The missing question is: how many photons are produced per second?
Answer:
Explanation:
The energy of a photon is given by
where
h is the Planck constant
c is the speed of light
is the wavelength of the photon
In this problem, the photons have wavelength
, so each photon has an energy of
The total energy emitted by the bulb in 1 second is
E = 100 J
Therefore, the number of photons emitted per second is
Answer:27.35 s
Explanation:
Given
weight of man =730 N
mass of man
radius of pound r=5.8 m
mass of book
velocity of book
let be the velocity of man
conserving momentum
time taken by man to reach south end