A circuit consists of 2N resistors, all of resistance R, connected as shown below. A potential difference V is applied to one end, and the other end is at ground potential. The equivalent resistance of the circuit is
a.
.
b.
R.
c.
c
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The masses of the Moon and Earth are 7.4 ´ 1022 kg and 6 ´ 1024 kg, respectively. Earth-Moon distance is 3.8 ´ 108 m. What is the size of the gravitational force between Earth and the Moon? The gravitational constant is G = 6.67 ´ 10-11 N-m2/kg2.
A. 2.05 ´ 1020 N B. 7.79 ´ 1028 N C. 3.07 ´ 1030 N D. 1.17 ´ 1039 N
______________ is the study of the compounds and reactions that occur in living cells
Fill in the blank(s) with correct word
What is the ratio of the relativistic momentum to the classical momentum?
a. 
b. 
c. 
d. 
e. 
A method for identifying a black hole is to
A) search for radio waves from the accretion disk. B) locate a visible star that disappears when the black hole passes in front of it. C) search for their pulsar signal. D) look for voids in the star fields. E) look for its effects on a nearby companion.