How do you calculate a wavelength of light emitted when
theelcetron in doubly ionized lithium makes a transiton
frome12 to e8?

Wavelength of light emitted when  the electron in doubly ionized lithium makes a transition  from E12 to E8 is  

Explanation:

Using Rydberg's Equation for hydrogen and hydrogen like atom:

Where,

= Wavelength of radiation

= Rydberg's Constant

= Higher energy level  

= Lower energy level

We have:

The wavelength of the photon emitted when the hydrogen atom undergoes a transition is

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds