How much heat energy is required to vaporize a 4.40-g ice cube at 0°C? The heat of fusion of ice is 80.0 cal/g. The heat of vaporization of water is 540 cal/g, and cwater = 1.00 cal/g/°C
a. 2 730 cal
b. 3 170 cal
c. 2 820 cal
d. 3 520 cal
e. 2 380 cal
b
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If a ceramic has strong chemical bonding, the ceramic has a(n) ______________melting temperature.
Fill in the blank(s) with the appropriate word(s).
On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.2 feet tall on Earth. She lands on planet Z and is measured to be 88 foosi tall. Her partner Rachael is 92 foosi tall. How tall is Rachael on Earth?
a. 5.9 feet b. 5.4 feet c. 5.2 feet d. 5.1 feet e. 5.6 feet
Where was the Sun in Ptolemy's model of the universe?
A) at the center B) slightly offset from the center C) between Earth and the Moon's orbit D) between the orbits of Venus and Mars E) at the outer edge, beyond Saturn's orbit
Which of the following processes is due to
convection? a) The flowing of air from over cool water toward a warmer land area. b) The warming of the interior of a closed auto on a hot, sunny day. c) The frying of eggs in a hot pan. d) The direct warming of the Earth’s surface by the energy from the Sun.