Question

26. (i) A test-tube containing little water is corked and suspended
from 2 strings in a slanting position. Observe the test tube when
it is heated and answer the following questions:-
(a) What happens to the cork?
(b) In which direction does the test-tube move?​

Answer 1

The cork blows out and the test tube recoiled  in opposite direction.

Explanation:

Newton's third law will be applicable to this experiment.

Newton's third law defines that action and reaction are always being equal and opposite to each other.

(a) On boiling the water, steam start producing that exerts an action force on the cork and as a result,  the cork blows out.

(b) The test tube  recoiled  in opposite direction because of the opposite reacting  force exerted by the cork.

Answer 2

Answer:

test tube moves in the opposite direction