The Laser Interferometer Gravitational-Wave Observatory (LIGO) made the first detection of gravitational waves in 2016. Which of the following best describes the discovery?
A) The detection verified that gravitational waves exist as predicted by the general theory of relativity.
B) The detection of gravitational waves was a huge surprise because no one had predicted they would exist prior to their discovery.
C) There is still considerable doubt whether LIGO really detected gravitational waves.
D) The detection of gravitational waves contradicted predictions made by the general theory of relativity, requiring scientists to revise the theory.
A) The detection verified that gravitational waves exist as predicted by the general theory of relativity.
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A plane moving 200 m/s horizontally fires a projectile with speed 50 m/s in a forward direction 30.0° below the horizontal. At that instant, what is the speed of the projectile with respect to a stationary observer on the ground?
A) 245 m/s B) 250 m/s C) 268 m/s D) 293 m/s
Being the ideal engine, the maximum COP of a Carnot cycle operated in reverse as a refrigerator is
A) (Th/Tc)(1 – Tc/Th)-1. B) 100. C) (1 – Tc/Th)-1. D) (Tc/Th) ? (1 – Tc/Th)-1.
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal. If the index of refraction of water and glass are 1.33 and 1.5, respectively, at what angle (in degrees) does the light leave the glass (relative to its normal)?
a. 26 b. 35 c. 42 d. 22 e. 48
Describe the transport of energy, from the deep interior of the Sun, to when it finally reaches the Earth. Include the various methods of transport
What will be an ideal response?