How can detection and study of gravitational waves enhance our understanding of the universe?
What will be an ideal response?
Gravitational waves are produced in some of the more exotic events found in astronomy. Examples include (1 ) the merger of a binary-star system, (2 ) the collapse of a star into a black hole, and (3 ) the collision of two black holes. Also, a binary system with two neutron stars could produce significant amounts of gravitational radiation. A study of this radiation can tell us much about the physical conditions of these objects and events. They are also predicted by Einstein in his General Theory of Relativity.
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When an electron collides with a positron producing a pair of high gamma rays, we call this process
A) pair production B) matter obliteration C) photodisintegration D) annihilation
Why do the jovian planet interiors differ?
A) Accretion took longer further from the Sun, so the more distant planets formed their cores later and captured less gas from the solar nebula than the closer jovian planets. B) They differ due to giant impacts at the late stages of planet formation. C) The more distant planets had longer to form than the closer planets, since the solar nebula lasted longer at greater distances from the Sun. D) The more distant planets formed in a cooler region of the solar nebula and therefore contain a greater proportion of ices than the closer jovian planets.
An object 50-cm high is placed 1.0 m in front of a converging lens whose focal length is 1.5 m. Determine the image height (in cm)
a. 77 b. 150 c. 52 d. 17 e. 83
Quarks can only have a charge of +(2/3)e or -(1/3)e, while antiquarks can only have charges of -(2/3)e or +(1/3)e
Indicate whether the statement is true or false