31. If it is 10:00 A.M. MST in Colorado Springs, what is the time in Washington
ID: 3144593 • Letter: 3
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31. If it is 10:00 A.M. MST in Colorado Springs, what is the time in Washington D.C., the longitude of which is 30° to the east? A) 12 noon EST B) 1:00 P.M. EST C) 1:00 A.M. EST D) 10:00 A.M. EST 32. The A) Roman B) Julian C) Gregorian D) Babylonian calendar is most used around the world. 33. Six months of night at the South Pole begins when the Sun is at the A) winter solstice. B) summer solstice C) autumnal equinox. D) vernal equinox. 34. Density describes A) mass per unit volume. B) length per unit time .C) volume per liter. D) weight per mass. 35. Rounding the number 520.661 to four significant figures gives A) 521.0 B) 5216.2 C) 520.6 D) 520.7 E) cannot be done 36. Expressed in standard powers-of-10 notation and rounded to two significant figures, the number 636.48 is A) 6.4 x 10. B) 64 x 10. C) 6.4x 102. D) 6.3 x 10.Explanation / Answer
31) It will be 12 noon EST.
32) The Gregorian calendar is internationally the most widely used civil calendar. It is named after Pope Gregory XIII, who introduced it in October 1582. The calendar was a refinement to the Julian calendar involving a 0.002% correction in the length of the year.
33)
What is unusual about the Pole, is that the sun stays at that elevation the whole day. It does not rise in the morning, nor go down in the evening – it merely circles the horizon at the same elevation throughout the 24 hours. But from solstice day it will start a slow descent towards winter and obscurity, gradually spiralling down until it finally goes below the horizon in late March. That sunset, at the autumnal equinox, will be the only one at the South Pole next year. At other latitudes the equinox is when days and nights are equally long; at the South Pole it is when the day ends and the night begins. Sunrise comes 6 months later! On the North Pole the situation is completely reversed, so anyone sitting up there in December will be right in the middle of an equally long night.
Autumnal equinox
34) A
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is (the lower case Greek letter rho), although the Latin letter D can also be used.
35) D...520.7
36) A
What is unusual about the Pole, is that the sun stays at that elevation the whole day. It does not rise in the morning, nor go down in the evening – it merely circles the horizon at the same elevation throughout the 24 hours. But from solstice day it will start a slow descent towards winter and obscurity, gradually spiralling down until it finally goes below the horizon in late March. That sunset, at the autumnal equinox, will be the only one at the South Pole next year. At other latitudes the equinox is when days and nights are equally long; at the South Pole it is when the day ends and the night begins. Sunrise comes 6 months later! On the North Pole the situation is completely reversed, so anyone sitting up there in December will be right in the middle of an equally long night.
Autumnal equinox
34) A
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is (the lower case Greek letter rho), although the Latin letter D can also be used.
35) D...520.7
36) A
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