A String That Is 0 $0.88 \mathrm {~m}$ Long and Open at Both Ends into Its Second Overtone

question 4

Multiple Choice

A string that is 0.26 m long is vibrating in its n = 6 harmonic.The sound from this string excites a pipe that is $0.88 \mathrm {~m}$ long and open at both ends into its second overtone resonance.What is the common resonant frequency of the string and the pipe? The speed of sound in air is 345 m/s.

• A)590 Hz
• B)390 Hz
• C)490 Hz
• D)690 Hz
• E)760 Hz

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Definitions:

Temporal Summation

A process by which multiple subthreshold excitatory post-synaptic potentials (EPSPs) combine within a brief period to produce a larger postsynaptic potential.

Spatial Summation

The process by which multiple synaptic inputs from different locations on the same neuron combine to influence the firing rate or activity of the neuron.

Dendrites

The branched projections of a neuron that act to conduct the electrochemical stimulation received from other neural cells to the cell body.

Back Propagation

Reverse movement of an action potential into the soma and dendritic field of a neuron; postulated to play a role in plastic changes that underlie learning.