An average-sized home refrigeration unit has a 1/19−hp fan motor for blowing air over the inside cooling coils, a 1/25−hp fan motor for blowing air over the outside condenser coils, and a 0.16−hp compressor motor. (Note: 1.00 hp=746 W) ( /2)     (a) Working together, the three motors use electric energy at what rate? Answer: Energy = ____Watts   (b) If electricity costs $0.14/kWh, what is the cost of running the unit per hour? Answer: cost = ______$ .

Q: A refrigerator does 270,000 J of work in 30 minutes. How much power does it generate? 30 minutes =…

A:

Q: 5. Calculate the average speed of a 4.0 x 102-newton weight being lifted vertically by a 2.00 x…

A:

Q: How much work is done by 600 W electric toaster in 2.5 minutes? Group of answer choices 90 kJ No…

A: The amount of work done per unit time is know as power. P = W/t

Q: Suppose you have a clothes dryer that uses 4000 watts of power and you run it for an average of 1…

A: Given data: Power of clothes dryer, P=4000 W

Q: person lifted a bag of groceries 2.89 m from the floor onto a counter top using a constant force of…

A:

Q: A 60-hp electric motor (a motor that delivers 60 hp of shaft power at full load) that has an…

A: The expression for the electric power drawn by each motor and their difference,

Q: You place an ice cube in a microwave oven. If it requires 32,195 J to melt the ice cube and the oven…

A: The equation for the power delivered to the microwave oven. P = Q/t the power is directly…

Q: State the energy changes in the following cases: (a) loudspeaker (b) burning coal (c) bio gas burner…

A: Answer-aIn case of loudspeaker the electrical energy is transformed into sound energy in the form of…

Q: Lightbulb A was found out to give 30.0W of power, producing the same brightness as lightbulb B…

A:

Q: An electric kettle of 2200 W is used for 1 min. How much electrical energy is used? (A) 2200J B)…

A: Given Data, Power of the electric kettle (P)=2200 W Time (t)=1 min

Q: Rank the following four devices by the energy they use for the time period given, from highest to…

A: Electrical energy is given by the product of power and time.

Q: The “Energy Guide” label on a washing machine indicates that the washer will use $85 worth of hot…

A: Given,

Q: A large household air conditioner may consume 15.0 kW of power. What is the cost of operating this…

A: The total time in hours for which the air conditioner operates is

Q: An elevator has a mass of 600kg, not including passengers.  The elevator is designed to ascend, at a…

A: Given information: The mass of the elevator, m=600 kg The power supplied to the elevator, P=40 hp…

Q: A large household air conditioner may consume 14.0 kW of power. What is the cost of operating this…

A: Unit of power=KiloWatt=KW Unit of Time=hour Power=Energy/time Energy=Power X time Unit of energy is…

Q: laptop cost to operate for 10 hours

A:

Q: How much energy is used in 20 minutes of listening to music on an mp3 player that uses 9 watts of…

A:

Q: A 75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be…

A:

Q: One of these units are not power unit Watt N.m\s Joule-second O hp O

A:

Q: 27. How much power is required to do 18O J of work in 2.4 s?* O 432 J O 432 W O 75 J O 75 W

A:

Q: A car generating a power of 92041.43watts is traveling on a road with a coefficient of kinetic…

A: From Newton's law Fnet=Fapp-FfPv=ma-μkmgma-μkmg=Pvma-μkg=Pvm=Pva-μkg

Q: Lightbulb A was found out to give 30.0W of power, producing the same brightness as lightbulb B…

A:

Q: Complete the energy transformation/conversion taking place below. First item is done for you. 1.…

A: To find = To complete the energy transformations that are given .

Q: Here is an extract from our electricity bill. The coloured text has been added to highlight the…

A: Energy used from company = 294.3 kWh  Number of days = 92 days

Q: 68. What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is…

A: Given data: Power (P) = 3.00 W Time (t) = 1 year Cost of electricity = $0.0900 per kW.h Required:…

Q: The energy consumed by 2 kW electric motor for 1 minute is Blank 1 Joules.

A: Power of electric motor: P = 2 kW = 2000 W Time interval: t = 1 minute = 60 s

Q: A pumped-storage reservoir sits 144 m above its generating station and holds 7.0×109 kg of water.…

A: Given that, mass o the water is 7*10^9 Kg and height is 144m and power is 341MW and time is 6.1…

Q: If a hair dryer is rated at 1750 W, how much energy does it require in 6 minutes

A: Consider the energy consumed by the dryer in hour is, E=Pt Here, P is the power consumed and t is…

Q: 20. A small electric motor is used to raise a weight of 2.0 N through a vertical height of 80 cm in…

A: Given : W = 2.0 N h = 80 cm = 0.80 m t = 4 s e = 20% = 0.20

Q: A 2500-W electric motor raises a 500-kg sack from a height of 2.0 m to 24.0 m in 50 s. The…

A:

Q: In unloading grain from the hold of a ship, an elevator lifts the grain through a distance of 12 m.…

A: Given,height of the elevator, h = 12 mgrain is discharged at the top of the elevator at a rate of,…

Q: how much work per cycle does it deliver?

A:

Q: Your exercise regime is running up a flight of stairs every morning. If it takes you twice as long…

A: To Determine Work done

Q: How long will the 4-kW rice cooker run on 3.6x10^6 J of energy?

A: Power×time=Energy≡4×103W×time=3.6×106J≡time=3.6×106J4×103=900s900s=900s60=15minutes

Q: If a CD player uses electricity at a rate of 18 W, how much energy does it use during an 9 hour day?

A: To find the energy used by the CD player in a 9 hour day

Q: What type of energy is equal and opposite to the work done by gravity?

A:

Q: A heat turbine can generate a maximum power of 250 MW. How much work can the turbine do in 7.8 min?

A: Given Power of turbine = 250 MW Time taken = 7.8 min We have to calculate work done by turbine…

Q: The weight of the elevator in an Adamson University building is 4000Newtons. A 20,000Watt motor…

A:

Q: A ceiling fan at maximum speed consumes energy at 64.7 Watts and is used from 9:00 pm to 6:00 am.…

A:

Q: A 60 kg woman runs up a flight of stairs having a rise of 4.5 m in a time of 4.3 s. What average…

A: Dear student The average power is defined as Force × Velocity Basically Power is work done per unit…

Q: Why do the brakes on my truck get hot when I use them? Where is all that energy coming from?

A:

Q: Electric cars convert approximately 60% of the energy stored in their batteries into vehicle…

A: Given: Mass of the electric car, m = 2200 kg. Initial velocity of the car, u = 0. Final velocity of…

Q: a 100 W electric motor has an efficiency of 68%, how long will it take to lift a 40kg object to a…

A:

Q: A typical desktop personal computer uses around 100 W of power when carrying out intensive…

A: Given : P = 100 W t = 90 minutes = (90)(60) = 5400 seconds

Q: When driving from home to the grocery store you are using the chemical potential energy in the…

A: