Which quantities are scalars?​

The center of the milky way most likely contains a. empty space. b. a red giant star. c. a globular cluster. d. a supermassive black hole.

Atrain flies at a speed of 350 miles per hour how far will it travel in 3 hours

In the equation for the gravitational force between two objects, which quantity must be squared? m1 m2 g d