Physics: Waves and Oscillations
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Questions and Answers

What is the primary characteristic that distinguishes a mechanical wave from an electromagnetic wave?

  • The wave can travel through a vacuum.
  • The wave has a definite frequency.
  • The wave requires a physical medium to propagate. (correct)
  • The wave has a definite amplitude.

What is the period of a simple pendulum if its length is 2 meters and acceleration due to gravity is 9.8 m/s²?

  • 2.83 s
  • 1.41 s (correct)
  • 3.13 s
  • 1.25 s

A transverse wave is propagating through a rope. What is the direction of the particles of the rope in relation to the direction of the wave propagation?

  • The particles oscillate in the same direction as the wave propagation.
  • The particles oscillate at an angle of 45 degrees to the direction of wave propagation.
  • The particles are stationary.
  • The particles oscillate perpendicular to the direction of wave propagation. (correct)

A spring is oscillating with a frequency of 2 Hz. What is the period of the oscillation?

<p>0.5 s (A)</p> Signup and view all the answers

What is the main difference between a longitudinal wave and a transverse wave?

<p>The direction of particle oscillation. (C)</p> Signup and view all the answers

A pendulum has a length of 3 meters and is oscillating in simple harmonic motion. What is the angular frequency of the pendulum?

<p>The angular frequency of the pendulum is √(g/L) = √(9.8/3) = √3.267 rad/s.</p> Signup and view all the answers

A spring with a spring constant of 100 N/m is oscillating with an amplitude of 0.1 m. What is the total energy of the oscillation?

<p>The total energy of the oscillation is (1/2)kA² = (1/2)(100)(0.1)² = 0.5 J.</p> Signup and view all the answers

A wave has a frequency of 50 Hz and a wavelength of 2 meters. What is the speed of the wave?

<p>The speed of the wave is the product of the frequency and wavelength, v = fλ = (50)(2) = 100 m/s.</p> Signup and view all the answers

A transverse wave is propagating through a medium with a speed of 200 m/s. If the wavelength of the wave is 4 meters, what is the period of the wave?

<p>The period of the wave is the reciprocal of the frequency, T = λ/v = 4/200 = 0.02 s.</p> Signup and view all the answers

An electromagnetic wave has a frequency of 3 x 10⁸ Hz. What is the wavelength of the wave?

<p>The wavelength of the wave is the speed of light divided by the frequency, λ = c/f = (3 x 10⁸ m/s) / (3 x 10⁸ Hz) = 1 m.</p> Signup and view all the answers

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