A homeowner buys a new refrigerator and a new air conditioner. Which one of these devices would you expect to have a higher COP? Why?

Q: How entropy is associated with messy bedroom?

A: Define entropy. Entropy is the quantity of thermal energy per unit temperature of the given system…

Q: A 2 ohm heater takes 5 amperes while submerged in 1400 grams of water contained in a vessel with a…

A:

Q: Compare the cost to make 48 kg of ice using two different refrigerators; one has a COP of 5.00 and…

A:

Q: How many calories are developed in 1.0 min in an electric heater which draws 5.0 A when connected to…

A: Given that, Time(t)= 1 m= 60 s Current (I)= 5 A Voltage (V)= 110 v From ohm's law V= IR Where R is…

Q: What is the difference between a refrigerator and an air conditioner?

A:

Q: How gas generator work?

A: Generators don't actually create electricity. Instead, they convert mechanical or chemical energy…

Q: How much does it cost to run a refrigerator all day for 6 months (30 days/month) if it requires 3.5…

A: Power is defined as the rate at which the work is done per unit of time. Higher power means having a…

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: What will happen to the temperature of a kitchen if the refrigerator door is left wide open for a…

A: Introduction : How a normal refrigerator works (when the door is closed) :Refrigerator work as heat…

Q: u are trying to help a friend calculate their utilization rate for their study time. They can…

A: utilization rate =[ number of problem in present hour/maximum problem rate] ×100

Q: Consider a water pipe that branches into two smaller pipes. If the flow of water is 10 gallons per…

A: The flow of water in main pipe,

Q: During the early stages of the design of a modern electric power generation plant, you are in charge…

A: Given that----- cooling rate = 2 GW. Increased temperature = 15°F. Question ❓  estimate the flow…

Q: where do you place the coils in a refrigerator

A: Condenser coils are used to remove the excessive heat from refrigerator so that it can remain cool .

Q: In a household during a particular week three 2kW fires are used on average 25 h each and eight 100W…

A:

Q: When ____ is added to a system, some of the energy stays in the system and some of the energy leaves…

A: Answer:-  Heat energy  When heat energy  is added to a system, some of the energy stays in the…

Q: When an electric company can’t meet its customers’ demand for electricity on a hot summer day,…

A:

Q: (i) Electrical Energy(in kWh) consumed by four Air conditioners of rating 1800 W for 12 h of each…

A:

Q: Does a photovoltaic cell obey Ohm’s Law? Explain briefly

A: photo voltaic cell is the one which can generate electricity when the light of suitable frequency…

Q: Consider a 24-kW hooded electric open burner in an area where the unit costs of electricity and…

A:

Q: A typical candy bar contains approximately 250. kcal. How long would this power a 60.0W lightbulb?

A:

Q: Which has more entropy: (a)  a pile of bricks, or the resulting house;

A: Entropy is a measure of disorder and entropy increases when a thermodynamic system goes from an…

Q: A 84 W freezer has an EER of 12.7. How much heat is exhausted to the room in 2.5 hours? |(include…

A: EER = 12.7 P = 84 W t = 2.5 hours t = 2.5 * 60 * 60 t = 9000 seconds

Q: A small vegetable shop use the following electric appliances: (1) Two Air Conditioner of rating 1800…

A: (i) Rating of n=2 air conditioners P=1800 W=1.8 kW for t=10 h. (ii) Rating of n=2 heaters P=500…

Q: If there were no process, then there would be no need for ____ in a system.

A: To determine: What happens if there were no process in a system

Q: 3. The motor unit A is used to elevate the 300-kg cylinder at a constant rate of 2 m/s. If the power…

A:

Q: Which has more entropy, a column of smoke as it initially leaves a burning logor the same smoke…

A: Required :: Which has more entropy.

Q: Calculate the energy cost of an electroplating process running at 0.51 V and 26.1 A for 3782 s…

A: Power P is given by, P = I V where I is current and V is voltage. Now, energy E=Power×Time Given,…

Q: Some appliances are double insulated what does that mean?

A: Some appliance are double insulated because of safety purpose

Q: Calculate the number of kilowatt-hours (kW-hrs) consumed in a week by two 60-Watt incandescent light…

A:

Q: What is the physical explanation for the loss in entropy?

A: Physical Explanation of Entropy Entrpy is a measure of randomness of any system or associated with…

Q: Electric power is to be generated by installing a hydraulic turbine–generator at a site 70 m below…

A:

Q: How does the heat emitted by lamps affect their efficiency?

A: A light bulb converts the electrical energy to light energy. The most efficient electric bulb would…

Q: What changes would allow your refrigerator to use less energy to run?

A: A refrigerator is a kind of a heat pump. A heat pump extracts the heat from a cold reservoir with…

Q: Illustrate the connection between entropy and disorder? Give an example?between entropy and…

A: In statistical mechanics entropy is an extensive property of a thermodynamic system which quantifies…

Q: Consider a building whose annual air-conditioning load is estimated to be 40,000 kWh in an area…

A: The decision to buy an efficient air-conditioner is taken by comparing the life cycle cost analysis…

Q: A 4-m _ 5-m _ 6-m room is to be heated by a baseboard resistance heater. It is desired that the…

A:

Q: What is the cost of operating a 84.87-Watt freezer for a month if the cost of electricity is $ 0.04…

A: We know that power is given by P= E/t Where E- energy            t- time Given P=84.87W…

Q: Many decisions are made on the basis of the payback period: the time it will take through savings to…

A: The energy cost, $ 1.0 per MJ   Insulation cost, $ 4.0 per m2   Surface area, A=150 m2   The heat…

Q: The approximate number of Fridges in Italy is 90 thousand. If each is on standby for about 2 hours…

A: Number of fridges = 90 thousand standby hours each day = 2 hours Power consumed by fridge while on…

Q: ecu Tor

A: Answer

Q: . Based on your understanding, please explain why entropy is decreases with an increase in…

A: There is relation between temperature and entropy but whether it decreases, increases or remains…

Q: Find the network output of the thermodynamic cycle (1-2-3-4-5-6-1) shown in the figure below.

A: The net work output of the given cycle can be represented as, From the given PV diagram, processes…

Q: The input power to operate a boiler comes from an electrical circuit with a voltage of 110 volts [ V…

A: V = 110 VR = 3 ΩPout = 70 kJ/min Pout = 7060 kJminminsPout = 1.167 kJ/sPout = 1167 J/s

Q: If the voltage and current are reduced by a factor of 2 each, for how much time must the goose be…

A: Power in electric circuit is given by,  P=VI Heat Energy by electricity is given by,   P=Et E=VIt It…