Hospital x-ray generators emit x-rays with wavelength of about 15.0 nanometers (nm), where 1nm=10−9m. what is the energy of a photon of the x-rays? express your answer to three significant figures and include the appropriate units.

Explanation:

Given that,

The wavelength of x ray,

We need to find the energy if a photon on the x-rays. The formula for the energy of the photon is given by :

So, the energy of a photon of the X-rays is . Hence, this is the required solution.

its c its is a mixture of gases

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be