Is there a connection between population growth and energy use? Explain
What will be an ideal response?
Yes, absolutely. In most cases, the more people, the greater the energy use.
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According to our theory of solar system formation, what are asteroids and comets?
A) leftover planetesimals that never accreted into planets B) the shattered remains of collisions between planets C) chunks of rock or ice that condensed after the planets and moons finished forming D) chunks of rock or ice that were expelled from planets by volcanoes
What is a "pulsating star"?
A. a star whose mass changes as it comes into contact with another star B. a rotating neutron star that emits radio waves in a narrow beam C. a star whose luminosity changes as it regularly expands and contracts D. a planetary nebula
A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation 5 m above ground level. The ball lands 20 m downrange. The player's pitching speed is about
A) 5 m/s. B) 10 m/s. C) 20 m/s. D) 25 m/s. E) none of the above
When atoms of two elements with a great difference in electronegativity bond together, the bonding is probably
a. ionic. b. polar covalent. c. covalent. d. metallic.