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Electromagnetism

The generator at a power plant produces AC at 24,000 Volts. A transformer steps this up to 345,000 Volts for transmission over power lines. If there are 2,000 turns of wire in the input coil of the transformer, how many turns must there be in the output coil. Please show the work. thanks

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7857

OTA ID:

102959

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Electromagnetism

The wavelength of an electromagnetic wave is measured to be 600m. What is the frequency of the wave?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7858

OTA ID:

103642

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Electromagnetism

A piece of iron is heated with a torch to a temperature of 900K. How much more energy does it emit as blackbody radiation at 900K than it does at room temperature, 300K?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7859

OTA ID:

103139

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Optics

A ray of yellow light crosses the boundary between glass and air, going from the glass into the air. If the angle of incidence is 20 degrees, what is the angle of refraction?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7860

OTA ID:

103139

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Optics

When viewed through a magnifying glass, a stamp that is 2 cm wide appears upright and 6 cm wide. What is the magnification?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7861

OTA ID:

103144

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