Answer:
Hydrogen
Explanation:
(H) atom does not have any neutrons in it's tiny nucleus.
Answer:
It think it's either A or D.
But I think the answer is most likely to be A because most railroad tracks aren't in tunnels and the D doesn't describe anything about tunnels.
Explanation:
Answer:
0.00000011 m
Explanation:
n = 0 for minimum thickness
t = Thickness
= Refractive index of the film = 1.25
= Wavelength = 
We have the formula
The minimum thickness of the film is 0.00000011 m
Answer:
Metals can be hammered into thin sheets, and nonmetals are brittle
