1. In mechanical waves, which property determines the energy of the wave?
a. Frequency
b. Wavelength
c. Amplitude
d. Period
2. In light waves, which property determines the amount of energy in the wave?
a. Frequency
b. Wavelength
c. Amplitude
d. Period
3. Which mathematical function models the shape of a transverse wave?
a. Sine
b. Cosine
c. Tangent
4. What is the relationship between period and frequency?
a. Period is the inverse of frequency.
b. Period is a multiple of frequency.
c. Period is the quotient of frequency.
d. Period is the sum of all the frequencies.
Pls help!
1. c. Amplitude
2. a. Frequency
3. a. Sine
4. a. Period is the inverse of frequency.
What is the frequency of a wave that has a period of 0.32 seconds? Show all work and use correct units of measure to get full credit.
The formula for frequency is:
frequency = 1/period
where period is in seconds and frequency is in hertz (Hz).
Given: period = 0.32 seconds
Substituting into the formula:
frequency = 1/0.32 seconds
frequency = 3.125 Hz
Therefore, the frequency of the wave is 3.125 Hz.
A stationary source produces a sound wave at a frequency of 100 Hz. The wave travels at 1125 feet per second. A car is moving toward the sound source at a speed of 100 feet per second.
What is the wavelength of the stationary sound source and the wavelength that a person in the car perceives? (Hint: One of these components uses one of the two Doppler Effect formulas.)
The formula for wavelength is:
wavelength = speed of sound / frequency
where speed of sound is in feet per second and frequency is in hertz (Hz).
Given: frequency = 100 Hz, speed of sound = 1125 feet per second, speed of car = 100 feet per second.
Wavelength of the stationary sound source:
wavelength = speed of sound / frequency
wavelength = 1125 feet per second / 100 Hz
wavelength = 11.25 feet
Therefore, the wavelength of the stationary sound source is 11.25 feet.
Wavelength heard by a person in the car:
The formula for the Doppler Effect for sound approaching the observer is:
f' = f (v + vo) / (v + vs)
where f is the frequency of the sound source, v is the speed of sound, vo is the velocity of the observer (positive if moving towards the source, negative if moving away from the source), and vs is the velocity of the source (positive if moving away from the observer, negative if moving towards the observer).
Substituting the given values into the formula:
f' = 100 Hz (1125 feet per second + 100 feet per second) / (1125 feet per second - 0 feet per second)
f' = 1100 Hz
The perceived frequency of the sound wave is 1100 Hz.
Now, using the formula for wavelength:
wavelength = speed of sound / perceived frequency
wavelength = 1125 feet per second / 1100 Hz
wavelength = 1.023 feet
Therefore, the wavelength heard by a person in the car is 1.023 feet.
Which statement best describes the refraction of light as it moves from air to glass?
Responses
Although the light bends, its speed remains the same as before.
Although the light bends, its speed remains the same as before.
Light undergoes diffraction due to the difference in the speed of light in air and glass.
Light undergoes diffraction due to the difference in the speed of light in air and glass.
Although the light changes speed, it continues in the same direction as before.
Although the light changes speed, it continues in the same direction as before.
Light bends due to the difference in the speed of light in air and glass.