Topic 10: Mechanical waves and sound

The wave speed of a wave in terms of its wavelength λ and period, T is:

• $v=\lambda T$

• $v=\lambda T^2$

• $v=\frac{\lambda}{T}$

• $v=\frac{T}{\lambda}$

The equation of a progressive wave is given by y = 0.1 sin (3x + 10t) where y and x are in meters and t in second. The direction of the wave is

• leftwards

• rightwards

• upwards

• downwards

Two progressive waves of the same amplitude and frequency travelling in opposite directions along the same path in the same medium produce:

• beats

• resonance

• standing waves

• interference

Which property of wave motion distinguish a progressive wave from standing wave:

• amplitude

• frequency of vibration

• propagation of energy

• direction of vibration

Waves are a transfer of what?

• Heat
• Light
• Energy
• Food

Tags

NGSS.MS-PS4-1

What property of this wave is represented by the letter "A"

• amplitude
• crest
• trough
• wavelength

Tags

NGSS.MS-PS4-1

The units for frequency are measured in _____________.

• hertz
• seconds
• m/s
• m

Tags

NGSS.MS-PS4-1

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength is not directly affected by the frequency of a wave.
• The wavelength increases.
• The wavelength decreases.
• More specific information is needed to form a conclusion about the wavelength.

Tags

NGSS.HS-PS4-1