Question

1 Why is mercury commonly used as a thermometric fluid than water?
a) Density of mercury is more than the water.
b) Specific heat of mercury is more than water.
c) Mercury has greater visibility than water.
d) Specific heat of mercury is less than water.

Answer 1

because density of mercury is higher, so please answer ki question: The length of an arc of a circle is 12 cm. The corresponding sector area is 37.5 square cm. Find a) the radius of the circle. b) the angle subtended at the centre of the circle by the arc.

Answer 2

Answer:

Mercury is Commonly used as a thermometric fluid than water because Mercury has greater visibility than water.

Explanation:

• The Mercury neither wets nor sticks to the glass tube, therefore it gives accurate reading.

• The density of mercury is greater than that of any other liquid.

• Use of other liquids require much longer tube.

• The surface of mercury is shining and opaque.

• Therefore, it is easily seen while taking the reading.

• It can easily be obtained in a pure state.