Questions from College Physics


Q: A radio wave with a wavelength of 1200 m follows two paths

A radio wave with a wavelength of 1200 m follows two paths to a receiver that is 25.0 km away. One path goes directly to the receiver and the other reflects from an airplane that is flying above the p...

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Q: An RC filter is shown. The filter resistance R is variable

An RC filter is shown. The filter resistance R is variable between 180 Ω and 2200 Ω and the filter capacitance is C = 0.086 µF. At what frequency is the output amp...

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Q: The eyepiece of a Galilean telescope is a diverging lens. The

The eyepiece of a Galilean telescope is a diverging lens. The focal points Fo and F′e coincide. In one such telescope, the lenses are a distance d = 32 cm apart and the focal length...

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Q: An electroscope consists of a conducting sphere, conducting pole, and

An electroscope consists of a conducting sphere, conducting pole, and two metal foils (see Fig. 16.10). The electroscope is initially uncharged. (a) A positively charged rod is allowed to touch the c...

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Q: At a point P, a distance R0 from a positive charge

At a point P, a distance R0 from a positive charge Q0, the electric field has a magnitude E0 = 100 N/C and the electric potential is V0 = 10 V. The charge is now increased by a factor of three, becomi...

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Q: Under what special circumstances can kelvins or Celsius degrees be used interchangeably

Under what special circumstances can kelvins or Celsius degrees be used interchangeably?

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Q: You are bicycling along a straight north-south road. Let

You are bicycling along a straight north-south road. Let the x-axis point north. Describe your motion in each of the following cases. Example: ax > 0 and vx > 0 means you are moving north and speeding...

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Q: A stretched string has a fundamental frequency of 847 Hz. What

A stretched string has a fundamental frequency of 847 Hz. What is the fundamental frequency if the tension is increased by a factor of 3.0?

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Q: Stan and Ollie are standing next to a train track. Stan

Stan and Ollie are standing next to a train track. Stan puts his ear to the steel track to hear the train coming. He hears the sound of the train whistle through the track 2.1 s before Ollie hears it...

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Q: Find the energy for a hydrogen atom in the stationary state n

Find the energy for a hydrogen atom in the stationary state n = 4.

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