A _____________ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons
a. black hole
b. neutron star
c. white dwarf
d. supernova remnant
e. red dwarf
B
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Of all his laws, Kepler was proudest of the third. Why was it so appealing in his search for cosmic harmony?
What will be an ideal response?
A carbon-14 nucleus decays to a nitrogen-14 nucleus by beta-minus decay. How much energy (in MeV) is released if carbon-14 has a mass of 14.003242 u and nitrogen-14 has a mass of 14.003074 u? (1 u = 931.5 MeV/c2)
A) 0.0156 MeV B) 0.156 MeV C) 1.56 MeV D) 15.6 MeV
Rotational Dynamics: A 385-g tile hangs from one end of a string that goes over a pulley with a moment of inertia of 0.0125 kg ? m2 and a radius of 15.0 cm. A mass of 710 g hangs from the other end of the string. When the tiles are released, the larger one accelerates downward while the lighter one accelerates upward. The pulley has no friction in its axle and turns without the string slipping. What is the tension in the string on the side of the 710-g tile?
A. 9.77 N B. 6.87 N C. 5.59 N D. 4.41 N E. 3.68 N
In 1851, Earth's rotation was demonstrated using a(n) ______________
Fill in the blank(s) with correct word