2021 SPRING, G10 PHY, CHP 10, QUIZ
NAME ____________________
CLASS ____________________
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1. Multiple choice
1.1 The temperature in your classroom is closest to
A. 50 ℃
B. 68 ℃
C. 68 K
D. 295 K
C. -54 °F
D. 4.4 °F
1.2 Express -40°C in °F
A. -72 °F
B. -40 °F
1.3 The temperature changes from 35°F during the night to 75°F during the day. What is the temperature
change on the Celsius scale?
A. 72 ℃
B. 40 ℃
C. 32 ℃
D. 22 ℃
1.4 Oxygen condenses into a liquid at approximately 90 K. What temperature, in degrees Fahrenheit, does
this correspond to
A. -297 °F
B. -217 °F
C. -193 °F
D. -265 °F
1.5 How much heat is required to raise the temperature of a 225 g lead ball from 15.0 °C to 25.0°C? The
specific heat of lead is 128 J/kg • K.
A. 145 J
B. 576 J
C. 725 J
D. 288 J
1.6 A container of 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long will it
take to raise the temperature of the water from 15∘C to 25∘C. The specific heat capacity of the container
is negligible, and the specific heat capacity of water is 4.186 × 103 J/kg • C
A. 71 s
B. 4.1 s
C. 17 s
D. 320,000 s
1.7 Which two temperature changes are equivalent?
A. 1 ℃= 1 K
B. 1 K= 1 °F
C. 1 °F= 1 ℃
D. none of the above
1.8 The process in which heat flows by the mass movement of molecules from one place to another is known
as
A. conduction
B. radiation
C. convection
D. conversion
1.9 The coefficient of linear expansion of steel is 12 × 10-6 K-1. What is the change in length of a 25-m steel
bridge span when it undergoes a temperature change of 40 K from winter to summer?
A. 1.8 cm
B. 1.6 cm
C. 2.1 cm
D. 1.2 cm
1.10 The coefficient of linear expansion of copper is 17 × 10-6 K-1. A sheet of copper has a round hole with a
radius of 3.0 m cut out of it. If the sheet is heated and undergoes a change in temperature of 80 K, what is
the change in the radius of the hole?
A. It decreases by 4.1 mm.
C. It increases by 8.2 mm.
B. It increases by 4.1 mm.
D. It decreases by 8.2 mm.
2. Calculation
2.1 What temperature is the same on both the Celsius and Fahrenheit scales?
2.2 A lab student drops a 400.0-g piece of metal at 120.0°C into a cup containing 450.0 g of water at 15.0°C.
After waiting for a few minutes, the student measures that the final temperature of the system is 40.0°C. What
is the specific heat of the metal, assuming that no significant heat is exchanged with the surroundings or the
cup? The specific heat of water is 4186 J/kg • K.
2.3 How much heat must be removed from 456 g of water at 25.0°C to change it into ice at -10.0°C? The
specific heat of ice is 2090 J/kg • K, the latent heat of fusion of water is 33.5 × 104 J/kg, and the specific heat of
water is 4186 J/kg • K.
2.4 A 5.00-g lead bullet moving at 44.0 m/s penetrates a wood block and comes to rest inside the block. If half
of its kinetic energy is absorbed by the bullet, what is the change in the temperature of the bullet? The specific
heat of lead is 128 J/kg • K.
2.5 A brass pate has a circular hole whose diameter is 8.15 cm, while an aluminum ball has a diameter is 8.16
cm. If the ball and the plate are always kept at the same temperature,
(a) Should the temperature of the system be increase or decreases in order for the ball to fit through the hole?
(b) Calculate what the temperature change could give the same diameter for the ball and the hole?
(αCu= 17×10-6 K-1, αAl=24×10-6 K-1)