Answer:
Explanation:
First of all, we need to calculate the energy of the x-ray photon emitted during the transition from K-shell to L-shell, and this energy is equal to the difference in energy between the two levels:
Converting into Joules,
Now we know that the energy of the photon is related to its wavelength by:
where
h is the Planck constant
c is the speed of light
is the wavelength
Re-arranging the equation for , we find
Answer:
Explanation:
The motion of the bullet is a uniformly accelerated motion, therefore we can find its acceleration by using the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance covered
For the bullet in this problem:
u = 350 m/s is the initial velocity of the bullet
v = 0 is the final velocity (the bullet comes to a stop)
s = 0.125 m is the stopping distance of the bullet
Therefore, by solving the equation for a, we find its acceleration:
And the negative sign tells that the direction of the acceleration is opposite to that of the velocity.
Since for closed system moles of the gas is always conserved
so as per idea gas equation we can say
so here we can say
so here we have
as we know that
now from above equation
on solving above equation we have
so here pressure will be 0.78 atm