Answer:
hence initial wavelength is 
Explanation:
shift in wavelength due to compton effect is given by

λ' = the wavelength after scattering
λ= initial wave length
h= planks constant
m_{e}= electron rest mass
c= speed of light
θ= scattering angle = 180°
compton wavelength is


( put cos 180°=-1)
also given λ'=2λ
putting values and solving we get

hence initial wavelength is 
Momentum = Mass*Velocity
Momentum = 75*13
Momentum = 975
The answer is 975 kg-m/s
Hope you get help
Answer:
704m
Explanation:
Given, initial velocity, u=0m/s and final velocity v=65m/s
Acceleration a=3m/s 2
If d be the allowed length for the runway.
Using formula v*2 −u*2 =2aS
(65)*2−0*2 =2(3)d
⟹ d=65*2 /6=704.16∼704m
Answer:
Heat Input = Work Output (at 100% efficiency)
ΔQ = ΔW
(you cannot get something for nothing)
Oil keeps the moving metal parts of an engine smoothly rubbing together through lubrication. Just like with other mechanical devices, energy can be lost due to friction caused by lack of proper lubrication. When an engine is running on old or insufficient oil, more friction and heat is produced between the rubbing moving parts. A decline in gas mileage follows this since the fuel takes more than usual to do the same task.