Explanation:
If box weight 25N on ground
MA=F
M(10)=25
M=2.5Kg
From the law of conservation of momentum
m1u1+ m2u2= m1v1+ m2v2
110*8+ 110*-10= 110*-10 + 110* v2
v2= 8 m/sec
The energy of a photon is given by

where

is the Planck constant
f is the frequency of the photon
In our problem, the frequency of the light is

therefore we can use the previous equation to calculate the energy of each photon of the green light emitted by the lamp:
Answer:
nuclear battery to generate energy
from shortest wavelength to longest:
Ultraviolet
visible
infrared
microwave
so the answer is B