A sound source producing $1\mathrm{.}70$ kHz waves moves toward a stationary listener at one$-$half the speed of sound.

Part A

What frequency will the listener hear?

Express your answer with the appropriate units.

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f$1=$

Request$$Answer

Part B

Suppose instead that the source is stationary and the listener moves toward the source at one$-$half the speed of sound. What frequency does the listener hear?

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

f$2=$

nothingnothing

To get her violin perfectly tuned to concert A$,$ should she tighten or loosen her string from what it was when she heard the $7\mathrm{.}00$ Hzbeat?

She should tighten her string.She should loosen her string.