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 
Answer:
the one that looks lik 0=0
Explanation:
Answer:

Explanation:
The marble released through the trap door inside the elevator going upward at a speed vo would have an upward velocity of vo, but begins to experience a downward acceleration g = 9.81m/s^2. This is essentially same as throwing the marble up at a speed of vo. We can solve for the greatest height using the law of energy conservation.
When the marble is traveling up, its potential energy is converted to kinetic energy:


where m is the marble mass and h is the vertical distance traveled from the releasing point to the maximum height.
We can divide both sides by m


This is only partial of the height from the ground. To find the total height we need to add the height from the ground to the release point, which is the distance traveled by the elevator within time t = 2.35s at speed vo

Plug in the value for vo and we can calculate the maximum height
Answer:
You rubbing your hands together
Your hands are sliding against each other
Answer:
Resistance of gold wire, 
Explanation:
In this question we have given
Density of gold, 
resistivity of gold, 
Length of wire, 
Temperature, 
We know that relation between volume and density is given as

Therefore, volume occupied by one gram gold is given as,
.........(1)
We Know that Volume of gold wire which is cylindrical in shape is given by following formula
......(2)
Here,
...........(3)
here A is the cross sectional area of cylendrical gold wire
From equation 2 and 3
we got
...............(4)
on comparing equation 1 and equation 4, we got,



we know that resistance and resistivity are related by following formula,
................(5)
Put values of resistivity, A and L in equation 5, we got


Therefore resistance of gold wire, 