Physics

Question 1

1Convert 98.6 °F to Celsius.

Hard

A. 32 °C B. 35 °C C. 37 °C D. 40 °C

Question 2

2A clinical thermometer has a constriction to

Easy

A. protect the bulb B. make it faster C. increase its range D. stop the mercury falling back before reading

Question 3

3A thermocouple is suitable for measuring

Hard

A. room temperature only B. body temperature only C. rapidly changing and very high temperatures D. freezing water only

Question 4

4Alcohol, rather than mercury, is used in thermometers for very cold places because alcohol

Easy

A. is silver-coloured B. conducts electricity C. has a very low freezing point D. has a high boiling point

Question 5

5A thermometer that uses the voltage produced at the junction of two different metals is a

Easy

A. clinical thermometer B. gas thermometer C. six's thermometer D. thermocouple

Question 6

6Absolute zero is

Easy

A. 0 K (−273 °C) B. −100 °C C. 273 K D. 0 °C

Question 7

7A resistance thermometer reads 10 Ω at 0 °C and 14 Ω at 100 °C. At 12.5 Ω the temperature is

Hard

A. 62.5 °C B. 25 °C C. 75 °C D. 50 °C

Question 8

8The narrow constriction in a clinical thermometer

Easy

A. speeds up heating B. makes the thermometer heavier C. measures pressure D. stops the mercury falling back before it is read

Question 9

9Convert 27 °C to kelvin.

Easy

A. 273 K B. 327 K C. 300 K D. 246 K

Question 10

10Mercury is used in thermometers partly because it

Easy

A. is a poor conductor of heat B. is transparent C. freezes at 0 °C D. expands uniformly and does not wet glass