10.2

Which waveform has the lowest frequency?

• (a)

• (b)

• (c)

• (d)

• (e)

Tags

NGSS.MS-PS4-1

If the distance represented by the letter A (the amplitude) were increased, how would it change the sound?

• The sound would be higher.

• The sound would be softer.

• The sound would be lower.

• The sound would be louder.

Tags

NGSS.MS-PS4-1

What best describes the doppler effect?

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer

• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

Tags

NGSS.MS-PS4-1

A student holds two vibrating objects.  Object A is vibrating faster than object B.  Which statement is true?

• A is louder than B

• B is louder than A

• A will have a higher pitch than B

• B will have a higher pitch than A

Choose the correct statements. (2 answers)

• P - The loudness increases

• Q - The pitch decreases

• R - The loudness decreases

• S - The pitch increases

Tags

NGSS.MS-PS4-1

The ____________ of sound is the number of sound vibrations generated in a second.

• amplitude

• frequency

• reflection

• absorption

Frequency is measured in the unit of

• Ampere (A)

• Hertz (Hz)

• Mole (mol)

• Meter (m)

Tags

NGSS.HS-PS4-1

The human ear can hear a minimum of ____Hz.

• 20 Hz

• 10 Hz

• 30 Hz

• 50 Hz

Tags

NGSS.MS-PS4-1

What is the frequency of a wave with a period of 10.2 seconds?

• 0.098 Hz

• 10.2 Hz

• 102 Hz

• 0.49 Hz

Tags

NGSS.HS-PS4-1

A chemical reaction has an enthalpy change of -10.2 kJ/mol. What does this indicate about the reaction?

• It is endothermic.

• It is exothermic.

• It is at equilibrium.

• It is non-spontaneous.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5