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356

A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm-3. the volume of the iron is?

  • A. 5.0 x 10-3 m-3
  • B. 4.5 x 10-3 m-3
  • C. 2.5 x 10-3 m-3
  • D. 2.0 x 10-3 m-3
View Answer & Discuss (38) JAMB 2007
357

A clinical thermometer is different from other mercury in glass thermometers owing to

  • A. the constriction on its stem
  • B. the grade of mercury used in it
  • C. its long stem
  • D. its wide range of temperatures
View Answer & Discuss (8) JAMB 2007
358
I. Use a liquid with a high melting point.
II. use a liquid of high volume expansivity.
III. use a capillary tube of large diameter.

which of the above best describes how the sensitivity of a liquid-in-glass thermometer can be enhanced?
  • A. I only
  • B. II. only
  • C. I and II only
  • D. II and III only
View Answer & Discuss (1) JAMB 2007
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359
2 kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes. what is the increase in temperature of the water?


[specific heat capacity of water = 4200 jkg -1k-1]
  • A. 30°
  • B. 25°
  • C. 15°
  • D. 10°
View Answer & Discuss JAMB 2007
360
I. Increase the melting point of the liquid.
II. Increase the boiling point of the liquid.
III. Decrease the melting point of the liquid.
IV. Decrease the boiling point of the liquid.
which of the statement above about the effect on increase in pressure in a liquid are correct?
  • A. I and II only
  • B. I and III only
  • C. II and III only
  • D. III and IV only
View Answer & Discuss (1) JAMB 2007
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