21) A temperature change of 20 C° corresponds to a Fahrenheit temperature change of 

21) ______

A) 11 F°. 

B) 36 F°. 

C) 68 F°. 

D) 18 F°. 

 

22) At what, if any, temperature are the numerical readings on the Fahrenheit and Celsius scales the same? 

22) ______

A) -60°  

B) -30°  

C) -40°  

D) -50°  

E) They can never read the same because they are based on different zeroes.

 

23) Oxygen condenses into a liquid at approximately 90 K.  What temperature, in degrees  Fahrenheit, does this correspond to?

23) ______

A) -297°F

B) -193°F

C) -265°F

D) -217°F

 

SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question.

24) What is absolute zero on the (a) Celsius scale and (b) on the Fahrenheit scale?

24) 

_____________

 

MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

25) Nitrogen boils at -196°C. What is the corresponding temperature in the Fahrenheit scale? 

25) ______

A) -315°F

B) -321°F

C) -196°F

D) -346°F

E) -290°F

 

26) The weather outside is frightful. The temperature is -22°F. What is the corresponding temperature in the Celsius scale?

26) ______

A) -30°C

B) -12°C

C) -22°C

D) -35°C

E) -20°C

 

27) Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?

27) ______

A) 2135 K

B) 3215 K

C) 2207 K

D) 2296 K

E) 2041 K

 

28) 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?

28) ______

A) 1.8 cm

B) 1.6 cm

C) 1.4 cm

D) 1.2 cm

E) 2.0 cm

 

29) A steel bridge is 1000 m long at -20°C in winter.  What is the change in length when the temperature rises to 40°C in summer?  The average coefficient of linear expansion of this steel is 11 × 10-6 K-1.

29) ______

A) 0.33 m 

B) 0.44 m 

C) 0.66 m 

D) 0.55 m 

 

30) An aluminum rod 17.400 cm long at 20°C is heated to 100°C.  What is its new length?  Aluminum has a linear expansion coefficient of 25 × 10-6 K-1. 

30) ______

A) 17.435 cm 

B) 0.348 cm 

C) 17.365 cm 

D) 0.0348 cm