Energy Transfer in Waves
Physics ⇒ Waves and Sound
Energy Transfer in Waves starts at 8 and continues till grade 12.
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A sound wave travels from air into water. Does the energy transfer increase, decrease, or stay the same? Explain.
A wave has an amplitude of 0.1 m. If the amplitude is reduced to 0.05 m, by what factor does the energy carried by the wave change?
Describe how energy is transferred in a sound wave traveling through air.
Describe how energy is transferred in ocean waves.
A light wave has a frequency of 6×1014 Hz. What is the energy of a single photon of this light? (Planck's constant h = 6.63×10-34 J·s)
A sound wave has an intensity of 0.01 W/m² at a distance of 2 m from the source. What is the total power output of the source, assuming it radiates equally in all directions?
A sound wave travels from air into water. Does the energy transfer increase, decrease, or stay the same? Explain.
A string is vibrating with a frequency of 50 Hz and a wavelength of 0.4 m. Calculate the speed of the wave on the string.
Which of the following best describes the energy transfer in a longitudinal wave? (1) Perpendicular to the direction of propagation (2) Parallel to the direction of propagation (3) In a circular motion (4) No energy transfer
Which of the following factors does NOT affect the energy carried by a wave? (1) Amplitude (2) Frequency (3) Wavelength (4) Color
Which of the following is a correct statement about the relationship between wave speed, frequency, and wavelength? (1) v = f × λ (2) v = f / λ (3) v = λ / f (4) v = f + λ
Which of the following is NOT a property that affects the energy transfer in a wave? (1) Amplitude (2) Frequency (3) Medium (4) Temperature of observer
Fill in the blank: The energy per unit time crossing a unit area perpendicular to the direction of wave propagation is called ________.
Fill in the blank: The energy transferred by a wave per second is called its ________.
If the amplitude of a wave is doubled, the energy it carries increases by a factor of ________.
The energy carried by a wave is proportional to the ________ of its amplitude.
True or False: In a standing wave, energy is transferred from one end to the other.
True or False: In a transverse wave, the energy is transferred in the same direction as the particle displacement.
True or False: The energy carried by a wave is directly proportional to the square of its amplitude.
True or False: The energy of a wave is always conserved as it travels through a medium.
