Physics, 02.10.2019 16:20 shaylawaldo11
How did elements with more than 2 protons, such as the carbon in our cells, form? a. they formed 400 million years after the universe formed in giant fusion reactors known as stars.
b. they formed from hydrogen and helium slamming into each other in the first few minutes after the big bang.
c. they are formed when lighter elements are pulled together by gravity to form a planet.
d. they were formed at the same time as hydrogen and helium right after the big bang.
Answers: 2
Physics, 22.06.2019 11:30
With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90
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Physics, 22.06.2019 21:40
Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.
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Physics, 22.06.2019 21:50
Ajoint produces movement when its angle decreases. which type of movement is it?
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Physics, 23.06.2019 00:30
What is the speed vfinal of the electron when it is 10.0 cm from charge 1?
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How did elements with more than 2 protons, such as the carbon in our cells, form? a. they formed 40...
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