A. to fuel their chemical reactions
How would energy help them decompose? And how would it help them communicate with other cells? Even better, the cell doesn't NEED to communicate to other cells. And they don't need to block sunlight, and in-fact kind of need it. So the only common sense answer I can think of is A.
Answer:
![f=7.5\times 10^{14}\ Hz](https://tex.z-dn.net/?f=f%3D7.5%5Ctimes%2010%5E%7B14%7D%5C%20Hz)
Explanation:
Given that,
The wavelength of light, ![\lambda=400\ nm=400\times 10^{-9}\ m](https://tex.z-dn.net/?f=%5Clambda%3D400%5C%20nm%3D400%5Ctimes%2010%5E%7B-9%7D%5C%20m)
The speed of light, ![c=3\times 10^8\ m/s](https://tex.z-dn.net/?f=c%3D3%5Ctimes%2010%5E8%5C%20m%2Fs)
We need to find the frequency of light. We know that,
![c=f\lambda](https://tex.z-dn.net/?f=c%3Df%5Clambda)
Where
f is the frequency
So,
![f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{400\times 10^{-9}}\\\\f=7.5\times 10^{14}\ Hz](https://tex.z-dn.net/?f=f%3D%5Cdfrac%7Bc%7D%7B%5Clambda%7D%5C%5C%5C%5Cf%3D%5Cdfrac%7B3%5Ctimes%2010%5E8%7D%7B400%5Ctimes%2010%5E%7B-9%7D%7D%5C%5C%5C%5Cf%3D7.5%5Ctimes%2010%5E%7B14%7D%5C%20Hz)
So, the frequency of light is
.
<span>The speed of the roller coaster when it has to start a similar identical hill the speed would be exactly the same that is 6.0 m/s. And the fact that there is an absence of both friction and air resistance helps us get to this conclusion that it is same as in the previous case.</span>
Answer:
B.
Explanation:
The water collects in the ocean; it is then evaporated by the sun. After evaporation the water turns into water vapor, it then condenses to form clouds.