Physics, 04.08.2019 04:10 ChasityN8491
Galaxy a is located 200 million light-years from earth, while galaxy b is located 600 million light-years from earth. according to the hubble law, how does the motion of the two galaxies compare?
a. galaxies a and b are moving away from earth at the same rate.
b. galaxy a is moving away from earth three times as fast as galaxy b.
c. galaxy b is moving away from earth three times as fast as galaxy a.
Answers: 3
Physics, 22.06.2019 00:30
Comedians like to joke that the reason we havenââŹâ˘t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earthââŹâ˘s broadcasts of intellectually embarrassing tv programs, like gilliganââŹâ˘s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. letââŹâ˘s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame
Answers: 2
Physics, 22.06.2019 09:30
Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z
Answers: 3
Physics, 22.06.2019 17:00
Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.
Answers: 3
Physics, 22.06.2019 18:00
Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.
Answers: 1
Galaxy a is located 200 million light-years from earth, while galaxy b is located 600 million light-...
English, 12.12.2019 18:31
English, 12.12.2019 18:31
Mathematics, 12.12.2019 18:31
Mathematics, 12.12.2019 18:31
Mathematics, 12.12.2019 18:31
Mathematics, 12.12.2019 18:31
English, 12.12.2019 18:31
Mathematics, 12.12.2019 18:31
History, 12.12.2019 18:31