Convection in the outer layers of a star like the Sun helps mixing and makes more hydrogen available for burning.
Answer the following statement true (T) or false (F)
False
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Suppose that hydrogen, rather than iron, had the lowest mass per nuclear particle. Which of the following would be true?
A) Stars would be brighter. B) Stars would be less massive. C) All stars would be red giants. D) Nuclear fusion could not power stars.
When the index of refraction of a transparent material varies with wavelength, the material exhibits
A) density variation. B) polarization. C) dispersion. D) reflection. E) total internal reflection.
Which of the following best describes the composition of the particles forming Saturn's rings?
A) methane ice B) hydrogen and helium C) water ice D) metallic grains E) volcanic rock
The "beta" particle is
A. electromagnetic radiation. B. an electron. C. a helium nucleus. D. two electrons bound to two neutrons.