Which of the following describes a physical change? a. formation of a new substance caused by combining substances
b. water changing from liquid to gas through evaporation or boiling
c. formation of a new substance caused by application of heat

B. Water changing from liquid to gas through evaporation or boiling.

Explanation:

The physical change can be define as the change in the physical form of the matter without changing it's chemical composition. These change are observable in the appearence, texture, color, shape and size of the matter.

B. is the correct option as there is no change in the chemical composition of water instead there is a change in the physical form that is from liquid to gas.

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?