Energy Transfer in Waves
Physics ⇒ Waves and Sound
Energy Transfer in Waves starts at 8 and continues till grade 12.
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See sample questions for grade 10
A sound wave travels from air into water. What happens to its speed and wavelength?
Describe how energy is transferred in a water wave.
Describe the difference between energy transfer in mechanical and electromagnetic waves.
Describe what happens to the energy of a wave as it passes through a denser medium.
A sound wave has a frequency of 500 Hz and travels at 340 m/s. What is its wavelength?
A wave has a power of 50 W and transfers energy for 10 seconds. How much energy is transferred?
A wave on a string has an amplitude of 0.05 m. If the amplitude is increased to 0.10 m, by what factor does the energy increase?
A wave travels 300 m in 5 seconds. What is its speed?
Which of the following best describes energy transfer in a stadium wave (the 'Mexican wave')? (1) Each person moves along with the wave (2) Energy is transferred by people standing up and sitting down in sequence (3) The wave is a physical object moving through the crowd (4) The wave is caused by sound
Which of the following best explains why you can feel the bass from loud music through the floor? (1) High-frequency waves carry more energy (2) Low-frequency waves are absorbed by air (3) Low-frequency waves transfer energy more efficiently through solids (4) Sound cannot travel through solids
Which of the following factors does NOT affect the speed of a wave in a given medium? (1) Temperature (2) Amplitude (3) Density (4) Elasticity
Which of the following is an example of energy transfer by a wave? (1) Heat conduction in a metal rod (2) Light from the Sun reaching Earth (3) Water boiling (4) A battery powering a bulb
Fill in the blank: In a longitudinal wave, particles of the medium move __________ to the direction of energy transfer.
Fill in the blank: The __________ of a wave is the maximum displacement from its rest position.
Fill in the blank: The __________ of a wave is the number of complete cycles per second.
Fill in the blank: The amount of energy carried by a wave is directly related to its __________.
True or False: All waves transfer energy at the same rate.
True or False: Electromagnetic waves can transfer energy through a vacuum.
True or False: In a transverse wave, energy is transferred perpendicular to the direction of particle vibration.
True or False: The energy of a wave is always conserved as it travels through different media.
