Answer:
t = 110.079 nm
Explanation:-
we know that
for constructive interference in thin film
2nt = (m + (1/2))λ
where, n is refractive index
for minimum thickness m =0
2nt = λ /2
thickness t = λ / 4n
Here
wavelength of light, λ = 612*10^{-9} m
refractive indices = 1.393

t = 110.03 nm
Explanation:
We need to find the speed of a 3.1eV proton and a 3.1eV electron.
For proton, using conservation of energy such that,

is mass of proton

For electron,

is mass of proton

Hence, this is the required solution.
Answer:
W = 907963.50 J = 907.96 J
Explanation:
Note: Refer to the figure attached
Now, from the figure we have similar triangles ΔAOB and ΔCOD
we have

or

Now, the work done to empty the tank can be given as:

or

or

or

or
![W = 6773.76\pi[\frac{5}{3}x^3-\frac{1}{4}x^4]^4_0](https://tex.z-dn.net/?f=W%20%3D%206773.76%5Cpi%5B%5Cfrac%7B5%7D%7B3%7Dx%5E3-%5Cfrac%7B1%7D%7B4%7Dx%5E4%5D%5E4_0%20)
or
![W = 6773.76\pi[\frac{128}{3}]](https://tex.z-dn.net/?f=W%20%3D%206773.76%5Cpi%5B%5Cfrac%7B128%7D%7B3%7D%5D%20)
or
W = 907963.50 J = 907.96 J
Explanation:
electric current is the answer