if the distance between two particles is doubled, what happens to the magnitude of the gravitational force between them?

The two required components for a generator

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up