In comparison with other fundamental forces, the universal gravitational constant G indicates that gravity is
A) very weak.
B) strong.
C) very strong.
Answer: A
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A 3.0 ? resistor is connected in parallel with a 6.0 ? resistor. This combination is connected in series with a 4.0 ? resistor. The resistors are connected to a 12. volt battery. How much power is dissipated in the 3.0 ? resistor?
A) 12 W B) 5.3 W C) 7.7 W D) 6 W E) 2.7 W
Quasars ____
a. are common at all ages of the Universe b. are the early stages of what become Seyfert galaxies c. disrupt galactic formation and become isolated black holes d. are an early stage of the formation of common galaxies e. are formed from double-lobed radio galaxies
Mass number refers to the number of
A) protons in the nucleus. B) neutrons in the nucleus. C) nucleons in the nucleus.
It was the distribution of ________ that showed Harlow Shapley we were nowhere near the center of the Milky Way early in the 20th century
A) planetary nebulae B) emission nebulae C) open clusters D) globular clusters E) supernova remnants