A fish appears to be 2.00 m below the surface of a pond when viewed almost directly above by a fisherman. What is the actual depth of the fish? (nwater = 1.33)
A) 2.66 m
B) 0.67 m
C) 1.5 m
D) 0.38 m
A
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The most widely used ceramic is silica in the form of _________.
Fill in the blank(s) with the appropriate word(s).
Which statements are true about a VIRTUAL image? (There may be more than one correct choice.)
A) Its location can be calculated, but it cannot be viewed directly by your eye without using auxiliary lenses. B) It cannot be photographed. C) It cannot be viewed on a screen. D) A plane mirror always forms a virtual image. E) A concave lens always forms a virtual image.
Three boxes in contact rest side-by-side on a smooth, horizontal floor. Their masses are 5.0-kg, 3.0-kg, and 2.0-kg, with the 3.0-kg box in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes
(a) Draw the free-body diagrams for each of the boxes. (b) What magnitude force does the 3.0-kg box exert on the 5.0-kg box? (c) What magnitude force does the 3.0-kg box exert on the 2.0-kg box?
On the autumnal equinox, the Sun is:
A) 23.5° north of the celestial equator. B) 23.5° south of the celestial equator. C) on the celestial equator and moving north with respect to the equator. D) on the celestial equator and moving south with respect to the equator.