The answer is true. The blowing fan force the hot air to go through the process of convection .
Answer:
where is the picture of star
Within a single medium, the product of (wavelength) x (frequency)
is always the same number, for all waves. (It's the wave-speed.)
This means that longer wavelengths must have lower frequencies,
and shorter wavelengths must have higher frequencies, in order for
the product to always come out to be the same.
C) explore alternative sources of energy, such as solar energy