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ASHA 777 [7]
2 years ago
8

A ceiling fan operates at three speeds, using 120 v of electricity from the wall. At low speeds, it uses 0. 25 a. Calculate the

resistance needed to generate that current. Then in 1-2 sentences, describe how the resistance would change at medium and high speeds if larger currents are needed at those speeds. Your answer should include the calculated resistance and a sentence describing your reasoning.
SAT
1 answer:
wolverine [178]2 years ago
6 0

A) The calculated resistance needed to generate the current at low speed is; R = 480 ohms

B) Resistance at medium and larger speeds are;

At medium speed; R is less than that at low speed

At larger speed; R is less than that at medium speed.

A) We are given;

Voltage; V = 120 V

Current at lower speed; I = 0.25 A

Formula for resistance here is;

R = V/I

R = 120/0.25

R = 480 ohms

B) This means that if larger currents are required at higher speeds, it means that lower resistance would be required.

Similarly at medium currents the resistance will be lesser than that at lower speed but greater than that at larger speeds.

Read more on ohms law at; brainly.com/question/1220677

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answer

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--------------------------------------------------------------------------------------------------------------

1). An airplane starts at the level = 0 feet

It rose to the altitude = 21000 feet

It descends by the height due to clouds = 4329 feet

So the height of the airplane = 21000 - 4329

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After giving pass to a plane it ascends by the height = 6333 feet

Now the height of the airplane = 16671 + 6333

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Then the airplane descends again to give the pass to a airplane again.

Altitude after descending by 8453 feet = 23004 - 8453 = 14551 feet

Airplane is flying at 14551 feet.

2). Distance between the top of the mountain to the floor of the valley = 4392 feet

Valley is 93 feet below the sea level.

Therefore, the height of the mountain will be = 4392 - 93

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