Question

(ii) (998) why this is 998​

Answer 1

Answer:

As per the question,

We have been provided that,

The density of water at 20 °C = 998 kg/m³

The density of water at 40 °C = 992 kg/m³

Therefore,

Change in density, δv = (998 - 992) = 6

And

Change in temperature, δT= (40 - 20) = 20°C

Now,

The coefficient of volume expansion of water is given by

\alpha_{v} = \frac{\delta v}{v} \times \frac{1}{\delta T}α

v

=

v

δv

×

δT

1

Put all the given values in this equation, we get

\alpha_{v} = \frac{6}{998} \times \frac{1}{20}α

v

=

998

6

×

20

1

\alpha_{v} =\frac{6}{998 \times 20}α

v

=

998×20

6