Speed of the light and sound — task. Science TNSB Mentoring, Class 10.

Read the assertion and reason carefully, and select the right answer:

1. Assertion (A) : Two persons on the space cannot talk to each other.
Reason (R) : There is no medium in the space.

A is false but R is true
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false

2. Assertion (A) : The change in air pressure affects the speed of sound.
Reason (R) : The speed of sound in a gas is inversely proportional to the square of the pressure.

Both A and R are true and R is the correct explanation of A
A is true but R is false
A is false but R is true
Both A and R are false

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7. Speed of the light and sound

Question: