Rubies are used in electronics

Which of these is an experiment generally regarded as being first carried out by James Joule? observing that objects increase in temperature when heated with fire showing that friction slows down the motion of objects measuring the temperature

You and your friend are having a discussion about weight. He claims he weighs less on the 100th floor of a building that he does on ground floor. Is he correct?

Which of the following is called the windpipe?

A pendulum takes 6.0 seconds to swing through 5 complete cycles. What is the period of the pendulum?

If a decision was made to increase agriculture fertilizer application, which would be an example of a negative trade-off based on this decision? A) excessive nutrients B) farm profits increase C) increase crop production D) consumer prices decrease

Which of the following would not increase the velocity of a sound wave in air? A. increasing the temperature of the air. B. lowering the density of the air. C. lowering the humidity of the air. D.

Is minerals can be solids or liquids

If our planet was without its ocean but otherwise the same as it is today, would surface temperatures be more extreme than they are now (that is, higher high temperatures in summer and lower low temperatures in winter), of less extreme, or what?

A (n) ___ forms where light seems to come from.

How many units measure one wavelength? a 16 b 8 c 2 d 4