Q1.
Compare whether your observations match with your predictions. Did your right hand feel that the water in container B is cool, while your left hand felt that the same water is warm? What do you infer from these observations?
Answer
Yes — the observations match the predictions. The right hand felt B cool and the left hand felt the same water warm.
The inference:
The same water gave two different answers at the same moment.
Therefore the feeling of hotness depends on the hand, not only on the water.
We cannot always rely upon our sense of touch to decide whether a body is hot or cold.
Therefore the feeling of hotness depends on the hand, not only on the water.
We cannot always rely upon our sense of touch to decide whether a body is hot or cold.
Why this matters in science: a measurement must give the same result no matter who takes it. Touch fails this test, so science needs an instrument and a number — a thermometer and a temperature in °C.