Shm and Waves

A transverse wave is traveling on a string. The graph shows position as a function of time for a point on the string. If the frequency of the wave is doubles, what is the average speed of the point? (Hint: since you can't find wavelength, thing about the distance the point travels over time)

• 0 m/s

• 2.4 m/s

• 4.8 m/s

• 9.6 m/s

Tags

NGSS.HS-PS4-1

A geologist is using a sensor to record waves in a layer of the rock and is viewing them in a monitor screen. At one moment the monitor shows the signal on the right. If the signal is created by just two traveling waves, what can be concluded from the signal about the waves when they reach the sensor? Choose two correct answers.

• The waves have different frequencies.

• The waves have different amplitudes.

• The waves are traveling in opposite directions.

• The waves are traveling at different speeds.

Tags

NGSS.HS-PS4-1

A small vibrating object on the surface of a ripple tank is the source of waves of frequency 20 Hz and speed 60 cm/s. If the source S us moving to the right, as shown, with speed 20 cm.s, at which of the labeled points will the frequency measured by a stationary observer be the greatest?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

The figure shows a transverse wave traveling to the right at a particular instant of time. The period of the wave is 0.2 s. What is the amplitude of the wave?

• 4 cm

• 5 cm

• 8 cm

• 10 cm

The figure shows a transverse wave traveling to the right at a particular instant of time. The period of the wave is 0.2 s. What is the speed of the wave?

• 4 cm

• 25 cm

• 50 cm

• 100 cm

Tags

NGSS.HS-PS4-1

A hollow tube of length L open at both ends is held in midair. A tuning fork with a frequency f₀ vibrates at one end of the tube and causes the air in the tube to vibrate at its fundamental frequency. Express your answers in terms of L and f₀:

Determine the wavelength of the sound.

• 1/2 L

• L

• 2L

• 4L

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

A hollow tube of length L open at both ends is held in midair. A tuning fork with a frequency f₀ vibrates at one end of the tube and causes the air in the tube to vibrate at its fundamental frequency. Express your answers in terms of L and f₀:

Determine the next higher frequency at which this air column would resonate?

• f₀

• 2f₀

• 3f₀

• 4f₀

Tags

NGSS.HS-PS4-1

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120Hz. The other end of the string passes over a pulley and is connected to a suspended mass M as shown in the figure. The value of M is such that the standing wave patterns has four "loops". The length of the string from the tuning fork to the point where the string touches the top of the pulley is 1.20 m. The linear density of the string is 1.0 x 10 ^-4 kg/m, and remains constant throughout the experiment.

Determine the wavelength and speed of the standing wave.

• 1.20 m ; 144 m/s

• 0.60 m ; 72 m/s

• 0.30 m ; 36 m/s

Tags

NGSS.HS-PS4-1

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120Hz. The other end of the string passes over a pulley and is connected to a suspended mass M as shown in the figure. The value of M is such that the standing wave patterns has four "loops". The length of the string from the tuning fork to the point where the string touches the top of the pulley is 1.20 m. The linear density of the string is 1.0 x 10 ^-4 kg/m, and remains constant throughout the experiment.

The speed of waves along the string increases with increasing tension. Indicate whether the value M should be increased or decreased in order to double the number of loops in the standing wave pattern.

• Increase M because: more loops -> larger λ -> less v -> more T

• Increase M because: more loops -> smaller λ -> more v -> more T

• Decrease M because: more loops -> larger λ -> more v -> less T

• Decrease M because: more loops -> smaller λ -> less v -> less T

Tags

NGSS.HS-PS4-1

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120Hz. The other end of the string passes over a pulley and is connected to a suspended mass M as shown in the figure.

If a point on the string at an antinode moves a total vertical distance of 4 cm during one complete cycle, what is the amplitude of the standing wave?

• 1 cm

• 2 cm

• 4 cm

• 8 cm

• 12 cm

Tags

NGSS.HS-PS4-1