Standing Waves

In a standing wave, each anti-node is

• 2 wavelengths

• 1/2 of a wavelength

• a wavelength

• 1/4 of a wavelength

A node is

• the same as an anti-node

• an area of max amplitude

• an area of no amplitude

• the same as a trough

The largest wave that can be created in a standing wave is called

• a resonance

• a node

• a harmonic

• a fundamental

If a wave has a fundamental frequency of 550 Hz. What is the frequency of the 5th harmonic?

• 555 Hz

• 110 Hz

• 2750 Hz

• .01 Hz

The 6th harmonic of a wave has a frequency of 480 Hz. What is the frequency of the fundamental?

• 48 Hz

• 80 Hz

• 90 Hz

• 120 Hz

The 3rd harmonic of a wave has 3 anti-nodes. How many wavelengths is the wave?

• 3 wavelengths

• 4 wavelengths

• 1 wavelength

• 1.5 wavelengths

Another name for the 1st harmonic is the

• 1st frequency

• fundamental frequency

• wavelength

• standing wave

A standing wave is a wave that is trapped between

• two anti-nodes

• two boundaries

• two harmonics

• driving ends

Which of the following describe harmonics?

• Sound louder and keep their energy longer.

• Sound softer and lose their energy faster

• Sound the same with no change in energy

• Sound twice as loud and lose their energy twice as fast

If the 3rd harmonic is 21 Hz, find harmonic 4.

Type in the number without the unit.