Throw away food left out at room temperature for more than two hours (one hour if the temperature was above 90 degrees F). True
2 answers:
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Explanation:
Formula for maximum efficiency of a Carnot refrigerator is as follows.
..... (1)
And, formula for maximum efficiency of Carnot refrigerator is as follows.
...... (2)
Now, equating both equations (1) and (2) as follows.
=
=
=
= 2.5
Thus, we can conclude that the ratio of heat extracted by the refrigerator ("cooling load") to the heat delivered to the engine ("heating load") is 2.5.
Answer:
10 m/s
Explanation:
The speed of a wave is given by
where
is the wavelength
f is the frequency
For the wave in this problem,
- The frequency is given by the number of oscillations per second, so
- The wavelength is
So, the wave speed is