We can learn a lot about the properties of a star by studying its spectrum. all of the followingstatements are true except one. which one? a. the peak of the star’s thermal emission tells us its temperature: hotter stars peak at shorter (blue) wavelengths. b. the total amount of light in the spectrum tells us the star’s radius. c. we can look at doppler shifts of spectral lines to determine the star’s speed toward or away from us. d. we can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals
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Physics, 22.06.2019 19:30, cierraandgarett8950
The ability to make things happen is also called a. heat b. force c. matter d. energy
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Physics, 22.06.2019 20:20, NNopeNNopeNNope
The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?
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Physics, 23.06.2019 00:00, shauntleaning
What energy transformations occur each time the skateboarder rolls up the ramp?
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We can learn a lot about the properties of a star by studying its spectrum. all of the followingstat...
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