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physics 20

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Physics 20 Final Exam Review Quiz

Question 1 of 16

1

What is the speed of sound in the desert, where the temperature reaches 50°C?

Select one or more of the following:

  • 362 m/s

  • -

Explanation

Question 2 of 16

1

Mr. Willard yells at Mason with an intensity of 2.45 x 10^-6 W/m^2. What is this intensity measured in decibels?

Select one or more of the following:

  • 63.9 dB

  • -

Explanation

Question 3 of 16

1

A police car is pulling up to your parked car with its siren emitting a frequency of 1200 Hz. The police car is traveling 40m/s. What is the frequency you hear as it approaches you, if the speed of sound is 332m/s?

Select one or more of the following:

  • 1.36 x 10^3

  • -

Explanation

Question 4 of 16

1

At the beach, you notice that a wave hits the beach every 5.0 seconds, and each wave is about 15.0m apart. What is the speed of these waves?

Select one or more of the following:

  • 3 m/s

  • -

Explanation

Question 5 of 16

1

In the ocean, a wave crest 3.2m high meets a wave trough from another direction 2.6m deep. How high is the resulting wave?

Select one or more of the following:

  • .6 m

  • -

Explanation

Question 6 of 16

1

Two identical cars are driving toward one another sounding their horns. You're the driver of one of the cars. You measure your cars horn to be sounding at 512 Hz, but you measure the horn of the other car to be sounding at 600 Hz. The speed of sound is 345 m/s. If you're travelling at 26.8 m/s, how fast is the other car traveling?

Select one or more of the following:

  • 27.2 m/s

  • -

Explanation

Question 7 of 16

1

A piece of copper at 90°C is added to .200kg of water at 15°C inside an aluminum calorimeter that has a mass of 0.100kg. The final temperature of the copper, water, and calorimeter is 25°C. What is the mass of the copper piece?

Select one or more of the following:

  • 0.37kg

  • -

Explanation

Question 8 of 16

1

What is the temperature change when .10kg of water loses 2320 kJ of heat?

Select one or more of the following:

  • 5.52°C

  • -

Explanation

Question 9 of 16

1

A can of compressed air hold 0.500L. If it is heated up from 293.15K to 313.15K what size container would be needed to hold the new volume?

Select one or more of the following:

  • 0.534 L

  • -

Explanation

Question 10 of 16

1

What is the mass of a piece of silver that required100kJ of energy to melt it entirely into liquid?

Select one or more of the following:

  • 1.14 kg

  • -

Explanation

Question 11 of 16

1

A steel beam that is 24.00m is used in the construction of a new roof. If the roof is built when it is -10.00°C outside, how much room must be left if the temperature can rise to 35.00°C in the summer?

Select one or more of the following:

  • 1.296cm

  • -

Explanation

Question 12 of 16

1

The earth's circumference is approximately 40 000km. How long does it take light to travel around the Earth?

Select one or more of the following:

  • 0.13 s

  • -

Explanation

Question 13 of 16

1

Mercury is .40AU from the Sun. How much longer does light take to reach Earth than Mercury if the time for light to reach earth is 500s. 1 AU=1.5x10^11.

Select one or more of the following:

  • 300s

  • -

Explanation

Question 14 of 16

1

A 7.00cm object located 20.00cm from a mirror forms an image -10.00cm from the mirrors vertex.
Calculate the focal length and image size.

Select one or more of the following:

  • -20.00cm=f
    3.50cm=hi

  • -

Explanation

Question 15 of 16

1

How fast does light travel in a medium with an index of refraction of 4.50?

Select one or more of the following:

  • 6.67x10^7 m/s

  • -

Explanation

Question 16 of 16

1

If the refracted angle of light passing from water (n=1.330 into glass (n=1.50) is 28°, what s the incident angle?

Select one or more of the following:

  • 32°

  • -

Explanation

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