What does it mean when a mineral has a definite chemical composition? Select 2 choices.

What should be changed to make the following sentence true? ""acrophobia is characterized by intense fear

the acceleration of a body in free fall depends on the place or the world in which it is, true or false?

Mr. Smith and his wife were trying to move their new chair. Mr. Smith pulls with a force of 30 N while Mrs. Smith pushes with a force of 25 N in the same direction. What is the net force?

The sum of potential and kinetic energies in the particles of a substance is called

To stop a 4.1 kg car moving at 9.2 m/services in 7.5 seconds requires a force of newtons

In which scenario is the least amount of work done on a crate? A force of 120 N moves it 25 m. A force of 115 N moves it 26 m. A force of 130 N moves it 22 m. A force of 125 N moves it 27 m.

The spacing and distribution of individuals within a population is known as

A biker going around a circular track at constant speed is accelerating. Why? A. Direction is constantly changing B. Gravity is pulling on it C. The speed us changing D. The earth is rotating

A ball is thrown from the top of one building toward a tall building 50 m away. The initial velocity of the ball is 20 m/s at 40° above the horizontal. How far above or below its original level will the ball strike the opposite wall?

Jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance. In free fall, will the crumpled or flat paper reach the ground first? The crumpled paper will reach the ground first.