Question

a thermometer has 20 equaldivision between 90 degree Celsius to 100 degree Celsius marks a student while determining the boiling point of water finds that the mercury threadbecomes stationary at 19th mark above 90 degree Celsius what is the least count of thermometr​

Answer 1

Explanation:

B) 99.5

Thermometer is the device that is used to measure the temperature of any substance. Here the level of mercury is checked as mercury is expanded at high temperature.

Since, there are 20 equal division between 90˚C and 100˚C marks hence each division stands for 0.5˚C.

The mercury level raised till 19th mark means it reached to 9.5˚C. Hence the recorded boiling point of water must be

90+9.5 = 99.5\quad Degree\quad Celsius90+9.5=99.5DegreeCelsius