Question

Why should you not hold theometer by Its bulb in science class7 baise

Answer 1

HEY MATE

UR ANSWER IS

It is advised not to hold the thermometer by its bulb while reading the temperature because the level of Mercury increases due to our body temperature and effect the actual reading. Always hold a thermometer from its top end and read the level of Mercury.A clinical thermometer is used for measuring the body temperature of human being. Clinical thermometer is also known as doctor's thermometer. Most of the clinical thermometer show two scales the Celsius and Fahrenheit scale. Celsius thermometer temperature ranges from 35° C to 42° C. In a Fahrenheit thermometer temperature ranges from 94° F to 108° F.

HOPE THIS HELP U KEEP SMILING

Answer 2

We know that bulb of a thermometer contains the Mercury fluid.

This Mercury fluid expands on heating and contract on cooling. Hence, directly touching the bulb of thermometer will allow it to take heat and expands before its actual use.

This will not give correct reading.