Misconceptual question Flashcards
Rod A has twice the diameter of rod B, but both are made of iron and have the same initial length. Both rods are now subjected to the same change in temperature (but remain solid). How would the change in the rods’ lengths compare?
A. Rod A changes in length more than rod B.
B. Rod B changes in length more than rod A.
C. The same.
D. Need to know whether the rods were cooled or heated.
C
Rod A is twice as long as rod B, but both are made of iron and have the same diameter. Both rods are now subjected to the same increase in temperature (but remain a solid). How would the change in the rods’ lengths compare?
A. Rod A increases in length more than rod B.
B. Rod B increases in length more than rod A.
C. The same.
D. Not enough information.
A
The linear expansion of a rod depends on which of the following?
A. The length of the rod.
B. The change in temperature of the rod.
C. The type of material.
D. All of the above.
E. Both (b) and (c).
D
A steel plate has a hole in it with a diameter of exactly 1.0 cm when the plate is at a temperature of 20°C. A steel ring has an inner diameter of exactly 1.0 cm at 20°C. Both the plate and the ring are heated to 100°C. Which statement is true?
A. The hole in the plate gets smaller, and the opening in the ring gets larger.
B. The opening in the ring gets larger, but we need the relative size of the plate and the hole to know what happens to the hole.
C. The hole in the plate and the opening in the ring get larger.
D. The hole in the plate and the opening in the ring get smaller.
E. The hole in the plate gets larger, and the opening in the ring gets smaller.
C
A steel tape measure is marked such that it gives accurate length measurements at room temperature. If the tape measure is used outside on a very hot day, how will its length measurements be affected?
A. Measured lengths will still be accurate.
B. Measured lengths will be smaller than the real lengths.
C. Measured lengths will be larger than the real lengths.
B
One mole of an ideal gas in a sealed rigid container is initially at a temperature of 100°C. The temperature is then increased to 200°C. The pressure in the gas
A. remains constant.
B. increases by about 25%.
C. doubles.
D. triples.
E. is halved.
B
When an ideal gas is warmed from 20°C to 40°C, the gas’s temperature T that appears in the ideal gas law increases by a factor
A. of 2.
B. of 1.07.
C. that depends on the temperature scale you use.
B
When using the ideal gas law, which of the following rules must be obeyed?
A. Always use temperature in kelvins and absolute pressure.
B. Always use volume in and temperature in kelvins.
C. Always use gauge pressure and temperature in degrees Celsius.
D. Always use gauge pressure and temperature in kelvins.
E. Always use volume in and gauge pressure.
A
The temperature of an ideal gas increases. Which of the following is true?
A. The pressure must decrease.
B. The pressure must increase.
C. The pressure must increase while the volume decreases.
D. The volume must increase while the pressure decreases.
E. The pressure, the volume, or both, may increase.
E
When you blow up a balloon, which of the following increases significantly?
A. The temperature inside the balloon.
B. The pressure inside the balloon.
C. The number of air molecules inside the balloon.
D. The volume of the balloon.
C, D
You carry an airtight bag of potato chips onto an airplane. After the plane has ascended to cruising altitude, you notice that the unopened bag has puffed up. The most plausible explanation is that the volume of a gas (such as air) increases when
A. temperature increases, if pressure is approximately constant.
B. pressure decreases, if temperature is approximately constant.
C. pressure increases, if temperature is approximately constant.
D. temperature decreases, if pressure is approximately constant.
B
Two identical car tires are at the same temperature but contain different amounts of air. A pressure gauge indicates 1.0 atm for tire A and 2.0 atm for tire B. If the volume of the two tires is the same, how are the amounts of air in the two tires related?
A. A contains twice as much air as B.
B. B contains twice as much air as A.
C. B contains more air than A, but not twice as much.
D. B contains more than twice as much air as A.
E. A contains more than B, but not twice as much.
C
