What do gamma rays, X-rays, light, and radio waves all have in common?
What will be an ideal response?
While they vary widely in wavelengths and frequencies, they are all forms of electromagnetic radiation and all travel at c, the speed of light, in a vacuum.
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When an atom emits light, an electron in it moves from a higher to a lower energy level.
Answer the following statement true (T) or false (F)
A wire carries a steady current of 0.1 A over a period of 200 s. What total charge passes through the wire in this time interval?
a. 2 C c. 0.005 C b. 200 C d. 20 C
The most circular of the elliptical galaxies are class
A. Sb. B. E7. C. Irr 1. D. E0. E. Ea.
A 2.00 kg-ball has zero kinetic and potential energy. Ernie drops the ball into a 10.0-m deep well. Just before the ball hits the bottom, the sum of its kinetic and potential energy is:
a. zero. c. -196 J. b. 196 J. d. 392 J.