How much work is needed to assemble an atomic nucleus containing three protons (such as be) if we model it as an equilateral triangle of side 2.00×10−15m with a proton at each vertex?

3.46 x 10^(-13) Joules

Explanation:

The electrical work needed to assemble the system of three charges can be calculated by the following formula:

Where the variables are draw in teh attached image.

In an equilateral triangle:

r_12 = r_13 = r_23  = r

And all the charges are the same, therefore:

q1 = q2 = q3 = q

Replacing these values in the W formula:

Now let's evaluate this formula with

r =2.00 * 10^-15  m

q = 1.6 * 10^-19 C

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

because if the tool that you are using is not balanced it there would be false mass.