Q: If a tuning fork vibrates at 440 Hz, what is the period of the sound wave it produces?

$$T = \frac{1}{440} \text{ s}$$

Q: A sound wave travels through air at a speed of $$340 \text{ m/s}$$ and has a frequency of $$170 \text{ Hz}. $$What is its wavelength?

$$\lambda = \frac{340}{170} = 2 \text{ m}$$

Q: A dolphin uses echolocation to find fish underwater. If the speed of sound in water is $$1500 \text{ m/s}$$ and the echo returns in $$0.2 \text{ s}$$, how far away is the fish?

$$\frac{1500 \times 0.2}{2} = 150 \text{ m}$$

Question 1

Which of the following best describes the difference between qualitative and quantitative scientific data?

Accepted Answer

Qualitative data describes characteristics or qualities, while quantitative data involves measurements and numbers.

Question 2

A scientist investigates how the volume of air affects the time a candle burns. Which type of graph is most appropriate to display the results?

Accepted Answer

Scatter graph

Question 3

In the burning candle experiment, the relationship between the volume of air and the time the candle burns is best described as:

Accepted Answer

Direct proportionality

Question 4

Which of the following is a mixture rather than a compound?

Accepted Answer

Air

Question 5

What is the main factor affecting the profitability of mining a metal from an ore?

Accepted Answer

The cost of extraction compared to the value of the metal obtained

Question 6

A mining company wants to extract gold from an ore. If the ore contains 2 kg of gold per 1000 kg of ore and the cost to process 1000 kg is $500, what is the cost per kg of gold extracted?

Accepted Answer

$$500 \div 2 = 250$$

Question 7

Which animal uses sound waves reflected from objects to navigate and find prey, a process known as echolocation?

Accepted Answer

Bat

Question 8

The pitch of a sound is determined by which property of the sound wave?

Accepted Answer

Frequency

Question 9

If a tuning fork vibrates at 440 Hz, what is the period of the sound wave it produces?

Accepted Answer

$$T = \frac{1}{440} 	ext{ s}$$

Question 10

Which of the following best explains why sound cannot travel in space?

Accepted Answer

Sound waves require a medium (such as air) to transfer energy, and space is a vacuum.

Question 11

A sound wave travels through air at a speed of $$340 	ext{ m/s}$$ and has a frequency of $$170 	ext{ Hz}. $$What is its wavelength?

Accepted Answer

$$\lambda = \frac{340}{170} = 2 	ext{ m}$$

Question 12

Which part of the human ear is responsible for converting sound vibrations into electrical signals?

Accepted Answer

Cochlea

Question 13

What is the main function of the pinna in the ear?

Accepted Answer

To collect and channel sound waves into the ear canal

Question 14

Which animal has the widest hearing range according to the provided chart?

Accepted Answer

Bat

Question 15

Ultrasound is used in medical imaging because:

Accepted Answer

It can reflect off internal body structures to create images.

Question 16

Which of the following best describes how energy is transferred by sound waves?

Accepted Answer

Energy is transferred by the movement of particles in a medium.

Question 17

A dolphin uses echolocation to find fish underwater. If the speed of sound in water is $$1500 	ext{ m/s}$$ and the echo returns in $$0.2 	ext{ s}$$, how far away is the fish?

Accepted Answer

$$\frac{1500 	imes 0.2}{2} = 150 	ext{ m}$$

Question 18

Which of the following statements about microphones is correct?

Accepted Answer

Microphones convert sound waves into electrical signals.

Question 19

Why are loud sounds potentially dangerous to human hearing?

Accepted Answer

They can damage the cochlea and hearing cells.

Physics Study Guide: Sound and Scientific Data

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