Frequency..Wavelength questions?

Question

If the coolant in an air conditioner has a lower temperature than does the air in a building, then ________.

heat will flow from the coolant into the air

heat will flow from the air into the coolant

no heat flow will take place

And also

A wave has a frequency of 4 Hz and a speed of 24 m/s, which is its wavelength?

Thanks so much

Answer 1

heat will flow from the air into the coolant

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L = v/f = 24/4 = 6 m