In 4 2 he 24he , what does the number 4 indicate?

The number 4 indicates the mass number of the element.

Explanation:

The mass is defined as the number of nucleons in the nucleus of the element.

Let an element is

Here Z is the number of protons in the nucleus

A be the number of nucleons in the nucleus

The number of nucleons is the sum of number of protons and the number of neutrons.

So, the number of protons in the nucleus are Z, number of neutrons are A - Z in the nucleus.

Thus, 4 indicates the sum of number of protons and the neutrons.

your answer is c! hope this : )

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.