Mechanical waves are called elastic waves.
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Mechanical waves are called elastic waves.
a) True
b) False
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- 50.) A waves velocity can be calculated by dividing its frequency by its wavelength. a. true b. falseWhat is the wavelength (in m) of an earthquake that shakes you with a frequency of 10.5 Hz and gets to another city 81.0 km away in 12.0 s? Additional Materials O ReadingWhat do you expect from sound heard when you match the resonance frequency of the drinking glass? Would you expect a change in the amplitude, frequency, or wavelength? What is the resonance frequency measured? Use the ruler to measure the length of the drinking glass.
- As a sound wave propagates further over time, which of the following would be true? a. the amplitude of the wave will slowly increase over time b. the frequency of the wave will increase as it travels further c. the intensity of the sound wave will decrease d. the pitch of the sound wave will decrease e. None of the above will occur51Soft sound waves and loud sound waves travel with the samespeed in air because A. Speed of sound wave is same in air and water. B. Type of wave and medium is same. C. Medium is same but type of wave is different. D. Sound waves travel with speed of light in air and speed of light is equal to 3 x 108 m/s.
- #4An ambulance with its siren on is heading east along a straight highway at 65 mph. A car also moves on the same road. In which case will the driver of the car perceive that the frequency of the siren is lower? Select one: a. The car is moving west at 65 mph and is behind the ambulance. b. The car is moving west at 65 mph and is in front of the ambulance. c. The car is moving east at 65 mph and is in front of the ambulance. d. The car is moving east at 65 mph and is behind the ambulance.27. A spring is attached to a 2.5-kg mass on the horizontal frictionless surface. The spring is initially stretched at a position of 7 cm. When it is released, the spring undergoes simple harmonic oscillation with a period of 1.65 seconds. Find the spring constant, k = ? a. 65.7 N/m b. 11.6 N/m c. 59.8 N/m d. 36.3 N/m