Physics Questions (Heat)

Scarbo

2009-08-14 5:13 am

1. A fault thermometer with unform scale reads 10℃ and 90℃ when it
is placed in melting ice and sterm over bolng water respectively.what
should be the true temperature if the thermometer reads 40℃?

The answer is 37.5℃.

How can I get the answer?

2. Clinical thermometers are designed for medical use. Other
thermometers(sometimes called '' ordinary' therometers) are made for
general laboratory use.
Describe two important differences between a clincal thermometer
and an 'ordinary' thermometer.

Thanks!!

回答 (1)

天同

2009-08-14 5:31 am

✔ 最佳答案

1. The difference between melting point ( 0'C) and boiling point (100'C) in the faulty thermometer = (90 - 10)'C = 80 'C
SInce a reading of 40'C on the faulty thermometer is (40-10)'C = 30'C above melting point, the true temperature
= (30/80) x 100'C = 37.5'C
2. (i) there is a restriction in a clinical thermometer that prevent the mercury thread to fall rapidly, but none on a laboratory thermometer.
(ii) the temperature range to be measured is much wider on a laboratory thermometer, but is only limited to a small range around normal body temperature in a clinical thermometer.

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