Wave properties Quiz

Materials used to make spacecraft are chosen based on their properties. These properties include the ability to hold up under extreme temperatures. Look at the table that shows the specific heat of several materials commonly used in spacecraft.

Suppose you have 5.00-kg samples of each material listed in the table. You want to use one type of material in an area of the spacecraft that will become hot upon re-entry. Compare what you know about the materials in the table. Which material would you choose? Explain your answer.

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Answer explanation

In this case Beryllium would be the best choice for space tile manufacturing. Because the higher the specific heat the better the insulator. We want a better insulator to keep the heat form reaching the interior of the shuttle.

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Betty is sitting on her surfboard out in the ocean. She is waiting for the perfect wave to come along so she can ride it in to shore. As she waits, she notices that the waves roll by in patterns, or sets. As Betty waits, she counts the number of waves that pass her during a 1-second period; she counts just 1. She estimates that the distance between crests is 6 meters. Betty sees the perfect wave and begins paddling. She pushes herself up, stands on the surfboard and rides the wave all the way in to shore, a distance of about 60 meters. It takes her about 10 seconds to ride the wave in. There are two methods to calculate the speed of the wave based on the information presented. Explain which method you use and what is the wave speed?

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Answer explanation

The first way we can calculate her speed is utilizng the frequency of 1 wave per second or 1 hZ. It is then stated the waves are 6 m apart giving us our wavelength. Using the equation v=λƒ we take 6 x 1= 6 m/s.

The second way is using the equation speed= distance /time. She travels 60 m in 10 seconds 60/10= 6 m/s

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Compare the average motion of the particles in the three containers of water. Explain your answers. (Each breaker contains the same substance.)

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Answer explanation

Beaker C will have the greatest amount of average motion. One because it contains the most substance (200g) and has the highest temperature (60) which measures the average kinetic energy in a system. B would be second as it has more substance than A. Leaving A with the least amount of substance and sits at the lowest temperature.

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Label the parts of the wave below including the dotted line. You may list your answers.

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Answer explanation

1. 1. wavelength

2. 2. trough

3. 3. amplitude

4. 4. crest

5. 5. resting position

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NGSS.MS-PS4-1

Choose ALL the answers that pertain to electromagnetic waves.

• Visible light

• Ocean waves

• Sound waves

• Must have matter to travel

• Travels with or without a medium

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The section of spring closer together is known as a rarefaction.

• True

• False

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The diagram displays a Longitudinal wave/compression wave.

• True

• False

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Which of the following is a property of a mechanical wave? (Choose all that apply.)

• Travel through a vacuum

• Incidence

• Sound waves

• Amplitude

• Travel through a medium

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The sound wave frequency of an F-sharp in music is 370 Hz, and its wavelength is 0.93 m. What is the wave's speed?

• 34.4 m/s

• 344.1 m/s

• 397.9 m/s

• 300,000 km/s

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NGSS.MS-PS4-1

A worker is fixing a ladder at the community pool. Both the temperature of the water and the air is 68 degrees Fahrenheit. He bangs on the aluminum ladder with his steel hammer. There is a swimmer swimming in the pool while the man works. The worker begins to hammer even harder on the ladder. Explain how the waves change. Choose the words to complete the sentence. When the man hammers harder on the ladder, the waves created will have a greater__________ and will transfer more_________.

• Wavelength, matter

• Wavelength, energy

• Frequency, matter

• Amplitude, energy

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