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What is the energy efficiency of a light bulb that gives you 30 units of useable energy for every 100 units of energy put into it?
Wiki User
∙ 12y ago
30%
Wiki User
∙ 12y ago
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What is the efficiency of a device that gives you 100 units of useful energy for every 100 units you put in it?
1
What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?
0.10, or 10%
What is the efficiency of an engine that gives off thermal energy?
anal probes
What is the most familiar form of energy?
the most familiar form of energy is chemical energy. every human uses chemica energy to digest their food into fuel that gives them energy to move around.
Is it possible to attain an efficiency of 100 percent in heat engines.explain?
A heat engine operating between 2 temperatures, Thot, the heat source, and Tcold, the heat sink, can be 100% efficient only when Tcold is absolute zero. Carnot worked out the equation to determine the best possible efficiency of a heat engine designed to produce mechanical energy ("Work") from heat energy: Wout = (Heat Energy in at Thot) x (Thot - Tcold)/(Thot) Note that (Thot - Tcold)/(Thot) is 1 only if Tcold is zero. In every other case, the ratio is less than 1. The amount of heat energy discharged to the heat sink at Tcold is: (Heat Energy in at Thot) - Wout. (You can work this out from the equation. It reflects the law of conservation of energy. ) This just means that all the heat energy absorbed by the heat engine is converted into either mechanical energy or heat energy at a lower temperature. No energy is lost and no extra energy is created. "Efficiency" according to Carnot's equation tells us the best possible ratio between these two energy outputs that nature allows a heat engine to achieve. You can think of a heat engine as a device that splits an amount of heat energy at some high temperature into mechanical energy and heat energy at some lower temperature. Kind Regards, Colin Dunstan Author: "cyclic heat to work conversion systems"
What is the efficiency of a device that gives you 100 units of useful energy for every 100 units you put in it?
1
What is the efficiency of a device that gives you 10 units of useful energy for every 100 units you put in it?
0.10, or 10%
What is efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
What is the efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
What is the efficiency of an engine that gives off thermal energy?
anal probes
What is the efficiency of a car if you put in 50 units of energy and it gives you 15 units of energy out?
15/50 = 30%
A motor produces less mechanical energy than the energy it uses because the motor what?
Yes this is what we call efficiency of the motor. We give 100 but the motor in turn gives 40, so its efficiency is 40%
What is the efficiency of an engine that gives off 70 percent thermal enery?
If this, ie 70%, is the total energy loss, it follows that the engine is producing 30% useful energy, so that is its thermodynamic efficiency.
Almost every energy transformation gives off what?
my guess is thermal energy ( heat )
What is released as one form of energy changes to another form?
Energy. Given that energy can be neither created nor destroyed, the total energy output equals that input, and in a system the ratio of that output energy desired to the total input gives the efficiency.
How does a cheetah require energy?
by eating more and hunting and that gives you the ability to work.that makes the energy for the cheetah or what every animal need is energy.
What is the main of energy for most processes at earth surface?
the sun because it gives energy to every living thing on earth
