Answer:
F/K=4.5/9=0.5
Explanation:
that's the way to find it
Light travels at the speed of 186,000 miles per second. If you were to travel around the earth it would be 7.5 times in a second
108000000. there you go hope it helped
Answer:
Frequency, 
Explanation:
Given that,
The wavelength of the x-rays, 
We need to find the frequency of an x-ray. All electromagnetic wave travel with a speed of light. It is given by the formula as :

f is the frequency

So, the frequency of an x-ray is
. Hence, this is the required solution.