When the reflection of an object is seen in a concave mirror the image:
a. will always be enlarged. c. will always be virtual.
b. may be either real or virtual.
d. will always be real.
B
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The Sun's location in the Milky Way Galaxy is
A) very near the galactic center. B) in the halo of the galaxy, about 28,000 light-years above the galactic disk. C) at the very outer edge of the galactic disk. D) in the galactic disk, roughly halfway between the center and the outer edge of the disk.
What is the ecliptic?
A) the path the Sun appears to trace around the celestial sphere each year B) the Sun's daily path from east to west in our sky C) the path traced by the Moon's shadow on Earth during a solar eclipse D) a half-circle extending from your horizon due north, through your zenith, to your horizon due south
The study of minerals is called ______________
Fill in the blank(s) with correct word
Conversion of Units: Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of the tube is 0.845 m, and the inside diameter of the tube is 2.40 mm, what is the area of the poster expressed in square centimeters to the correct number of significant figures? (Assume the poster is just as long as the tube and does not overlap itself.)
A. 202.8 cm2 B. 637.1 cm2 C. 203 cm2 D. 319 cm2 E. 637 cm2