Diamond and graphite are
a. similar in physical properties.
b. composed of the same element.
c. of the same crystalline structure.
d. bonded in the same manner.
b
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Two bodies revolve around their common center of mass, the balance point of the system
Indicate whether the statement is true or false
Two capacitors with capacitances of 2.0 and 3.6 ?F, respectively, are connected in series. The system is connected to a 40-V battery. What charge accumulates on the 2.0-?F capacitor?
a. 220 ?C b. 31 ?C c. 2 100 ?C d. 51 ?C e. 290 ?C
Capacitors in Combination: The capacitive network shown in the figure is assembled with initially uncharged capacitors. Assume that all the quantities in the figure are accurate to two significant figures. The switch S in the network is kept open throughout. What is the total energy stored in the seven capacitors?
A. 48 mJ B. 72 mJ C. 96 mJ D. 120 mJ E. 144 mJ
These diagrams represent four possible models for the universe. Which model presumes the existence of some type of dark energy in the universe?
A) accelerating universe B) coasting universe C) critical universe D) recollapsing universe E) All four models assume the existence of dark energy.