What happens to the gravitational force between any two bodies if the mass of a body is doubled keeping the distance between two bodies constant?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.