An aluminum wire having a cross-sectional area equal to 2.70 x 10° m carries a current of 3.00 A. The density of aluminum is 2.70 g/cm. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire.

Q: What is power?  Calculate the power to move a 9 J box in 20 seconds. Calculate the power used for a…

A: 1. When the work is done in unit time, then the quantity is known as power. Power is also defined as…

Q: A form of energy that permits human eye to see.

A: The only one form of energy exists which permits human eye to see is light energy.

Q: Suppose you expand 500 J of energy running up the stairs for 10 seconds. How much power did you…

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Q: Materials that can generate electricity due to mechanical stress are called materials.

A: When a material is under mechanical stress, the positive and negative shifts towards the center of…

Q: How does a wind turbine produce electricity? (A) The spinning blades turn a shaft that connects to a…

A:

Q: Suppose you are using a see-saw with your friend. You have a weight of 500 N and your friend has a…

A: Given data: The weight of man is W=500 N. The weight of friend is W'=600 N. The distance of man from…

Q: Explain what it means for a force to do work on an object.

A: The work done is given by

Q: Explain the work you had done when running and walking in the stairs

A: Work done is defined as the product of the displacement (d) and the force acted in the direction of…

Q: Explain the transformation of energy in lifting a book from one level of a shelf to another.

A: Lifting a book from one level of a shelf to another.

Q: We define power as the amount of done in a given amount of

A: When work is done equal amount of energy is transferred or consumed. Power is defined as the rate of…

Q: Renewable energy sources are supposed to be better for the environment then why do people prefer to…

A:

Q: 7. A ball is raised 5.0 m off the ground and weighs 750 g. What is its potential energy? 750 grams =…

A: Mass of ball (m) = 750 g  = 0.75 kg  Height of ball above the ground (h) = 5 m

Q: If the interest rate is 10%, Julia could borrow up to $91. Select one: O True

A: Correct answer is true

Q: demonstrates a direct energy transfer? demonstrates a direct energy transfer? When the traffic…

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Q: In 3-phase power measurement using two wattmeter method , if one wattmeter reads 3 times the other,…

A: We know that power factor can be given as shown below.

Q: Why machines are never 100% sufficient

A:

Q: Which results in an increase in power?   A) doing more work in less time. B) doing less work in more…

A: Rate of doing work is known as power. The standard relation for the power (P) is given as,' P=Wt…

Q: The Sun puts out twice as much solar energy in 2 hours as it does in 1 hour. But the solar power of…

A: The Sun puts on twice as much as solar energy in 2 hours as it does in 1 hour. The solar power is…

Q: Define kilowatt-hour and state its value in SI unit?

A: Kilowatt-hour is the energy consumed by an electrical device of power 1 kilowatt for one hour.SI…

Q: All of the following refers to power, except the rate of doing work by a system

A: Poer is rate of doing work. P=Wt its unit is J/s or Watt. Change in energy per unit time is also…

Q: Suppose a 87.5kg sprinter acccerlates from rest to 11m/s in 3.1 s a)what is the power output in…

A: Mass (m) =87.5 kg Initial velocity (vi) = 0Final velocity (vf) = 11 m/s Time (t) = 3.1 s

Q: If the average household in a region consumes about 5,250 kWh of energy per year. In the region, the…

A: Given Avg energy consumption in an year =  5,250 kWh  Avg annual solar energy potential  per year…

Q: What is ‘renewable source of energy’ and why is it important?

A: To discuss: What is ‘renewable source of energy’ and why is it important?

Q: What is the efficiency of an out-of- condition professor who does 2.10 x 10^5 J of useful work while…

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Q: please draw the LOL diagram and write the energy model of ball + earth motion

A: LOL Diagrams are amazing and very simple at understanding the Conservation of energy. Please have a…

Q: Explain how you know there is work being done on an object?

A:

Q: Dimitris car has a fuel efficiency of 21 miles per gallon. His tank is full with 12 gallons of gas.…

A: The gas-filled in the car, V(volume) = 12 Gallons Fuel efficiency, η = 21 miles per Gallon   Total…