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Physics, 12.10.2020 22:01 birdwithpurpleboots
What is the main role of the cell membrane?
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Physics, 22.06.2019 19:00, arianaaldaz062002
According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?
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Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
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