When matter changes from one state to another, what do we call this process?

A.

a physical change

B.

a nuclear change

C.

an explosion

D.

chemical bonding

Jack and jill exercise in a 25.0-m-long swimming pool. jack swims nine lengths of the pool in 2 minutes and 19.5 seconds, while jill, the faster swimmer, covers ten lengths in the same time interval.

A vehicle is only 15% efficient. What happened to to the other 85%.

How many types of protenies are there in all life as we know it

Which statement describes a newton? A. It exists only for objects on Earth. B. It measures the mass of an object. C. It reflects the amount of force an object exerts. D. It states that every object attracts another object.

A base is a substance that can ___ a hydroxide ion. A) donate B) bond with C) accept

What number is between 2000 and 2500

How do aeroplanes fly?

What is constant acceleration?

What is the best conductor of electricity? A. aluminum B. gasoline C. protien D. lipids

A container of water is lifted vertically 3.0m