A horizontal desk surface measures 1.3 m by 1.0 m. If the Earth's magnetic field has a magnitude of 0.44 mT and is directed 65
below the horizontal, what is the magnetic flux through the desk surface?
a. 
b. 
c. 
d. 
c.
Physics & Space Science
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____ are crucial in determining the distance to objects that are far away, but still in the Milky Way galaxy
a. RR Lyrae stars b. Cepheid variable stars c. O and B stars d. Emission nebulae e. Supernovae
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Which of the following is the most common type of main-sequence star?
A) an O star B) an A star C) an F star D) an M star E) a G star
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What is the mass of exactly 1 million helium atoms? The atomic mass of helium is 4.00 u.
a. 
b. 
c. 
d. 
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In 1916, Einstein published his__________that described gravity as a curvature of space-time
A) relative theory of consumption B) velocity-addition formulation theory C) density functional theory D) general theory of relativity
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