Answer:
number 7 or 3,5
Explanation:
sana po makatulong po sa inyo
Answer: The wavelength of the x-ray wave is 
Explanation:
To calculate the wavelength of light, we use the equation:

where,
= wavelength of the light = ?
c = speed of x-ray= 
= frequency of x-ray =

Putting in the values:

Thus the wavelength of the x-ray wave is 
7. 1,2,2,2
8. 4,3,1
9. 1,4,1,2
10. 3,4,1,4
The triple beam balance<span> is used to </span>measure<span> masses very precisely; the reading error is 0.05 gram.</span>