A Kettle Transfers 6,000J Of Energy Electrically. 1,500J Of This Is Wasted. What Is The Efficiency Of This Kettle? Give Your Answer As A Percentage. (2023)

1. Answer in Molecular Physics | Thermodynamics for Sadie M ...

  • Jun 1, 2020 · A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted. What is the efficiency of this kettle? 1. Expert's answer. 2020-06 ...

  • A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted. What is the efficiency of this kettle?

Answer in Molecular Physics | Thermodynamics for Sadie M ...

2. A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted ...

  • May 8, 2022 · A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted. What is the efficiency of this kettle in percentage? Video Answer.

  • VIDEO ANSWER: In this problem, first time calculating the value of use full power transport, let it be you. P. U. P. Is equal to use full power transport which…

A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted ...

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4. A kettle transfers 6,000J of energy electrically. - Gauthmath

  • Answer: 75%. Based on the given conditions, formulate:: 6000 - 1500 / 6000Calculate the sum or difference: 4500/6.

  • Answer to A kettle transfers 6,000J of energy electrically. 1,500J of this is wasted. What is the efficiency of this kettle? Give your answer as a percentage.

A kettle transfers 6,000J of energy electrically. - Gauthmath


  • Part of the energy input is wasted. ... It is defined in the same way as the efficiency of an energy conversion device: COP = Useful energy output. Energy input.

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  • A hairdryer transfers energy electrically from the mains to the thermal energy ... Calculate the efficiency of the kettle. Useful = 6000 J. Total = (6000 + 1500) ...

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  • This is a good strategy as it helps you set out your answer in a clear and logical manner. ... a kettle is used to boil water, the element will heat up the water ...

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  • b) Efficiency of energy transfers % Efficiency Energy transfer large ... Give your answer to three significant figures. [2] (iv) Suggest one reason why the ...

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How do you calculate energy conversion efficiency? ›

A formula for energy efficiency is the amount of useful energy obtained from a conversion divided by the energy that went into the conversion (efficiency = useful energy output / energy input).

What is the efficiency of coal to electricity? ›

Coal power plant efficiency is very similar to nuclear, with a typical U.S. coal plant operating at 32% to 33% efficiency. There are two different types of natural gas power plants — simple cycle and combined cycle.

How do you calculate the efficiency of a nuclear power plant? ›

To express the efficiency of a generator or power plant as a percentage, divide the equivalent Btu content of a kWh of electricity (3,412 Btu) by the heat rate. For example, if the heat rate is 10,500 Btu, the efficiency is 33%.

What is the maximum energy efficiency? ›

Generally, energy conversion efficiency is a dimensionless number between 0 and 1.0, or 0% to 100%. Efficiencies may not exceed 100%, e.g., for a perpetual motion machine. However, other effectiveness measures that can exceed 1.0 are used for heat pumps and other devices that move heat rather than convert it.

How to calculate percentage? ›

To do this, divide the number of marks by the total number of marks possible. For example, if you have 80 out of 100 marks, your fraction would be 80/100. You can then convert this to a percentage by multiplying by 100. In this example, 80/100 would become 0.8 x 100, which is equal to 80%.

What is the formula for efficiency factor? ›

Efficiency factor is also referred to as (R/U) rentable/usable factor or core factor. To compute for it, divide the rentable square footage by the usable square footage.

What is the net heat rate formula? ›

Net Heat Rate = (total fuel input to the boiler - the fuel that would be required to generate the steam to process assuming the same boiler efficiency)/steam turbine electric output (kW).

What is the formula of heat rate? ›

Rh = Ws × c × ΔT

Rh = The rate of heat in btu/hr, Ws = In lb/hr steam flow, c = btu/lb degree F specific heat capacity. ΔT = the difference in degrees Fahrenheit.

What percent efficiency is nuclear energy? ›

Nuclear Power Compared to Other Types of Energy

Nuclear power is already one of the most efficient types of energy available today. An average capacity factor of 91 percent beats other energy forms by a substantial margin. Natural gas produces an average of 50 percent while coal produces energy at almost 59 percent.

What is the efficiency ratio of nuclear energy? ›

The U.S. nuclear power fleet has achieved an average annual capacity factor of at least 90% in every year since 2012. The nuclear capacity factor averaged 93% in 2021.

What is the formula for power plant? ›

The power developed is given by the expression, P=WQHη × KW. Important Points A hydroelectric power plant is the highest efficient power plant.

What has 100% efficiency? ›

A simple machine, such as a lever, pulley, or gear train, is "ideal" if the power input is equal to the power output of the device, which means there are no losses. In this case, the mechanical efficiency is 100%.

Why is efficiency always 100%? ›

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent.

Why is maximum efficiency 50%? ›

The power Ps generated by the voltage source V is therefore Ps = iV = P + P′ = V2/(2RL). Under matched conditions, therefore, half the power generated by the source is delivered to the load and half is lost or dissipated by the source. The efficiency of maximum power transfer is, consequently, only 50%.

What is the equation for energy conversion? ›

The equation developed by Albert Einstein, which is usually given as E = mc2, showing that, when the energy of a body changes by an amount E (no matter what form the energy takes), the mass (m) of the body will change by an amount equal to E/c2.

How is the energy efficiency ratio EEF calculated? ›

The meaning of an EEF refrigerator's rating is how efficiently it uses its power. The higher the rating, the more efficient the refrigerator. An EEF rating comes from a mathematical formula, dividing total storage volume in liters by its energy consumption in kilowatt-hours per 24 hours (kWh/24h).


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