What must be true about tow objects if heat is flowing between them?
1 answer:
Explanation:
They have different temperatures. Heat always flows from high temperature to low temperature.
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the answer in my opinion would be A
That would be true because a solid object can cast a shadow
The frequency of this wave is 3
Answer:
Check the explanation
Explanation:
The beat frequency is
df = f2 - f1
the wavelength is
lamda1 = (v/f1)
and lamda2 = (v/f2)
where v = 340 m/s,f1 = 25.0 kHz and f2 = 20.0 kHz
Properties of a particle answer D
