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Cost of operating a heating element

A heating element draws 7.50 A on a 120V line. At the rate of 8.00 cents per kW h what is the cost of operation for 5.00 h?

Subject:

Physics

Topic:

Modern Physics

Posting ID:

3892

OTA ID:

101230

View Details $1.99 Download Add to Cart

Wheatstone bridge

Use Wheatstone bridge to determine an unknown resistance

Subject:

Physics

Topic:

Modern Physics

Posting ID:

3898

OTA ID:

103139

View Details $1.99 Download Add to Cart

Lorentz transformation and the Doppler effect.

The radar speed trap operates on a frequency of 10^9 Hz. What is the beat frequency between the transmitted signal and one received after reflection from a car moving at 30 m/sec?

Subject:

Physics

Topic:

Modern Physics

Posting ID:

3944

OTA ID:

103000

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Gravitational attraction between an electron and a proton in a hydrogen atom. first Bohr orbit of a hydrogen atom.

The gravitational attraction between an electron and a proton in a hydrogen atom is weaker than the coulomb attraction by a factor of about 10-40. An alternative way of looking at this fact is to estimate the radius of the first Bohr orbit of a hydrogen atom if the electron and proton were bound only by gravitational attraction. You will find the answer interesting!

Subject:

Physics

Topic:

Modern Physics

Posting ID:

3977

OTA ID:

102509

View Details $1.99 Download Add to Cart

Comparing Earth's g value to Mars.

Mars has a mass of 6.37x10^23 kg and a radius of 3.43x 10^6. What is its "g" value compared to that of earth?

Subject:

Physics

Topic:

Modern Physics

Posting ID:

3987

OTA ID:

103139

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