SPEED OF SOUND

Two waves on identical slinky have frequencies in a ratio of 2 to 1. If their wave speeds are the same, then how do their wavelengths compare?

• 2:1

• 1:2

• 4:1

• 1:4

Dawn and Aram have stretched a slinky between them and begin experimenting with waves. As the frequency of the waves is doubled, ___________________.

• both the wavelength and the speed are halved

• both the wavelength and the speed remain constant

• the wavelength is halved, and the speed remains constant

• the wavelength remains constant, and the speed is doubled

A ruby-throated hummingbird beats its wings at a rate of about 70 wing beats per second. What is the frequency in Hertz of the sound wave?

• 50 Hz

• 60 Hz

• 70 Hz

• 80 Hz

Assuming the sound wave moves with a velocity of 350 m/s, what is the

      wavelength of the wave if its frequency is 70 Hz?

• 5.0 m

• 10.0 m

• 15.0 m

• 20.0 m

A bat produces a sound at 17,250Hz and wavelength 0.019m. What is the speed of the sound?

• 1. 15 x 10^-6 m/s

• 3. 28 x 10² m/s

• 8. 6 x 10⁵ m/s 

• 1. 7 x 10⁶ m/s