Does the change of height affect the value of g?

Yes, change of height affect the g.

Explanation:

As gravity is indirectly proportion to height. So when,height increases gravity decrease and when the height decrease gravity increase.

no. dot product   =0 when vecs at right angles

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by