The distance between adjacent orbits in a hydrogen atom
A) varies randomly with increasing values of n. B) decreases with increasing values of n.
C) remains constant for all values of n. D) increases with increasing values of n.
D
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The early atmosphere of Earth had more methane and ammonia than what is present today. Where did these gases go?
A. Methane and ammonia dissolved in Earth's oceans. B. Sunlight broke methane and ammonia apart and the hydrogen escaped to space. C. Plant life converted methane and ammonia to nitrogen and carbon through photosynthesis. D. Cometary and planetesimal impacts provided enough energy for these gases to escape to space.
The appearance of an aurora indicates that
A. the planet is being bombarded by small meteors. B. there is intelligent life on the planet producing the aurora from below. C. there is a lot of lightning discharges in the planet's atmosphere. D. the planet has a magnetic field.
What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?
What will be an ideal response?
The amount of energy a photon carries depends on its wavelength
a. True b. False Indicate whether the statement is true or false