Answers: 3
Physics, 21.06.2019 23:30
Aquarterback pedals 3.3meters southward and then run 5.7meters northward. whats the distance ? and whats the displacement?
Answers: 2
Physics, 22.06.2019 00:30
Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’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 16:20
Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow
Answers: 1
Physics, 22.06.2019 21:00
On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?
Answers: 3
are receptor molecules on mammalian cells that recognize macromolecules that are present in or on ce...
Mathematics, 22.08.2019 23:00
Chemistry, 22.08.2019 23:00
Mathematics, 22.08.2019 23:00
Biology, 22.08.2019 23:00
History, 22.08.2019 23:00
World Languages, 22.08.2019 23:00
Physics, 22.08.2019 23:00
Biology, 22.08.2019 23:00
Mathematics, 22.08.2019 23:00
Physics, 22.08.2019 23:00
History, 22.08.2019 23:00
Geography, 22.08.2019 23:00
History, 22.08.2019 23:00
Mathematics, 22.08.2019 23:00
Mathematics, 22.08.2019 23:00