If a CD player uses electricity at a rate of 14 W, how much energy does it use during an 9 hour day? Wh

Q: A light bulb transfers 80% of electrical energy into light energy, and 20% into heat energy. Is this…

A: SOlution: To determine if a light bulb transfers 80% of electrical energy into light energy, and 20%…

Q: Please help! Thank you! A 68.4-kg sky diver jumped out of an airplane at an altitude of 0.900 km.…

A: Given Data : The mass of the skydiver is given as m = 68.4 Kg. The height of the skydiver initially…

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: A 75-kg sprinter accelerates from rest to a speed of 11.0 m/s in 5.0 s. (a) Calculate the mechanical…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: When we shiver on a cold day, the heat produced by muscle tissue is a demonstration of…

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Q: Calculate the time taken by a 60 bulb to consume 3000 J of energy.

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Q: a typical adult uses about 2500 calories of energy each day. Use this fact to calculate the typical…

A: The expression for find average power is P=Et

Q: Assuming that the diet of an average Canadian consists of 2,000 food calories per day (1 food…

A: Given data :- diet of an average person Canadian = 2,000 food calories per day 1 food cal = 4200 J…

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

A: ANSWER :- The solution of this question is as followed   Power = {energy/time}   Power = {(294.3…

Q: C. Final, more energy when together. D. Final, more energy when apart. A. Initial, more energy when…

A: Electric potential is defined as the amount of work needed to move a unit charge from a reference…

Q: A person walks 1 km, turns around, and runs back to where he started. Compare the energy used and…

A: Energy and Power :

Q: What is the difference between when work is done by a system and when work is done on a system

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Q: An electric kettle of 2200 W is used for 1 min. How much electrical energy is used

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Q: C7 21.) If a hair dryer is rated at 1300 W, how much energy does it require in 6 minutes?…

A: Power=Work/time Work=Power X time

Q: 2.0 1.6 - 1.2 0.8 0.4 8 10 12 14 16 time/hr The image above is a neat copy of a photo of an…

A: Power versus time graph is given for the electricity sold to electricity company .Each box = 100 W…

Q: Energy c o s t s $ 0.053/kWAh. A toaster, rated at1.0 kWAh, is used for a total of 30 minutes per…

A: The kilowatt-hour (kWh) is the unit of energy equivalent to 1 kilowatt (kW) of power expended for 1…

Q: What is the total work done BY the system after traversing the path AEC? * - 405 J O - 1,620 J O -…

A: In the PV graph the work done is area under curve or mathematically it is written as W=P∆V where P…

Q: Which choice below that most simply describes the energy transformation occurs when gasoline makes a…

A: Energy transformation is defined as the process of changing energy from one form to another.

Q: Energy types 1, 2, 3, and 4 are, respectively, electric, kinetic, gravitational potential, and heat.…

A:

Q: 17. An energy efficient lightbulb, taking in 28.0 W of power, can produce the same level of…

A: Write the given data with appropriate variables. Here, P1 denotes the power of an efficient bulb,…

Q: 600 J of work are done on a system in a process that decreases the system's thermal energy by 400 J.…

A: Given that : 600 J of work are done on a system in a process that decreases the thermal energy

Q: Your hand is wrapped around a cold iron bar. Your hand has 1000 J of thermal energy before touching…

A: we know that the energy will flow from hotter surface to the colder one. hence the energy will flow…

Q: Q38. Q38. How much energy does a 150 W steam iron consume per second? O 15 W O 15 J O 150 J O 0.15 J

A: Answer  150 J

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: 4. A 30 W light bulb is left on for 8 hours overnight, how much energy was wasted? ANSWER THIS IN…

A: Given: Power P=30 W Time  t=8 hours=8×60×60=28800 s

Q: Suppose you have a 1000Wmicrowave that you need to run for 5minto heat up your dinner.1. How much…

A: Power "P" = 1000 W      Time "t"= 5 mins

Q: A(n) 82-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.1 s. (a) Calculate the…

A:

Q: My computer uses 15 W, if I run it for 3 hours how many Joules have I used?

A: Given:         Power used by computer = 150W       Time it's running = 3 hrs= 3× 60 × 60 sec…

Q: How many joules of energy is used from 2 100 W for 12 minute

A: Given: The power is 2100 W. The time interval is 12 minutes.

Q: The energy of 723 BTU is supplied to a blower per minute. How much power (in kW) is supplied for…

A: Given: The energy (E) of 723 BTU is supplied to a blower per minute. Introduction: The power (P) of…

Q: What is the work that a 45 W light bulb can do in five minutes? O 390 kJ O 13.5 kJ O 216 kJ O 160 kJ

A:

Q: how to know if work is done towards the system or done by the system

A: In simple words if we give energy to system then this means work done on the system. also this means…

Q: 43) The compressor in a refrigerator performs 580 J of work to remove 160 J of heat from the…

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Q: Your home electricity bill for this 30-day month is $84. The rate is 15 cents per kilowatt-hour. How…

A: Solution: Given that Electricity bill for month (30 days) = $84  rate is 15 cents per kilowatt-hour

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: 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: At a certain location, the solar power per unit area reaching Earth’s surface is 200 W/m2, averaged…

A: The solar power incident on the panel when the total area of the panel is A can be expressed as

Q: 8) A person consumes a snack containing 14 food calories (14 kcal). What is the power this food…

A: We have a food that is consumed containing an energy of E=14 cal=14×4.186=58.604 J which is to be…

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

A:

Q: In considering the energy supply for an automobile, the energy per unit mass of the energy source is…

A: Given data, Energy per mass of Hydrogen, EPMHy = 142 MJ/kg = 142×106 J/kg Energy per mass of Hay,…

Q: 18 20 A student uses an electric heater to raise the temperature of water. Fig. 20.1 shows some of…

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Q: How can a 50-W light bulb use more energy than a 1000-W oven?

A: A 50-W light bulb can use more energy than 1000-W oven when the time period of lightning of bulb…

Q: An elevator has an electrical power rating of 3.2 x 104 W.  If the elevator takes 42 s to move up 3…

A: The given data are: E=3.2×104 Wt=42 sh=12 mm=1800 kg Here, E denotes the electrical power, t denotes…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.