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You do this experiment:
- Wear safety specs
- Weigh food (take the mass)
- Heat proof mat under food
- Measure 10cm3 water
- Measure the temperature of the cold water
- Let food catch light
- Put lighted food under test tube (water)
- measure temperature
Find the difference in the start temperature and the end temperature (oC)
Energy = Mass of water X a constant X change in temperature
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoIt is impossible to 'lose' energy. It is simply transformed from one form to another. Maybe you could explain the question better? I had a question where I had to calculate the 'lost energy':
A 90% efficient 2 kW water heater is switched on for a period of 5 hours. The energy lost will be
a) 1kWh
b) 2kWh
c) 5kWh
d) 9kWh
If the heater is only 90% efficient, it will be using 1800 watts efficiently and wasting 200 watts per hour. 200 x 5 hours = 1000 watts.
Wiki User
∙ 7y agoEnergy out divided by energy in give efficiency.
in general this could be seen as
N.eff = (effect as seen in practice or real situation) / (effect as theoretically calculated)
Wiki User
∙ 14y agoIdeally, energy content of any subject is equivalent to the "energy which is required to destruct the subject".
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What compares the energy output of a system with its energy input?
Is it's Energy Efficiency.
How do you calculate cooling coil efficiency?
Calculate condenser and coils
When was British Energy Efficiency Federation created?
British Energy Efficiency Federation was created in 1996.
What is the percentage of energy used to do work called?
The term EFFICIENCY is defined as useful work, divided by total energy expenditure.
What is the purpose of the CRC Energy Efficiency Scheme?
The CRC Energy Efficiency Scheme is aimed at improving energy efficiency, as well as cutting emissions in large public and private sector organisations.
How can you calculate the efficiency of an appliance in terms of power?
vague question. Efficiency in terms of energy = useful energy/total energy x 100 vague question. Efficiency in terms of energy = useful energy/total energy x 100
Explain efficiency and how to calculate it for different simple machines?
Efficiency means to calculate that is the machine is efficient enough to save your bill or use less electricity. To calculate the formula is:Efficiency = Energy output (what is the machine producing) divided by Energy input (what is the machine taking or using).
Calculate the efficiency of glycolysis if 12 kcal of energy are required to transfer energy from glucose to ATP?
0.11666666666666668
How do you calculate cost efficiency?
say energy costs 5 cents and the efficiency is 0.1kwh cost= 0.1kwh x 0.05 cost= o.oo5cents
How the efficiency of machine be obtained?
Efficiency is output power divided by input power. You somehow have to measure, calculate, or estimate both; the details will vary depending on the type of energy input and energy output.
How do you calculate efficiency and how is it expressed?
For efficiency, you have to consider the energy or work that you get out of the machine, compared to the energy or work that you put into the machine. Its what you get out, divided by what you put in. By multiplying the result by 100, you should then get the efficiency expressed as a percentage, which is the normal way of describe how efficient a machine or process is. efficiency = (Work out/Work in) x 100 Sometimes you are given the efficiency in a problem, but then have to calculate either the work out or work in, so then its just a case of rearranging the equation above.
How much energy does a motor convert to heat?
You can calculate the quantity of energy that a motor turns into heat with either one of these equations: Heat energy = ( 1 - efficiency of the motor) x (energy input to the motor) or Heat energy = ( 1 - efficiency of the motor) x (power input to the motor) x (running time)
What is the coal energy efficiency?
If it is burned - which is the way such fuels are usually used - the energy efficiency is the energy efficiency of a heat engine. The theoretical maximum efficiency is the Carnot efficiency; the real efficiency will usually be considerably less than that.
How do you calculate the efficiency of the car?
check here http://www.wonderhowto.com/how-to-calculate-cars-fuel-efficiency-mpg-084812/
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 do you calculate the efficiency of vapour absorption machine?
how to calculate the vapour absorption mechine efficiency and per TR steam consumption
How do you calculate cooling coil efficiency?
Calculate condenser and coils
