What causes precession?
What will be an ideal response?
The Sun and Moon trying to make the Earth's axis perpendicular to the ecliptic.
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: Compare the relative reflected intensity in air from the surface of sodalime silica glass with an index of refraction of 1.51 and dense optical flint glass with and index of refraction of 1.65.
What will be an ideal response?
In what sense do telescopes function as "time machines"?
A) They allow us to observe individual stars and galaxies as they change with time. B) Some of the oldest telescopes are still in use today. C) They allow us to see distant objects as they were in the distant past. D) They allow us to see the Milky Way Galaxy as it was when it was much younger.
Consider an equilateral triangle of side 20. cm. A charge of +2.0 ?C is placed at one vertex and charges of -4.0 ?C are placed at the other two vertices. Determine the magnitude and direction of the electric field at the center of the triangle
What will be an ideal response?
A(n) ______________ is a nonchemical combination of two or more substances in variable proportions
Fill in the blank(s) with correct word