Which costs more, running a 2,000-W hair dryer for 3 min or leaving a 40-W lamp on overnight (10 h)?

Q: A compact fluorescent lamp (CFL) uses less energy than its equivalent incandescent bulb. How much…

A: Power of CFL = P1 = 20 W Power of incandescent lamp = P2 = 100 W Price of electricity = PE = P…

Q: A compact fluorescent lamp (CFL) uses less energy than its equivalent incandescent bulb. How much…

A: Energy is defined as the ability to do work. This implies that a body having higher energy can do a…

Q: maximum energy that can be transferred

A:

Q: A typical candy bar contains approximately 250kcal. How long would this power a 60 W lightbulb?

A: Convert kilo calorie to joule. E=250 kcal4184 J1 kcal=1.046×106 J The relation between power and…

Q: An electric clothes dryer is rated at 2,200 W. How much energy does it use in 45 min?

A: Write the formula for power.

Q: Which is not a unit of power? a.joule per second b.kilowatt-hour c.Newton-meter per second…

A:

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

A:

Q: How much does it cost to run a 1500-W hair dryer for 27 minutes each day for one month (30 days) at…

A:

Q: 7. A 60W light bulb runs for 3 hours, how much electrical energy has it used?

A: Power = P = 60 W time = t = 3 hours = 3 x 3600 = 10800 s energy = E = ?

Q: If electricity costs 7.06 cents/kWh, how much would it cost you to run a 120W stereo system 4 hrs…

A: In given this question ,Electricity cost a 7.06 Centet kwhSystem consumed power = 120 WRunning time…

Q: How much does it cost to run a 1500-W hair dryer for 29 minutes each day for one month (30 days) at…

A: Total Power ( P ) = 1500 W = 1.5 kWatts Time = 29 minutes each day for 30 days Total Minutes of…

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: Which costs more, running a 1,200-W hair dryer for 5 minutes or leaving a 60-W lamp on overnight?

A: Write the expression for energy consumed by each object .

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: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

A:

Q: ow much does it cost to run a 1500-W hair dryer for 15 minutes each day for one month (30 days) at a…

A: Given Power of hair dryer is P= 1500 W Time taken is t=30(15 min) =450 min=7.5 hours

Q: 13. Which is not a unit of energy? O Newton O Joules O Ergs O kilowatt - hr

A: Newton is unit of force Joules  is unit of energy  SI unit Erg is unit of energy in cgs unit…

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: The cost of electricity varies widely throughout the UnitedStates; $0.120/kWh is a typical value. At…

A: Given:Cost of electricity = $0.120 per kWh

Q: 1000 w heater is used 6 hours daily and the cost of 1 unit of electricity is 40 p. how much will it…

A: November has 30 days In a month, number of hours heater power is consumed is : 30 x 6 = 180 Hours…

Q: What kind of electricity does a computer consume?

A: To discuss the kind of electricity that a computer consume.

Q: What comes to your mind when you hear the word energy?

A: The first thing that comes to the mind on hearing the word "Energy", is the strength needed for…

Q: A microwave oven has a power requirement of 1,243 W. A frozen dinner requires 5.6 min to heat on…

A: The energy consumed by the oven can be obtained as E=Pt=1243W×1kW1000W5.6min×1h60min=0.116kWh

Q: An air conditioner, 6400 watts, is used only 4 months out of a year. On a typical day it is used…

A: We first convert the wattage to kilowatts and then use hours operated everyday to find the number of…

Q: Which of these is a unit of power and which is a unit of energy—a watt, a kilowatt, a kilowatt-hour?

A:

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

A:

Q: The rate at which electric work is done called

A: The rate at which the work is done is called power. The unit of power is watt.

Q: . An electric water heater requires 1100 W of power. Electricity costs 8 cents per kilowatt hour.…

A: Given Power of an electric heater = P = 1100 W = 1.1 kW Cost of electricity = 8 cents/kWh We have to…

Q: The cost of electricity in Saskatoon is currently about 16.35 cents/kWh (including carbon tax). At…

A: Given Data Cost of electricity is given as 16.35 cemts/kWh Power of the porch light is Pl=80.0 W…

Q: - Instruments that employing to measuring power of electricity is called--- ) Energy meter b)…

A: Option e) Wattmeter is correct

Q: If you have an average of 6.5 hours of online class per day for 204 days of school per year, how…

A: Given: The power consumed by the laptop is 90 W. The time is 6.5 hr for 204 days. The rate of cost…

Q: A 40 Watts bulb is used for 12.5 hours everyday for 30 days. Calculate the consumption of electrical…

A: Given:Power=40 wtTime = 12.5 hr=12.5 x30 days=375 hours

Q: How fast does electricity travel?

A: Electricity or electromagnetic signal is travels with speed nearly equal to the speed of light.…

Q: Cost of Electricity A refrigerator is an appliance that is left running all the time. In New…

A:

Q: A 100 watt light bulb has been left on for 20mins. How much work was done? (Reminder 1 watt= 1…

A: In the light bulbs work done is the form energy transfer from one place to another place. The light…

Q: in physics, called power is which is difFined as the quantity a

A: Since, it is known that unit of Energy is kg.m2.s-2. Also power is defined as rate of doing work.…

Q: a typical incandescent reading lamp runs at 60 watt. if it is left constantly, how much energy in…

A: Power (P) of a lamp = 60 W Time = 1 day

Q: What is the efficiency of an electric motor that produces 1/3 horsepower (about 250 W) of useful…

A:

Q: Given 150 kWh of electricity and assuming 30% losses, how much work, in joules, could be done?

A:

Q: A 1500 W portable heater will use 1.5 kW per hour. In 4 hours, it would use Watts?

A:

Q: A clock consumes 1.5 W of electrical power. How much energy does it use in each day?

A: In a day there are 24 hours, therefore, total time (t) in seconds will be,

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

A: The expression for energy in terms of power is,

Q: What is the efficiency of an electric generator that produces 1.75 kwh per kg of coal burned. The…

A: Given data The electric power produced by the electrical generator is: E = 1.75 kWh/kg The heat of…

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.