If an electric charge is rapidly shaken up and down,
A. light is emitted.
B. an electromagnetic wave is produced.
C. electron excitation occurs.
D. sound is emitted.
Answer: B
You might also like to view...
An increase in the severity and frequency of extreme heat can have a serious impact on human mortality in the US because
A) severe heat kills more people than lightning, tornadoes or hurricanes B) decreasing humidity levels increase the 'apparent temperatures' C) experts believe that the most dangerous health threat occurs from very high daytime temperatures rather than the persistence of high temperatures for several days
The fact that solar energy is spread over a larger area in northern latitudes helps to explain why
even though these latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south. Indicate whether the statement is true or false.
Describe two components of glacial movement
What will be an ideal response?
Biological activity by plant roots or tunnelling animals tends to diminish porosity
Indicate whether the statement is true or false