Question

3. Porous canvas bags filled with water are used by
travelers in hot weather. When the bags are slung
on the outside of a fast-moving car, the water inside
is cooled considerably. Explain.​

Answer 1

Answer:

dgbvxtjnSaadvbkkhiffj

Answer 2

Because Faster the evaporation is done, faster the water cools down.

Explanation:

Water from inside a porous canvas bag evaporates i.e If porous bag hang outside of a fast moving car it evaporates faster. On the basis of evaporation process i.e Evaporation is a process which take away heat from the liquid water. Faster the evaporation is done, faster the water cools down.

OR

When porous canvas bags filled with water are slung on the outside of a fast-moving car, the  fast-moving water molecules break free from the canvas bag, and the temperature of the bag  decreases. In turn, the cool wet canvas cools the water inside.