Answer:
d
Explanation:
because is a reducing agent, O 2 is an oxidizing agent.
Roughly 115,200 times a day
Answer:

Explanation:
Given that


Emissivity of surfaces(∈) = 1
We know that heat transfer between two surfaces due to radiation ,when both surfaces are black bodies

So now by putting the values



So rate of heat transfer per unit area

The frequency is
and it is blue light
Explanation:
The relationship between the speed, the frequency and the wavelength of an electromagnetic wave is given by:

where
is the speed of light
f is the frequency of the wave
is its wavelength
In this problem, the wavelength of the wave is

Therefore, its frequency is:

The wavelength of this wave is

And by looking at the table of the wavelengths of the colors, we notice that this corresponds to the blue light, which has a range of wavelength of
[450 - 495] nm
Learn more about waves and electromagnetic waves here:
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