the correct answer is Carbon. I put hydrocarbon and it was wrong Carbon is 100% correct.
Answer: the density of the object / the mass it takes to stand up.
Explanation:
B. Rovers are what you are looking for
Answer: The frequency of this light is
.
Explanation:-
To calculate the frequency of light, we use the equation:

where,
= wavelength of the light =

c = speed of light = 
= frequency of light = ?



The frequency of this light is
.
D is the answer - plate boundaries