The surface of the sun seems to be about 10,000ºF. What would you guess the rate of heat emission from the sun to be for an area of the sun that measures 1 ft^2?
Fill in the blank(s) with the appropriate word(s).
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What is the most abundant molecule in interstellar clouds besides molecular hydrogen?
A) ammonia B) water C) methane D) molecular helium E) carbon monoxide
An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up? Neglect air resistance
A) 0.52 s B) 1.2 s C) 2.4 s D) 3.1 s E) 4.2 s
Water, ImageO, and methane, CImage, have about the same mass and differ by only one type of atom. Why is the boiling point of water so much higher than that of methane?
A) The water molecule is less symmetrical than is the methane molecule. B) The oxygen of a water molecule has two lone pairs of electrons. C) The electronegativity difference between oxygen and hydrogen is greater than the electronegativity difference between carbon and hydrogen. D) all of the above
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The linear momentum of the crate is __________
Fill in the blank(s) with correct word