Two metal balls are charged. Ball A has a charge of +7 and ball B has a charge of -3. What will the charge on these balls be after they come into contact and then are separated?

+2

Explanation:

When in contact, the net charge on the balls will be given by getting the sum of the two charges, considering the signs hence net charge will be+7+-3=+4

Now, with the above net charge, when separation occurs, the charges are divided equally hence :

Therefore, the charge on these balls after coming into contact then separated will be +2 as calculated above.

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

a.   mass number from atomic number