Suppose you live in the United States and you see a crescent moon in your evening sky tonight. What will a friend in South America see tonight?
A) Your friend will see a gibbous moon.
B) Your friend will also see a crescent moon.
C) Your friend will see a first-quarter moon.
D) Your friend won't see the Moon tonight because it is up only in the morning.
B) Your friend will also see a crescent moon.
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The electrical conductivity of copper and nickel material at room temperature are 6.0×107 (??m)-1 and 2.0×107 (??m)-1 , respectively. Copper and nickel form a solid solution at low concentrations at room temperature. If an alloy of nickel plus 5 atom % copper produced from these materials has an electrical resistivity of 11×10-8 ??m, what would be the electrical resistivity of an alloy of nickel plus 10-atomicpercent copper? You may assume that these are dilute solutions.
What will be an ideal response?
The fact that light can be polarized shows that light is
a. polar. b. monochromatic. c. an electromagnetic wave. d. a transverse wave.
A convex spherical mirror has a focal length of magnitude 20 cm. If an object is placed 10 cm in front of the mirror on the mirror's axis, where is the image located?
A) 20 cm behind the mirror B) 20 cm in front of the mirror C) 6.7 cm behind the mirror D) 6.7 cm in front of the mirror
In addition to revolving around the Sun counterclockwise, most planets also rotate on their axis counterclockwise
Indicate whether the statement is true or false