Physics, 24.07.2019 14:30 dwilliams635
If a sample shows only one-fourth of its estimated original quantity of 14c, how old is it? think about half-lives; don't try to just plug into the decay equation. (you shouldn't need to plug into it at all for this problem.
Answers: 1
Physics, 21.06.2019 17:20, moneywaydaedae
Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
Answers: 1
Physics, 22.06.2019 00:00, sydneydavis57
Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?
Answers: 1
Physics, 22.06.2019 10:00, squirrel6875
There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.
Answers: 1
Physics, 22.06.2019 21:20, payshencec21
People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. 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 2.05cm in front of the eye.)
Answers: 3
If a sample shows only one-fourth of its estimated original quantity of 14c, how old is it? think a...
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