 60 joules. the thing is, not all equations need joules expressed in time -- they just use the total amount of joules required (E=MC2 for example says you can create a given mass (in kilograms) if you have enough energy (in joules) divided by the speed of light squared (in kilometers per second -- i.e. 300,000 squared). thus in theory, you can create 1kg of mass with 90000000000 joules of energy. so, to make a long explanation just slightly longer, you can make 1kg of mass with 90 GW (gigawatts) of energy applied for 1 second. pretty nifty, but seems to require an awful lot of power to make a small amount of mass.
How do you convert kilojoules to joules?
To convert from kilojoules to joules you have divide by 1000. meaning 1 kilo joule is equal to 1000 joules.
How do you convert from killi joules to joules?
To convert from kilo joules to joules you have divide by 1000 as 1 kilo joule is equal to 1000 joules. E.g. 2 kilo joules equals 2000 joules.
How many kilowatts are needed raise 480 tons of water by 10 degrees centigrade?
First, a kilowatt is a power unit equal to 1000 Joules per second. Raising water temperature, without specifying a timeframe is a question of how much energy is needed. You need to specify how fast you want to raise the temperature to get power kW. A tonne is 1000 kilograms, which is 10^6 grams, so 480 tonnes is 4.8 x 10^8 grams. It takes 1 calorie to raise a gram of water by 1°C, so it takes 10 x (4.8 x 10^8) calories = 4.8 x 10^9 calories. Taking 1 calorie = 4.1868 joules, we have 2.009664 x 10^10 joules, or 20.09664 gigajoules.
When 1000 joules of coal is burned it only produces 500 joules of electricity What happened to the other 500 joules of energy?
Heat losses from the boiler flue, turbines, etc. Losses in the alternators - it takes an appreciable power simply to rotate them at generating speed without any load. 50% efficiency is probably quite good!
How many joules are in 980 kilojoules?
1 Kilojoule is equal to 1000 joules. So, 980 kilojoules x 1000 joules per kilojoule = 980000 joules.
How many joules are there in 1j?
The "m" - lower case "m" - is short for "milli", meaning 1/1000.
How much work is needed for a 30 meter by 5 meter ramp with 200 newtons of force needed to push a 1000 newton piano?
5000 joules
Is power derived from energy?
Power = energy / time. For example, if a devices uses an ENERGY of 1000 Joules in 10 seconds, then during those 10 seconds it uses a POWER of 1000/10 = 100 Watts.
What is the heat equivalent to 4200 joules?
4200 joules = 1000 calories = kilocalorie
How you can convert kWh into joules?
1 KWh is 1000 joules- hours per second so you change hours to seconds to get; 1 KWh = 1000 x 3600 joules - sec per sec which is 3600000 joules.
How many joules are in a kilojule?
1000
Calculate number of joules in 1kwh?
1 Watt = 1 Joule/second 1 kilowatt = 1000 Watts = 1000 Joules/second 1 hour = 60 minutes = 3600 seconds 1 kWh = 1000 (Joules/second) * 3600 (seconds) = 3,600,000 Joules = 3.6 MJoules
