A block of ice at 0°C is added to a 150. g aluminum calorimeter cup that holds 200. g of water at 10°C. If all but 2. g of ice melt, what was the original mass of the block of ice?
A) 47.6 g
B) 38.8 g
C) 62.2 g
D) 42.0 g
E) 31.1 g
E
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An astronomical unit (AU) is the average distance from the Earth to the Sun. An comet in orbit around the Sun has a perihelion (near point to the Sun) of 0.50 AU and an aphelion (far point from the Sun) of 5.0 AU. If the comet's orbital speed at aphelion is v, what is its speed at perihelion?
a. 11v c. 5.5v b. 10v d. 4.5v
Spherical Mirrors: Sometimes when you look into a curved mirror you see a magnified image (a great big you) and sometimes you see a diminished image (a little you). If you look at the bottom (convex) side of a shiny spoon, what will you see?
A. You won't see an image of yourself because no image will be formed. B. You will see a little you, upside down. C. You will see a little you, right side up. D. You will see a little you, but whether you are right side up or upside down depends on how near you are to the spoon. E. You will either see a little you or a great big you, depending on how near you are to the spoon.
Which of these are physical quantities?
a. time b. energy c. seconds d. kilometers e. volume
What is the most important reason why an icy moon is more likely to be geologically active than a rocky moon of the same size?
A) Ice is less rigid and has a lower melting point than rock. B) Ice is colder than rock. C) Ice contains more radioactive elements than rock. D) Ice is affected by tidal forces to a greater extent than rock. E) Ice is less dense than rock.