Selina solutions

Selina solutions

Grade 7

Physical Quantities and Measurement | Short/Long Answer Questions

Question 13

Q13) How does the density of water changes when :

(a) it is heated from 0°C to 4°C.

(b) it is heated from 4°C to 10°C ?

Solution:

(a) water contracts on heating from 0°C to 4°C and expands on heating above 4°C.

(b) The density of water is maximum at 4°C. It decreases when it is cooled from 4°C to 0°C or it is heated above 4°C.

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Question 13

Q13) How does the density of water changes when :

(a) it is heated from 0°C to 4°C.

(b) it is heated from 4°C to 10°C ?

Solution:

(a) water contracts on heating from 0°C to 4°C and expands on heating above 4°C.

(b) The density of water is maximum at 4°C. It decreases when it is cooled from 4°C to 0°C or it is heated above 4°C.

Still have questions? Our expert teachers can help you out

Book a free class now

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subject-cta
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