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A vacuum uses input energy of 200 000 j to clean a carpet if 140 000 j of output energy is waste energy what is the efficiency of the vacuum?
This question means that 60 000 J is used usefully (this is used to produce the kinetic energy of the air flow that does the cleaning), so the ratio of useful energy to the total is 60/200 which is 30 percent. This is the efficiency of the device.
What is the height of 40000 kg exerts an energy of 420 000 J?
Use the formula for gravitational potential energy: PE = mgh Replace the numbers you know: energy (PE), mass, and a gravity of about 9.8. Solve the resulting equation for height. Since you are using standard SI units, the answer will be in meters.
How can you write this in scientific notation 300 000 000?
300 000 000 in scientific notation is 3.0 x 10^8.
How much energy does Canada consume in one year?
The United States is the largest energy consumer in terms of total use, using 100 quadrillion BTU (105 exajoules, or 29000 TWh) in 2005, equivalent to an (average) consumption rate of 3.3 TW. The U.S. ranks seventh in energy consumption per-capita after Canada and a number of small countries. The majority of this energy is derived from fossil fuels: in 2005, it was estimated that 40% of the nation's energy came from petroleum, 23% from coal, and 23% from natural gas. The remaining 14% was supplied by nuclear power, hydroelectric dams, and miscellaneous renewable energy sources.
How much energy does a nuclear reaction give off?
It depends on how much you are reacting, what element it is, and how quickly it reacts. But in all cases E=mc^2 Meaning that the energy (in Joules) released is equal to the mass lost (in kg) multiplied by the speed of light (300 000 000 m/s) squared.
What is the kinetic energy of a person on top of a tower e equals with a potential energy of 15000 joules?
(assuming no air resistance)potential energy translated to kinetic energy.you need some numbers in:potential energy = m*g*h = 15 000 jsay m = 100 kgsay g = 10 m/s^2 (approximation)then h = 15 000 / (100*10) = 15 metresso100 kg after falling 15 metres will have kinetic energy = 15 000 joulesKE = 0.5 * m * v^2so velocity) at base of tower :v =square root (15 000 / (0.5 * 100))v = 17.32 metres / secondso , potential energy lost = kinetic energy gained.
Is an electromagnetic wave of 300 000 000 000 000 000 000Hz associated with a greater or lower quantity of energy?
Greater or lower than what?
How many more times energy does uranium release compared to oil?
1 000 000
How is light powered?
This depends on the given wavelength; the range is between 700 nm and 1 000 000 nm. For 1 000 nm the energy of a photon is 1,9864.10e-19 J.
How long must nuclear energy be stored?
10, 000 years
A vacuum requires 200 000 J of energy to clean a carpet. If 60 000 J of energy is actually used to clean the carpet, what is the % efficiency of the vacuum Round your answer to the nearest percent?
Hi
Is heat a form of chemical energy?
No, it is thermal (heat) energy, converted from various sources. Most energy types can be compared by using heat energy equivalence. Example: the chemical energy potential bound in 1 pound of hydrogen gas is 62 000 btu of heat energy.
How powerful is infrared light?
This depends on the given wavelength; the range is between 700 nm and 1 000 000 nm. For 1 000 nm the energy of a photon is 1,9864.10e-19 J.
Do decibels vary linearly?
they vary logarithmically. that is by a logarithm of base 10.A2. Or to be more precise, our ears behave in a logarithmic scale.This is necessary, for they must respond to an energy range of 120 dB, or a range of 1 000 000 000 000.
How many smiley faces are there on Facebook?
4,000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, and 7
When was biomass energy first used?
about 750 000 years ago by the cave men
What is uranium production used in the nuclear energy?
Approx. 30 000 t/year.
