The angle between two plane mirrors that meet at one edge is 45°. The change in direction of a ray that strikes the first mirror at a 60° angle of incidence when that ray reflects from the second mirror is

a. 0°.
b. 45°
c. 90°
d. 150°
e. 270°


D

Physics & Space Science

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Fill in the blank(s) with correct word

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A _________ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons

a. black hole b. neutron star c. white dwarf d. supernova remnant e. red dwarf

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An electron is moving atm/s at an angle of 40 to a 0.80 T magnetic field. What is the magnitude of the acceleration of the electron?

A.
B.
C.
D.
E.

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A. It is more massive than all other planets combined. B. It may become a star in about a billion years. C. It is the least dense of the Giant Planets. D. It has a solid core of ice about 1,000 km under the visible surface.

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