What is meant by 'wasted energy'?

How is wavelength related to the different colors we see in a rainbow?

Which of the following results when a crest and trough meet? A. nothing B. no interference C. constructive interference D. destructive interference

To be a healthy family, which of the statements below is TRUE: A. Family members need to be perfect. B. Family members must include a mom, dad, and children. C. Family members try to work out differences together. D.

If the Sun were twice as massive, its pull on Mars would be A. unchanged. B. twice. C. half. D. four times as much.

In Figure 13-2, is the pressure greater in the area of the bottle outside of the tube (D) or inside of the tube (B) ?

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.