If a certain mass of mercury has a volume of 0.002 m3 at a temperature of 20°c, what will be the volume at 50°c?

a. 0.002010812m3

b. 0.004021624m3

c. 0.002021624m3

d. 0.10812m3

Answer : The correct option is, (A)

Solution : Given,

Volume of mercury at is

As mercury is a liquid. So, we have to apply the volume of expansion of liquid.

Formula used for the volume expansion of liquid,

or,

where,

= volume of liquid at temperature

= volume of liquid at temperature

= volume of liquid at temperature

= volume expansion coefficient of mercury at is 0.00018 per centigrade

Now put all the given values in the above formula, we get

Therefore, the volume of mercury at is,

d) physical means can be used to separate the components of air.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min