Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will .
doubles
decreases by half of half
quadruples
decreases by half

Option a Doubles

It doubles.

If the mass of one of the objects is doubled, then the force of gravity between them is doubled. Since the gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.

the device is called “ rocket engine”

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.