Physics 1

Question 1

What are longitudinal waves?

Answer 1

Oscillations happen in the same direction as the energy transfer.

Question 2

Example of longitudinal waves

Answer 2

Sound waves.

Question 3

What are transverse waves?

Answer 3

Oscillations happen perpendicular to the energy transfer.

Question 4

Example of transverse waves

Answer 4

Radio waves, infrared, water, guitar strings.

Question 5

What is amplitude?

Answer 5

Height of a wave (the maximum distance of the wave from its equilibrium).

Question 6

What is a wave front?

Answer 6

An imaginary surface representing corresponding points of a wave that vibrate in unison.

Question 7

What is frequency?

Answer 7

The number of waves per second.

Question 8

What is the wavelength?

Answer 8

The distance between a point on one wave and the same point on the next wave.

Question 9

What is the period of the wave?

Answer 9

Time taken for one oscillation.

Question 10

What is recall?

Answer 10

Waves transfer energy and information without transferring matter.

Question 11

Frequency range for human hearing

Answer 11

20-20,000 Hz.

Question 12

How do you measure the speed of sound in air?

Answer 12

Measure the time taken for a sound to travel a set distance.

Question 13

How are microphones used to display sound waves?

Answer 13

Microphones pick up sound waves, causing a diaphragm to vibrate, which is converted into electrical signals.

Question 14

How are oscilloscopes used to display sound waves?

Answer 14

Oscilloscopes display how electrical signals change over time, showing waveforms of sound.

Question 15

How do you read a display of sound waves?

Answer 15

1. Time Axis (X-axis): Shows time. 2. Voltage Axis (Y-axis): Shows amplitude. 3. Waveform Shape: Indicates sound type. 4. Measurement Tools: Measure peak-to-peak voltage and frequency.

Question 16

The pitch of a sound depends on?

Answer 16

The frequency of the vibration of the sound.

Question 17

The loudness of a sound depends on?

Answer 17

Amplitude of vibration.

Question 18

Can ultrasound be heard?

Answer 18

No, it cannot be heard.

Question 19

What is a wave?

Answer 19

A disturbance that travels from one place to another transporting energy and information, but not matter.

Question 20

How does the frequency of the vibration of the source affect the pitch?

Answer 20

Higher frequency = higher pitch; lower frequency = lower pitch.

Question 21

How does the amplitude affect the loudness of a sound?

Answer 21

Higher amplitude = louder sound; lower amplitude = quieter sound.

Question 22

How to draw a line of best fit?

Answer 22

Draw a smooth line that best fits all points; it does not have to include any points.

Question 23

What is the top part of a wave called?

Answer 23

Crest or Peak.

Question 24

What is the bottom part of the wave called?

Answer 24

Trough.

Question 25

Law of reflection

Answer 25

The angle of incidence is equal to the angle of reflection.

Question 26

What is refraction?

Answer 26

The bending of waves when they pass from one medium into another.

Question 27

What happens when a wave enters a denser medium?

Answer 27

Waves slow down and bend toward the normal.

Question 28

What happens when a wave enters a less dense medium?

Answer 28

Waves speed up and bend away from the normal.

Question 29

What are the 2 types of reflection?

Answer 29

Specular reflection and diffuse reflection.

Question 30

What is specular reflection?

Answer 30

Reflection in a single direction by a smooth surface.

Question 31

What is diffuse reflection?

Answer 31

Reflection by a rough surface where rays are scattered in different directions.

Question 32

What is the incident wave?

Answer 32

An incoming wave.

Question 33

What is the reflected wave?

Answer 33

A wave bouncing off the surface at an angle.

Question 34

What is the normal?

Answer 34

An imaginary line that's perpendicular to the surface at the point of incidence.

Question 35

What kind of wave is a seismic P wave?

Answer 35

Longitudinal.

Question 36

What kind of wave is a seismic S wave?

Answer 36

Transversal.

Question 37

What is the speed of a radiowave?

Answer 37

300,000,000 meters per second.

Question 38

Name a device that turns electrical signals into sound waves.

Answer 38

A loudspeaker.

Question 39

What does a microphone do? What energy changes are involved?

Answer 39

It makes sound louder by converting sound energy into kinetic energy, then into electrical energy.

Question 40

Another way to measure the speed of sound in air

Answer 40

Measure the time taken for an echo from a loud sound.

Question 41

What is the wavelength of a wave?

Answer 41

The distance between two identical points on consecutive waves.

Question 42

What happens to the frequency of a wave when entering a different medium?

Answer 42

The frequency always stays the same.