WAVES (PART 3)

Question 1

1. What are waves a sequence of?

Answer 1

• they are a sequence of simple harmonic oscillators
• each oscillator has the same amplitude and frequency

Question 2

2. Where is Potential Energy stored?

Answer 2

• it is stored in a mass- spring oscillator

Question 3

3. What can waves transfer?

Answer 3

• information
• energy
  (this transfer can damage our ears)

Question 4

4. What is the formula to calculate Potential energy?

Answer 4

PE = ½ . k . A²

PE = Elastic Potential Energy
A = the amplitude of the oscillation of the mass-spring
system

Question 5

5. What is the energy that is transmitted by a wave proportional to?

Answer 5

• it is proportional to the square of the amplitude of that
  wave

Question 6

6. What are two quantities that are related to energy?

Answer 6

• power
• intensity

Question 7

7. What is power a measure of?

Answer 7

• power is a measure of how much energy is transmitted
  per unit time

Question 8

8. What is intensity a measure of?

Answer 8

• it is a measure of how much power is present per unit
  area

Question 9

9. What is the calculation that connects intensity and power?

Answer 9

I = P / A

I = intensity in W/m²
P = power in Watts (W)
A = area in metres squared

Question 10

10. Answer this question?

Answer 10

B

Question 11

11. Answer this question?

Answer 11

B

Question 12

12. Answer this question?

Answer 12

B

Question 13

13. Answer this question?

Answer 13

• False

Question 14

14. Answer this question?

Answer 14

• B

Question 15

15. Answer this question?

Answer 15

• B

Question 16

16. Answer this question?

Answer 16

• A

Question 17

17. Read through Summary 1.
    Does everything make sense?

Answer 17

• yes

Question 18

18. Read through Summary 2.
    Does everything make sense?

Answer 18

• yes

Question 19

19. Read through Summary 3.
    Does everything make sense?

Answer 19

• yes

Question 20

20. Read through Summary 4.
    Does everything make sense?

Answer 20

• yes

Question 21

21. Read through Summary 5.
    Does everything make sense?

Answer 21

• yes