Our whole galaxy is about ____ times larger in size.
A.) 100.
B.) 1,000.
C.) 10,000.
D.) 100,000.
E.) 1,000,000.
Ans: C.) 10,000.
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If you arrange the following 15 bits (111001111100111 ) into 5 rows of 3 bits starting with the first bit, what number does it spell out?
A) 2 B) 3 C) 5 D) 1
Which statement correctly describes the role of dark matter in galaxy formation?
A) Where baryons collect, dark matter follows. B) Dark matter plays very little role in galaxy formation. C) Where dark matter collects, the baryons follow.
An FM station broadcasts at a frequency of 100 MHz. The wavelength of its carrier wave is ________
Fill in the blank(s) with correct word
What happens when a charged insulator is placed near an uncharged metallic object?
1.They repel each other. 2.They attract each other. 3.They may attract or repel each other, depending on whether the charge on the insulator is positive or negative. 4.They exert no electrostatic force on each other. 5.The charged insulator always spontaneously discharges.