A K? x-ray corresponds to the missing electron orbital on an atom going from 1s to _________.
Fill in the blank(s) with the appropriate word(s).
3p
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A simply supported wood beam (L 5 5 m) with rectangular cross section (b 5 200 mm, h 5 280 mm) carries uniform load q 5 6.5 kN/m includes the weight of the beam. The maximum flexural stress is approximately:
(A) 8.7 MPa
(B) 10.1 MPa
(C) 11.4 MPa
(D) 14.3 MPa
) Based on observations, which of the following statements about stars in the Milky Way is generally true?
A) the older the star, the lower its abundance of heavy elements B) the older the star, the bluer its color C) the older the star, the faster its orbital speed D) the younger the star, the higher its mass E) the less massive the star, the older it is
Two blinking warning lights are 1000 ns apart along a railroad track. A train moves from west to east at a speed of 0.5. In the train frame, an observer registers flashes from each light, and after correcting for light travel time, concludes that the east light flashed 200 ns before the west light flashed. Which light flashed first in the ground frame?
A. The east light flashes before the west light. B. The west light flashes before the east light. C. The lights flash simultaneously. D. One does not have enough information to say.
As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
a. greater than the tension would be if the box were stationary. b. greater than the weight of the box. c. equal to the weight of the box. d. less than the weight of the box.