Answer:
Explanation:
First of all, we can find the speed of the sound wave, which is given by:
where
f = 645 Hz is the frequency
is the wavelength
Substituting,
Now we can find the temperature of the air by using the following relationship:
where T is the temperature in Celsius degrees. Since we know v = 322.5 m/s, we can re-arrange the formula to find the temperature:
Hi,
Answer: D) The Sun
<u>My work:</u> The Sun is needed for living organisms such as; plants, animals, and human beings there selves, but not because it forms organic matter with the help of carbon dioxide and water, but because it gives us warmth and energy to suck in.
I Hope I Helped!