Question

One Autumn morning the temperature went up from -4°C to 5°C.

(a) By how many degrees did the temperature rise ? During the afternoon the temperature then fell by seven degrees from 5°C.

(b) What was the temperature at the end of the afternoon ?

Answer 1

Step-by-step explanation:

(a) Number of degrees by which the temperature rose = [5-(-4)]°C = 9°C.

(b) Temperature at the end of the afternoon = 5°C -7°C = -2°C.

Answer 2

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Dry apricots first swell due to endosmosis and then shrink due to exosmosis

Dry apricots have more solutes than pure water. Hence, the endosmosis, i.e., water molecules will move from outside to the inside of the apricot through the wall of apricot. Due to this, apricots will swell eventually. When such apricots are transferred to the sugar solution, then the solution will be the hypertonic bearing high amount of solute. Hence, exosmosis, i.e., water will move from inside to the outside of apricot through the apricot wall. Due to this, apricot will shrink.

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