A refrigerator consumes 500 Joules electrical energy and removes 1000 Joules heat from the food inside it. How much heat (in Joule) does the refrigerator release into kitchen?

Q: If 100 J of heat is added to a system that does 40 J of external work, by how much is the internal…

A: Given Data: The heat energy added is, H = 100 J. The work done is, W = 40 J. Let ∆E be the change…

Q: In doing 15000 J of work, an engine rejects 9000 J of heat. What is the efficiency of the engine

A: The efficiency of the engine is, e=ww+Q

Q: What is the change in internal energy of a system in BTU if the system absorbs 250 J of heat and…

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Q: How much energy would you consume daily if you kept a lightbulb of 20 watts on all day long?

A: A lightbulb is rated as 20 Watt which is indicating the power of the bulb.  P = E/t  Power is…

Q: if your water heat has an efficiency of 95%, how much energy would it take to heat 45 kg of water…

A: The heat energy required to raise the temperature of the water is given by, Q=mcTf-Ti Here, m is the…

Q: An automobile engine operates with an overall efficiency of 12%. How much energy in gallons of…

A: The formula for the efficiency of the automobile engine is:

Q: How much energy is required to heat 50 gallons of water from 20C to 130F? Note the unit change.…

A: The required expression for the energy is,

Q: in a process , 850 j of heat is added to a system and 500 j of work is done by the system on its…

A: Work done by the system is 500J  To find the change in internal energy of the system

Q: A heat engine is 25% efficient. if the engine does 500 joules of work per cycle, how much energy is…

A: Efficiency of the heat engine,  Work done by the engine in a cycle,

Q: A proposed ocean thermal energy conversion (OTEC) system is a heat engine that would operate between…

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Q: The air inside a bicycle tire pump has 160J of work done on it as 56.4J of heat is added to it. What…

A:

Q: A solar panel receives energy from the Sun at a rate of 5.0kW. Thermal energy is transferred from…

A: Given energy rate is in person second and water supply is in per hour so we have to make these units…

Q: An electric heater is to heat 11 kg of oil per min from 4.5 deg C to 65.5 deg C. Specific heat of…

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Q: Strictly speaking, why will a refrigerator containing a fixed amount of food consume more energy in…

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Q: Assume that the cost of hydrogen per unit energy is the same as gasoline ($0.03/MJ). What is the…

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Q: Suppose a woman eats a 340 kcal cup of yogurt. How many minutes will the energy in the cup of yogurt…

A: The equation for the available energy or the output energy.

Q: A car running using a heat engine does 3.9 × 107 J of work. If the heat engine is 89 percent…

A: Efficiency can be expressed as

Q: A worker drives a 0.500 kg spike into a rail tie with a 2.50 ksledgehammer. The hammer hits the…

A: The expression for kinetic energy (KE) KE = 12× Mass (m) × {speed (v)}2

Q: 600 J of heat energy are transferred to a system that does 400 J of work. By how much does the…

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Q: What is the mechanical work output per cycle and thermal efficiency of an engine that takes 19 kJ of…

A: Please see the answer below.

Q: A key is placed in a hot oven and warmed to 100c. As a result

A: Given that the key is placed in a hot oven and warmed to 100 degree Celsius. Here air molecules are…

Q: The thermal energy of a container of helium gas is halved. What happens to the temperature, in…

A: The expression for average kinetic energy for a gas is KEavg=32kBT Average kinetic energy of a gas…

Q: A gasoline truck engine takes in 10,000 J of heat and delivers 2,000 J of mechanical work per cycle.…

A: Heat taken by engine: QH = 10,000J  Work done by engine: W = 2000 J

Q: A large bottle containing 950 g of water @6° C is removed from the refrigerator. How many kilojoules…

A: The amount of heat can be calculated using the following formula mentioned as below in eqaution no…

Q: Suppose a man does 34 kJ of work with an efficiency of 5.05 %. How much food energy, in…

A: Write the given values with the suitable variables. W=34 kJη=5.05%=0.0505Here, W is the work done…

Q: Which of the following devices converts electrical energy into mechanical energy? An example of such…

A: To find: The device that converts electrical energy into mechanical energy.

Q: What type of energy is created by the movement of particles (atoms) that produces heat? O thermal…

A: Required :: What type of energy is created by the movement of particles that produce heat.

Q: How much heat is added by the pump to 1 pound of the refrigerant and mustbe removed without doing…

A: We have to find that how much heat is added by the pump to 1 pound of the refrigerant and must be…

Q: 3.5x10^7 J of heat transfers into an engine. If 2.1x10^7 J of work is performed what is the…

A:

Q: A steam turbine takes in steam at a temperature of 400 oC and releases steam to the condenser at a…

A: temperature of the steam intaken = 400 C  = 673 K temperature of the steam released = 120 C  = 393 K…

Q: An electric blender is used to grind soya beans. The blender runs for 5 minutes, and the power…

A: Given, Running time (T) = 5 minute Power consumption = 100 W Heat loss = 20 W

Q: a car engine releases 325 J of heat and pushing the piston doing 400J of work. Does the system…

A: Given that, The heat released, Q = -325 J (Heat released is negative) Work done by the piston, W =…

Q: A solar panel receives energy from the Sun at a rate of 5.0kW. Thermal energy is transferred from…

A: Power,  P = 5 kW, time, t = 1 hour  mass, m = 15 kg  specific heat, c =4200J/kg C

Q: An 800-MW electric power plant has an efficiency of 30%. It losses its waste heat in large cooling…

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Q: How much heat is needed to produce 13 J of energy from a heat engine with an efficiency of 0.3? 3.9…

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Q: A typical photovoltaic cell delivers 4.0 × 10-3 W of electric energy when illuminated with 1.2 ×…

A: Efficiency is often measured as the ratio of useful output to total input.

Q: What is the difference between a refrigerator and a heat pump?

A: Refrigerator is used to freeze or chill the substances by maintaining low temperature in a freezer.…

Q: If 40 million Joules of energy is put into the hot reservoir and the engine transfers 22 million…

A: Given Data:- Energy put into the hot reservoir is QH=40 million Joules Energy transfered to the cold…

Q: A heat engine absorbs 1000 Joules heat from the hot source and releases 400 Joules to the cold…

A: The amount of work is done by the heat engine can be derived from thermodynamic first law.…

Q: A 3kW immersion heater is used to raise a 500g container of water from 20 degrees Celsius to 30…

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Q: A 100 watt light bulb runs for 120 seconds. How much energy does it use?

A: Power of the light bulb, P = 100 W Time, t = 120 s   The amount of energy used by the light bulb is…

Q: A new electric power plant has an efficiency of 37%. For every 100 barrels of oil needed to run the…

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Q: An engine is able to do 1000 J of work. How much heat would need to be added for it to be as…

A: Given:- An engine is able to do 1000 J of work. How much heat would need to be added for it to be as…

Q: How much stored energy (in Btu) is there when you heat 50 gallons of water from 60 °F to 150 °F?

A:

Q: If the average output of a solar thermal collector is 870 Watts, how long will it take (in minutes)…

A: Output power of the solar thermal collector P=870 W Volume of water V=3000 L=3 m3 The mass of water…