A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket
A) rises.
B) falls.
C) remains the same.
Answer: C
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Permanent strain is _____________strain.
Fill in the blank(s) with the appropriate word(s).
An individual's eye pupil changes from a diameter of 3.5 mm to 1.4 mm as the illumination is increased. By what factor does the minimum angle of resolution change?
a. 0.5 b. 0.71 c. 2.2 d. 2.5 e. 4.9
During an eclipse of the Sun the high ocean tides on Earth are
A) extra high. B) extra low. C) not significantly different.
A light beam shines through a thin slit and illuminates a distant screen. The central bright fringe on the screen is 1.00 cm wide, as measured between the dark fringes that border it on either side
Which of the following actions would decrease the width of the central bright fringe? (There may be more than one correct choice.) A) increase the wavelength of the light B) decrease the wavelength of the light C) increase the width of the slit D) decrease the width of the slit E) put the apparatus all under water