Which of the following best defines how rems are used for flexible font sizing.
A. A rem gives a maximum and minimum pixel size for headings and context fonts.
B. Compression is used to reduce or expand font size to match the user's screen.
C. Font size is determined by the user's browser settings, which override the CSS-specified sizes.
D. The font size specified in the HTML document's top-level heading becomes the standard.
Answer: D
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The most distant stars we can measure stellar parallax for are approximately
A) 50 parsecs away. B) 500 parsecs away. C) 5,000 parsecs away. D) halfway across the Milky Way Galaxy. E) in the Andromeda Galaxy.
The potential difference between the plates of a parallel plate capacitor is 35 V and the electric field between the plates has a strength of 750 V/m. If the plate area is 4.0 × 10-2 m2, what is the capacitance of this capacitor?
A) 7.6 × 10-14 F B) 7.6 × 10-12 F C) 7.6 × 10-11 F D) 7.6 × 10-10 F E) None of the other choices is correct.
Retrograde motion
a. is observable for planets located between Earth and the sun. b. is observable for planets more distant from the Sun than is Earth. c. is only observable for the moon. d. is observable for all planets. e. none of the above
The average rate of erosion on the Moon is far less than on Earth because
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.