The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths…

JAMB 1981

The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is

A. 32°C

B. 48°C

C. 56°C

D. 65°C

E. 75°C

Correct Answer: Option C

Explanation

From the question, we can derive that steam point(100°) = 19cm, ice point(0°) = 3cm. Now the question is 12cm represents what temperature. I’ll call that temperature C, for crane.Therefore:

100°—19cm

C°—12cm

0°—3cm

C-0°/100-C = 12-3/19-12

C/100-C = 9/7

Cross multiply

7C = 9(100-C)

16C = 900

C = 56.25

C = 56°C

Explain your answer in the comment box below and let’s have a discussion so as to have a great understanding of this question!

PREVIOUS           NEXT

GO BACK TO THE PAST QUESTIONS PAGE

If you find this post beneficial, feel free to use the share button to share with friends.

Follow us on our Facebook page and subscribe to this website for more updates by hitting on the bell icon by the bottom left corner of your screen!

Leave a Comment

Your email address will not be published.