3 Which of the following is not likely to be evidence of a chemical change?

A. a form of matter changes state

B. a substance emits beat and light

C. carbon dioxide, water, and ash are produced

D. the matter shows signs of rusting

An object with negative charge is placed in a region of space where the electric field is directed vertically upward. What is the direction of the electric force exerted on this charge?

When you are noting the results of your decision, you will?

In DC motor, the split rings are made of A) steel B) copper C) wood D) glass

How do polar bears use albedo to survive

Which of the following best describes the behavior of silica rich magma A. Highly viscous and associated with violent eruptions B. Highly viscous and associated with quiet volcanic eruptions C. Stays deep within earth because of low viscosity D.

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?