Weak nuclear force is the most involved
<span>E=hc/wav. len
E = (6.62 x 10^-34 x 3 x 10^8)/0.0275 x 10^-9
E = 7.22182 x 10^-15 J
To convert to eV divide by 1.6 x 10^-19
E = 7.22182 x 10^-15/1.6 x 10^-19 eV
E =45.36 x 10^3 eV
Th energy, E, of a single x-ray photon in eV is = 45.36keV.
Number of photons, n = total energy/ energy of photon
n = 3.85 x 10^-6/7.22182 x 10^-15
n = 5.33 x 10^8 photons </span>
Answer
given,
Echo time = t = 1000 s
speed = ?
a) speed of electromagnetic wave
wave travels Venus two time
d = 1.5 x 10¹¹ m
b) now, echo time
t = 5 x 10⁻⁷ s
Answer:
The answer is "Repetition"
Explanation: when you say something more than 3 times, is called repetiton
