Answer:
mass of an object
Explanation:
because mass of an object changes it’s force
 
        
             
        
        
        
Answer:
 is the rock's speed.
 is the rock's speed.
Explanation:
Momentum is defined as motion possessed by the moving body's mass. Mathematically it a product of mas and velocity of the body.

Given : Mass of rock = m = 1.45 kg
Velocity of the rock = v
Momentum of the rock = P =


 is the rock's speed.
 is the rock's speed.
 
        
             
        
        
        
It is a chemical change and a physical change
        
             
        
        
        
Vaporization of a sample of liquid is a phase transition from the liquid phase to the gas phase.
        
             
        
        
        
the earth exerts a gravitational force