Imagine another solar system, with a star of the same mass as the Sun. Suppose a planet with a mass twice that of Earth (2MEarth) orbits at a distance of 1 AU from the star. What is the orbital period of this planet?
A) 1 year
B) 6 months
C) 2 years
D) It cannot be determined from the information given.
A) 1 year
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The ____ is the point on the celestial sphere directly above any observer.
Fill in the blank(s) with the appropriate word(s).
The local solar time at 75°W is 12:00 noon. What is the longitude of an observer who sees the full moon on her meridian at this time?
a. 105°E b. 75°E c. 15°E d. 15°W e. None of the above
Suppose Earth's axis tilt was significantly greater than its current 23.5 degrees, but Earth's rotation period and orbital period were unchanged. Which statement below would not be true?
A) Summers and winters would be more severe (for example, hotter and colder, respectively) than they are now. B) The region of Earth where the Sun does not rise on the winter solstice would be larger (extending farther south) than it is now. C) The length of each season (for example, the number of days from the summer solstice to the fall equinox) would be significantly longer than it is now. D) Polaris would not be our North star.
What is the temperature difference across a window if the conductive heat flow rate across it is 20 J/s? The window is 4.5 m2 in area that has an R-value of 2.5 m2 °C/W
What will be an ideal response?