Advertisements
Advertisements
प्रश्न
Why the passengers are advised to remove the ink from their pens while going up in an aeroplane?
Advertisements
उत्तर
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
संबंधित प्रश्न
If a wire is stretched to double of its original length, then the strain in the wire is __________.
For a given material, the rigidity modulus is `(1/3)^"rd"` of Young’s modulus. Its Poisson’s ratio is
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?
Which of the following is not a scalar?
If the temperature of the wire is increased, then Young’s modulus will __________.
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 Poisson’s ratio.
A spring balance shows wrong readings after using it for a long time. Why?
Write down the expression for the elastic potential energy of a stretched wire.
Derive an expression for the elastic energy stored per unit volume of a wire.
