Standing waves basic calculations

An open pipe (80 cm long) makes a tone travelling at 330 m/s. Calculate the first harmonic wavelength.

• 40 cm

• 80 cm

• 120 cm

• 160 cm

Tags

NGSS.HS-PS4-1

An open pipe (40 cm long) makes a tone travelling at 330 m/s. Calculate the frequency of the fundamental wave.

• 4.125 Hz

• 264 Hz

• 26400 Hz

• 412.5 Hz

Tags

NGSS.HS-PS4-1

An open pipe (1.8 m long) makes a tone travelling at 330 m/s. Calculate its frequency for the 3rd harmonic.

• 183.3 Hz

• 234 Hz

• 275 Hz

• 594 Hz

Tags

NGSS.HS-PS4-1

A closed pipe (0.36 m long) makes a tone travelling at 342 m/s. Calculate the tones frequency for the harmonic that comes after the fundamental one shown.

• 712.5 Hz

• 170 Hz

• 275 Hz

• 594 Hz

Tags

NGSS.HS-PS4-1

A violin string of length 0.54 m and wave speed of 565 m/s along it. Calculate the frequency of the 5th harmonic.

• 1046.3 HZ

• 282.5 Hz

• 3138.89 Hz

• 1546 Hz

Tags

NGSS.HS-PS4-1

What is "Beats"?

• The regular pulsing of pitch of a sound which is heard when 2 sources produce sounds of slightly different frequency.

• The regular pulsing of loudness of a sound which is heard when 2 sources produce sounds of slightly different frequency.

• The regular pulsing of a sound giving a characteristic tone / timbre which is heard when 2 sources produce sounds of slightly different frequency.

• The regular pulsing of loudness of a sound which is heard when 2 sources produce sounds of the same frequency.

Tags

NGSS.HS-PS4-1

Calculate the beat frequency if a 400 Hz and a 397 Hz sound are heard by Quinn.

• 1 Hz

• 2 Hz

• 3 Hz

• 4 Hz

Tags

NGSS.HS-PS4-1

Speed of the wave in a string is 525 m/s. At 440 Hz a 5Hz beat frequency is heard. At 450 Hz a 15 Hz beat frequency is heard. Calculate the length of the string.

• 0.6 m

• 1.2 m

• 1.6 Hz

• 2.1 Hz

Tags

NGSS.HS-PS4-1

Speed of the wave in a string is 522 m/s. At 340 Hz a 20 Hz beat frequency is heard. At 350 Hz a 10 Hz beat frequency is heard. Calculate the length of the string.

• 0.25 m

• 0.725 m

• 0.525 m

• 0.225 m

Tags

NGSS.HS-PS4-1

Two didgeridoo's sound their fundamental note of 106 Hz and 110 Hz respectively. Which one is longer and calculate the beat frequency.

• 106 Hz and 8 Hz

• 110 Hz and 4 Hz

• 106 Hz and 4 Hz

• 110 Hz and 8 Hz

Tags

NGSS.HS-PS4-1