Process of Science: How do we know what is going on in the center of the Sun so well if we cannot see it or send spacecraft to it?
What will be an ideal response?
We can apply our knowledge of how gases behave at different temperatures and densities, which is testable in laboratory environments, to make a mathematical model of the Sun. These models make predictions about how bright and how big the Sun is, which we can then compare with observations. We also use observations of vibrations on the Sun to learn about its interior structure in much the same way we use seismic testing on Earth. Finally, we can test our knowledge of nuclear physics and the fusion process in the core using observations of solar neutrinos.
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A nonuniform linear charge distribution given by ?(x) = bx, where b is a constant, is distributed along the x axis from x = 0 to x = +L. If b = 40 nC/m2 and L = 0.20 m, what is the electric potential (relative to a potential of zero at infinity) at the point y = 2L on the y axis?
A. 19 V B. 17 V C. 21 V D. 23 V E. 14 V
Orion is visible on winter evenings but not summer evenings because of
A) the location of Earth in its orbit. B) baseball on television. C) interference from the full moon. D) the precession of Earth's axis. E) the tilt of Earth's axis.
The moon ________ may have erupted to create the E rings around Saturn
Fill in the blank(s) with correct word
Enzo throws a rock horizontally with a speed of 12 m/s from a bridge. It falls for 2.28 s before reaching the water below with no appreciable air resistance. Just as the rock reaches the water, find
(a) the horizontal component of its velocity. (b) the speed with which it is moving.