Explanation:
For a circular orbit v=
with G = 6.6742 × 
Given m = 6.42 x 10^23 kg and r=9.38 x 10^6 m
=> v = 2137.3 m/s
I hope this is the correct way to solve
Answer:
and 
Explanation:
The wavelength of a visible light is 727.3 nm.

The formula is as follows :

f is the frequency of the visible light

Energy of a photon is given by :
E = hf, h is Planck's constant

Red color has a frequency of
and energy per photon is
.
Answer:
False. Temperature is independent of volume
The answer is voluntary involvement! :D Welcome
Answer:
0.5 eV
Explanation:
= Initial potential energy = 
= Final potential energy
= Initial width
= Final width = 
Energy of an electron in a one-dimensional trap is given by

From the equation we get

So,

The ground state energy will be 0.5 eV