Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?

Q: What is the difference between energy and power?

A: S.No Energy Power 1 Capacity to do work Amount of work done 2 It is measured in Joules It…

Q: Why is it advantageous to use steam that is as hot as possible in a steam driven turbine?

A: Carnot equation for thermal efficiency is given by,

Q: Electrical energy is usually measured in kilowatts*hours, kWh. A watt is 1 joule per second. A…

A: UNITS AND DIMENSIONS

Q: Calculate the cost of running a 1.5-hp air conditioner straight for one day if energy costs…

A: Power is the rate of doing work. Its unit is watt in international system of unit. It can also be…

Q: The unit kilowatt-hour is a measure of(a) the rate at which energy is transformed.(b) power.(c) an…

A: kilowatt hour

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: A  typical incandescent reading lamp runs at 60W. If it is left on constantly, a) how much energy…

A: Given data:  Power (P) = 60 W = 0.060 kW Energy charges = 12.5 cents per kWh

Q: A large household air conditioner may consume 13.0 kW of power. What is the cost (in $) of operating…

A:

Q: By converting the power of loudspeaker,3700 000 Watt into kilowatt, we get

A: Power is defined as the ratio of work done and the unit time. It is generally represented by the…

Q: A 60W light bulb is used 12 hours a day and is 30% efficient. How many kJ are used to power this…

A:

Q: A space heater primarily converts electrical energy into O light energy O thermal energy O sound…

A:

Q: How much electric energy is delivered to a 60 W lightbulb if the bulb is left on for 2.5 hours?

A: Write the given values with the suitable variables. P=60 Wt=2.5 hr=2.5×3600 s=9000 s Here, P is the…

Q: Discuss the Law of Conservation of Energy

A: ( Law of Conservation of Energy ) Law of Conservation of Energy states that energy can neither be…

Q: Where does the work done go during the stretching of a wire?

A: Step 1Work done by a body is the measure of energy transfer when a force moves it through a…

Q: If you use a 1000-watt microwave oven for 20 seconds, how much work does it do?

A:

Q: Cadrudate the that datves af 24 m/s end. hoe 50000J et energy.

A:

Q: By converting the power of loudspeaker,3700 000 Watt into kilowatt, we get O a. 3700kW O b. 37000kW

A: This question is based on conversion of unit.

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

A: Given,

Q: Air Conditioner of rating 1500 W for ten hours each day Electric Freezer of rating 1300w each for 24…

A: power = I2 R

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

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: Which costs you more to run: An 800 W microwave oven for 2 minutes or a 60 watt bulb for in our?

A:

Q: How much work does a 5000 Watt clothes dryer do when you run it for 30 minutes? 30 minutes = 1,800…

A:

Q: this is a 23 watt energy efficient light bulb (1bulb) which cost 6.00.the retail price of…

A: The energy consumed by a device is given by E = P×t, where P = the power of the device t = time

Q: A 100 watt lightbulb consumes how many joules of energy in 1 second

A:

Q: What type of energy would a stationary book placed on a shelf that is 5m high have

A: Given: The book is placed on a shelf and the height of shelf from the ground is h = 5 m.

Q: Suppose you have a 1000W microwave that you need to run for 5min to heat up your dinner. How much…

A:

Q: What is the available energy content, in joules, of a battery that operates a 2.00-W electric clock…

A: Given data: Power, P=2.00 W Time taken, t=540 days

Q: A clothes dryer uses 3000 W and is run fro 1 hour. If the total useful energy to dry the clothes is…

A: Given: Power of the dryer P= 3000 W  time to use dryer = 1 hour  Total useful energy to dry the…

Q: How dependent on energy is our society? Why?

A:

Q: Which of the following would consume the least energy? a)A 60 W light bulb left on for an hour b)A…

A:

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: 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: higher watts can charge the battery

A: Wattage is the overall measurement of power that flows through your charger, so a higher cell phone…

Q: Calculate the amount of energy required

A: Energy required is 19400 Joules. Explanation is in next step.

Q: An electric heater of power 3 kW is used for 10 h. How much energy does it consume? Express your…

A:

Q: Which one of the following is the unit of energy?

A: the above

Q: A laptop computer consumes about 40 watts of electricity per hour when operating. At $0.20 per…

A: Given data:  Power (W) = 40 W = 0.040 kW Time (t) = 10 h Electrical cost = $0.20 per kWh Required:…

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

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

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.