In a binary system containing two neutron stars, the objects will ____
a. radiate orbital energy away as gravitational radiation and move farther apart
b. radiate orbital energy away as gravitational radiation and move closer together
c. exchange mass until their orbital periods become equal
d. exchange mass until they are in synchronous rotation
e. exchange angular momentum, lengthening the period of the pulsar
b
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Which of these is NOT true about supernovae?
A) Type I involves carbon detonation. B) Type II involves formation of iron in the core. C) The two types are both closely related to evolution of white dwarfs. D) The one in 1987 in the Large Magellanic Cloud was of type II. E) Neutronization is vital in understanding type II core collapse.
Nebular theory predicts that other solar systems that formed in the same way should also have 8 planets
Indicate whether the statement is true or false
What's the Big Bang?
a. the creation of the universe b. microwave radiation from all directions in the sky c. the Hubble relation d. a punk rock band
The "average speed" of a trip by car describes:
a. the speed on the odometer at a given moment. b. a speed that remains the same throughout the whole trip. c. the distance traveled divided by how long it took. d. how long the trip usually takes. e. the speed at which most people drive for the trip.