2000 * 30 * 9,8 joule
764400 joule
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.
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.
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.
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.
Q = 3 000 . 0,444 . ΔT (joules)ΔT is the difference of temperature.
(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.
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.
Greater or lower than what?
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.
1 000 000
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.
10, 000 years
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.
Hi
The ratio is greater than 1/1 000 000.
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.
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.