Using the ideas discussed in your textbook, in what sense are we "star stuff"?

A) Movie stars and other people are all made of the same stuff, so we all have the potential to be famous.
B) The overall chemical composition of our bodies is about the same as that of stars.
C) We could not survive without light from our star, the Sun.
D) Nearly every atom from which we are made was once inside of a star.


D

Physics & Space Science

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Considering the three general types of geometry (flat, spherical, and saddle-shaped). If the spacetime of the universe is infinite, what might the geometry of the universe be?

A) either flat or saddle-shaped B) flat, spherical, or saddle-shaped C) only flat D) either flat or spherical E) only spherical

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The amount of carbon dioxide in Earth's atmosphere has been increasing over the last 50 years because of

a. global warming. b. the growth of the ozone hole. c. the burning of fossil fuels. d. increased energy output from the Sun. e. increased magnetic activity in the Sun.

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What is the best place to stand to view a total solar eclipse?

prenumbra anywhere annular shadow umbra

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A 25 cm focal length mirror has a 3.0 cm tall object placed 20 cm in front of it. Where is the image, and is it real or virtual?

A. 5.0 cm behind the mirror, virtual B. 11 cm in front of the mirror, real C. 100 cm in front of the mirror, real D. 100 cm behind the mirror, virtual E. 45 cm behind the mirror, virtual

Physics & Space Science