In binary neutron star systems, the orbits are expected to slowly decay, eventually resulting in a merger of the neutron stars. Where does the orbital energy go?
A) It is lost to friction.
B) It is emitted as gamma-rays.
C) It is emitted as neutrinos.
D) It is emitted as gravity waves.
E) It is converted to mass.
D
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Indicate whether the statement is true or false
Why couldn't Newton determine the value of the gravitational constant?
a. The constant was too large to measure with existing instruments. b. The constant was too small to measure with existing instruments. c. If the gravitational constant were known, the mass of Earth could be calculated. d. Although Newton believed there was a constant, no one has ever discovered one. e. Although the right equipment and techniques for this measurement existed, Newton did not have access to them.
A magnifying lens has a focal length of 10 cm. A person has a near point of 25 cm and a far point at infinity. What is the angular magnification of the lens for that person when their eyes are focused at infinity?
What will be an ideal response?
Emission nebulae occur only near stars that emit large amounts of ________ electromagnetic radiation
A) infrared B) radio C) visible light D) ultraviolet E) X-ray