Inside a television picture tube there is a build-up of electrons (charge of 1.602 × 10–19 C) with an average spacing of 38.0 nanometers between electrons. Find the electric field inside the picture tube. (Round to three significant figures.)

Electric field,

Explanation:

We have,

Charge on electron is

Distance between electron is 38 nm.

It is required to find the electric field inside the picture tube. The electric field at a distance r is given by :

So, the electric field inside the picture is

this could be newton#'s law of cooling. the cooling curve is exponential