The Earth's inner core is about the same temperature as the surface of the Sun
Indicate whether the statement is true or false
TRUE
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Why did Hubble conclude the universe must be expanding?
What will be an ideal response?
You see colors in a rainbow because of
a. interference b. diffraction c. specular reflection d. dispersion e. polarization
If in a double-slit experiment the wavelength of light is increased, which of the following happens to the interference pattern shown on the screen?
A) The maxima get further apart. B) The maxima stay at the same position. C) The minima and maxima stay at the same position. D) The minima get closer together. E) The minima stay at the same position.
Does Hubble's law work well for galaxies within the Local Group? Why or why not?
A) no, because galaxies in the Local Group are gravitationally bound together B) no, because Hubble did not know the Local Group existed when he discovered his law C) no, because we do not know the precise value of Hubble's constant D) Yes, it works so well that we have never detected any measurable deviations from its predictions.