What is Brewster's angle for light traveling in vacuum and reflecting off a piece of glass having a refractive index of 1.52?
A) 48.9°
B) 33.3°
C) 48.1°
D) 56.7°
E) 41.1°
D
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The process of expanding a parison with air pressure to form a bottle is called ___________molding.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. The mass of the earth–moon system is somewhat less than the sum of the mass of the earth and the mass of the moon. 2. If the activity of a radioactive sample has decreased by a factor of 4 in time T, then T = 2t1/2.
In order for you to get out of bed with the least amount of work, would it be better for your bed to be on the floor or a meter high?
A) It makes no difference, because you must change your position from lying down to standing up in either case. B) It makes no difference, because the total amount of physical work done in either case is zero. C) Both of the above. D) It would be better for the bed to be on the floor, because then you would not need to do as much work to get your feet down onto the floor. E) It would be better for the bed to be a meter high, because then you would not need to do as much work in lifting yourself to your feet.
When an electron goes from the ground state to an excited state,
a. energy is emitted. b. a photon is absorbed. c. a photon is emitted. d. none of these occur.