Physics Unit 3, do you know the essentials?

The basis of what you need to know for the exam!

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  • Created by: Kavita :)
  • Created on: 26-05-11 13:37

1. What is an ultrasound?

  • A wave humans can hear
  • A wave above 10hz
  • A sound wave above 20,000 Hz
  • A ultrawave
  • A sound that humans cannot hear
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Other questions in this quiz

2. What does the term media mean?

  • The materials through which sound travels
  • The newspapers and the press
  • The rays of light which passes through objects

3. What can be calculated from the time intervals between two different media?

  • The speed at which they both are moving
  • The distance between the boundary and the detector (object)
  • The time taken to reach the media
  • The objects moving at a certain rate

4. What action should scientists take if they find evidence that ultrasonic waves are harmful?

  • Use ultrasonic waves
  • Carry out more research
  • Tell a doctor

5. What happens to ultrasound when it reaches the boundary between two different media and is NOT reflected?

  • It is reflected
  • It is refracted
  • It is absorbed and transmitted
  • It is diffracted
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Comments

Maddy

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thanks this was really good:) 100%! **

Kavita :)

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your welcome :)

Diamanti

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COULDN'T NUMBER 1 BE ANSWER 2 AND 5??

Sarah

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Could the answer to question ten also be The time taken to make one orbit ? Thanks

Kavita :)

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nope number 1 cannot be both :) and you need specifics for number 10 :)

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