A K? x-ray results from which of the following electron transitions in an excited atom?
(a) 2s?1s
(b) 2p?1s
(c) 3p?1s
(d) 3p?2s
(c) 3p?1s
Physics & Space Science
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Which of these strongly relate to a saxophone and clarinet?
A) vibrating air B) length of tube. C) both of these D) neither of these
Physics & Space Science
The molecule is the basic unit of all
a. elements. b. compounds. c. mixtures. d. solutions.
Physics & Space Science
An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?
a. 8.0 m/s b. 9.6 m/s c. 12 m/s d. 6.9 m/s e. 0.20 m/s
Physics & Space Science
Newtonian physics tells us that Kepler's second law is a result of the conservation of ____
a. angular momentum b. linear acceleration c. energy d. mass e. velocity
Physics & Space Science