What type of substance is always made up of a single type of atom?

A car travels northwest for 2 hours and covers a distance of 90 miles. What is the average velocity of the car? a 36 mi/h northwest b 42 mi/h northwest C 40 mi/h northwest d 45 mi/h northwest

Which statements are true about the flow of blood in the body? Check all that apply.

A neutral balloon is rubbed with a piece of wool cloth. As a result, the balloon has a negative static charge. Which of the following statements best explains why the balloon has a negative charge? A. The balloon is a conductor. B.

Which is a drawback to the extensive use of solar energy? A. It is nonrenewable and usually unavailable at night. B. It produces toxic pollution. C. It requires equipment and installation that are expensive. D. It is available only at night.

The distance from the top of one sound wave to the top of the next sound wave is called

Jose wandered 4 kilometers at 2 kilometers per hour. How long did Jose wonder?

26. What are the 2 conditions required for work to occur?

What's another name for pure substance

How could you demonstrate that visible white light is composed of many different colours?

1500 Joules of work are done lifting a 500 N weight. How high was the weight raised as a result of this work?