A substance made of two or more elements is called a what

An ice cube that is dropped into a glass of water melts because

Consult Multiple Concept Example 10 in preparation for this problem. Traveling at a speed of 15.4 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes.

Which method of separation can be used for a heterogeneous mixture? A. by distillation B. by densities C. by chromatography D. by acidification

Pure water is neutral. What is appropriate justification for this?

Which is the best explanation of how the Moon formed? The Moon was formed using chunks of Earth. The Moon was formed in a planetary disk. The Moon was formed by the Big Bang. The moon was formed when asteroids collided with each other.

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.