10 minutes maximum! Can you do it in 5?

Q1+2: In a small pool by the beach, 20 small water waves hit a rock every 5 seconds.

1. The frequency of the waves is....

  • A. 0.25 Hz
  • B. 0.25 s
  • C. 4 Hz
  • D. 4 s

2. The period of the waves is....

  • A. 0.25 Hz
  • B. 0.25 s
  • C. 4 Hz
  • D. 4 s

3. The time period of a sound wave with a frequency of 200 Hz will be...

  • A. 0.5 s
  • B. 0.2 s
  • C. 5 ms
  • D. 2 ms

4. Which of these is the correct formula for wave speed?

  • A. wave speed = frequency x amplitude
  • B. wave speed = frequency x wavelength
  • C. wave speed = wavelength x amplitude
  • D. wave speed = frequency x amplitude x wavelength

5. Which of these is the standard unit for wave speed?

  • A. m Hz
  • B. Hz / m
  • C. m/s
  • D. s/m

What are the missing values in this results table from experiments with water waves?

 Frequency Wavelength Wave speed
6. 2 Hz 8 m
7.
 0.1 Hz 10 m/s
8. 13 m 3.9 m/s
 

Q9&10.

A team of scientists are visiting a coastal area. They are considering building a power station using ocean waves. The waves typically have the following measurements:

  • Time period = 12 s
  • Velocity = 4 m/s
  • Amplitude = 0.8 m

 

9. What is the frequency of these waves?

  • A. 4.8 Hz
  • B. 0.25 Hz
  • C. 0.083 Hz
  • D. 2 Hz

10. What is the wavelength of these waves?

  • A. 0.33 m
  • B. 3 m
  • C. 3.2 m
  • D. 48 m
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Question 1:

Frequency = number of waves per second.

20 waves in 5 seconds=20/5=4 waves per second=4 Hz

Answer: C. 4 Hz


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
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Question 2:

Period T=1/frequency

Frequency = 4 Hz, so:

T=1/4=0.25 s

Answer: B. 0.25 s


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 3:

Time period T=1/frequency

T=1/200 Hz=0.005 s=5 ms

Answer: C. 5 ms


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 4:

The correct formula for wave speed is:

wave speed=frequency×wavelength

Answer: B. wave speed = frequency x wavelength


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 5:

The standard unit for wave speed is meters per second (m/s).

Answer: C. m/s


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 6:

We use the wave equation:

wave speed(v)=frequency(f)×wavelength(λ)

6. f=2 Hz, λ=8 m

v=2×8=16 m/s

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 7:

We use the wave equation:

wave speed(v)=frequency(f)×wavelength(λ)

7. f=0.1 Hz, v=10 m/s

λ=v/f=10/0.1=100 m

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 8:

We use the wave equation:

wave speed(v)=frequency(f)×wavelength(λ)

8. λ=13 m, v=3.9 m/s

f=v/λ=3.9/13=0.3 Hz

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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Question 9:

Frequency f=1/Time period

f=1/12≈0.0833 Hz

Answer: C. 0.083 Hz


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

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A.I. response
Our use of A.I. is environmentally friendly!
We do an A.I. search for each question, then store the response to that question on our server. No need to do multiple searches! Repeating the same A.I. request would have a much bigger carbon footprint.

Question 10:

Use the wave equation:

v=fλ⇒λ=v/f

We have v=4 m/s, f=1/12 Hz≈0.0833 Hz.

λ=4/0.0833=48 m

Answer: D. 48 m


*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.