William and Caroline Herschel attempted to make a map of the Milky Way galaxy by counting the number of stars visible in different directions
a. True
b. False
Indicate whether the statement is true or false
True
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The outer Jovian planets most likely formed from
A) clumps of hydrogen and helium gas spun from a rapidly rotating protosun B) larger collections of hydrogen and helium gas attracting particles of rock and ice to them C) the collision and coalescence of clumps of hydrogen and helium gas within the solar nebula D) planetesimals of rock and ice attracting hydrogen and helium gas from the solar nebula
A disk-shaped space station 125 m in diameter spins at a uniform rate about an axis through its center and perpendicular to the plane of the disk
If the acceleration of a point on the rim of the disk is to be equal to g, how long does it take for the station to make one revolution? Use g = 9.8 m/s2.
How long will it take if she stays in bed all day?
a. 2.41 hours b. 57.8 hours c. 37.7 hours d. 0.228 hours
For a Trombé wall fitted to a twenty story building, the Grashof number is for air flowing through the wall was found to be 25 x 10^12. What is the equivalent Reynolds number for the flow?
What will be an ideal response?