Physics Practice Questions - Chapter 15
from your finger to the ice
1) When you touch a cold piece of ice with your finger, energy flows A) from your finger to the ice. B) from the ice to your finger. C) actually, both ways.
surface of bodies of water
12) Ice tends to form first at the A) surface of bodies of water. B) bottom of bodies of water. C) surface or bottom depending on the water depth.
larger
13) When an iron ring is heated, the hole becomes A) smaller. B) larger. C) neither smaller nor larger. D) either smaller or larger, depending on the ring thickness.
decreases
14) As a piece of metal with a hole in it cools, the diameter of the hole A) increases. B) decreases. C) remains the same.
copper expands more than iron
16) When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is A) iron gets hotter before copper. B) copper gets hotter before iron. C) copper expands more than iron. D) iron expands more than copper. E) none of these
decreases
17) If glass expanded more than mercury, then the column of mercury in a mercury thermometer would rise when the temperature A) increases. B) decreases. C) neither of these
decreases
24) Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water A) increases. B) decreases. C) remains the same.
water expands when freezing
26) During a very cold winter, water pipes sometimes burst. The reason for this is A) the ground contracts when colder, pulling pipes apart. B) water expands when freezing. C) water contracts when freezing. D) the thawing process releases pressure on the pipes. E) none of these
iron
3) Which of the following normally warms up fastest when heat is applied? A) water B) iron C) glass D) wood E) All of the above choices are equally true.
300 K
30) Room temperature on the Kelvin scale is about A) 100 K. B) 200 K. C) 300 K. D) 400 K. E) more than 400 K.
high specific heats
33) Some molecules are able to absorb large amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules have A) low specific heats. B) high specific heats. C) none of the above
less than 30 degrees C
39) Place a kilogram block of iron at 40 degrees C into a kilogram of water at 20 degrees C and the final temperature of the two becomes A) less than 30 degrees C. B) at or about 30 degrees C. C) more than 30 degrees C.
becomes wider
42) Consider a metal ring with a gap cut in it. When the ring is heated, the gap A) becomes narrower. B) becomes wider. C) retains its size.
high specific heat
7) The moderate temperatures of islands throughout the world has much to do with water's A) poor conductivity. B) vast supply of internal energy. C) high specific heat. D) high evaporation rate. E) absorption of solar energy.
