Iβm going to try one more time to ask for help
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Mark brainliest!!
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Physics, 22.06.2019 00:30
Comedians like to joke that the reason we havenΓ’β¬β’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earthΓ’β¬β’s broadcasts of intellectually embarrassing tv programs, like gilliganΓ’β¬β’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. letΓ’β¬β’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
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Physics, 22.06.2019 12:00
Explain what happens at the saturation point when adding salt to water at room temperature.
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Physics, 22.06.2019 18:30
Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?
Answers: 3
Physics, 23.06.2019 06:30
If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be a. equal to the weight of the car. b. less than the force of friction exerted upon the car. c. equal to the force of friction exerted upon the car. d. greater than the weight of the car.
Answers: 1
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