Advertisements
Advertisements
Question
Why the passengers are advised to remove the ink from their pens while going up in an aeroplane?
Advertisements
Solution
We know that atmospheric pressure decreases with height. Since ink inside the pen is filled at the atmospheric pressure existing on the surface of Earth, it tends to come out to equalise the pressure. This can spoil the clothes of the passengers, so they are advised to remove the ink from the pen.
APPEARS IN
RELATED QUESTIONS
Two wires are made of the same material and have the same volume. The area of cross-sections of the first and the second wires are A and 2A respectively. If the length of the first wire is increased by ∆l on applying a force F, how much force is needed to stretch the second wire by the same amount?
The Young’s modulus for a perfect rigid body is __________.
Which of the following is not a scalar?
If the temperature of the wire is increased, then Young’s modulus will __________.
Copper of fixed volume V is drawn into a wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is ∆l. If Y represents Young’s modulus, then which of the following graphs is a straight line?
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
Define strain.
State Hooke’s law of elasticity
Define Poisson’s ratio.
We use the straw to suck soft drinks, why?
