The advantage of a convex mirror is that it has a __________ field of view
a. narrow b. linear
c. wide d. open
c
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Thin Lenses: A cell phone is placed 40 cm in front of a converging lens with a focal length of magnitude 20 cm. How far is the image of this phone from the lens?
A. 40 cm B. 20 cm C. 13 cm D. 60 cm E. 10 cm
In ________ stars most of the electrons in the hydrogen atom are above level 2 and in ________ stars most of the electrons are below level 2, therefore the ________ are essentially absent in both types.
A. type O; type A; emission lines B. type M; type A; absorption lines C. type A; type M; emission lines D. type M; type O; Balmer lines E. type O; type M; Balmer lines
Which of the following mathematical expressions should be used to calculate the momentum of an auto?
A. mass × velocity B. weight × speed C. weight × force D. mass × acceleration
Nearly all meteors are material from _______________
Fill in the blank(s) with correct word