Question
Explain fluid pressure.

Answer

SELF

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The escape speed of a projectile on the earth’s surface is 11.2km s-1. A body is projected out with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun and other planets.
Explain with the suitable example that a reversible process must be carried slowly and a fast process is necessarily irreversible.
A conducting wire of length l, lying normal to a magnetic field B, moves with a velocity v, as shown in the figure.
  1. Find the average magnetic force on a free electron of the wire.
  2. Due to this magnetic force, electrons concentrate at one end, resulting in an electric field inside the wire. The redistribution stops when the electric force on the free electrons balances the magnetic force. Find the electric field developed inside the wire when the redistribution stops.
  3. What potential difference is developed between the ends of the wire?

A cubical metal block of edge 12cm floats in mercury with one fifth of the height inside the mercury. Water is poured till the surface of the block is just immersed in it. Find the height of the water column to be poured. Specific gravity of mercury = 13.6.
Prove the result that the velocity v of translation of a rolling body (like a ring, disc, cylinder or sphere) at the bottom of an inclined plane of a height h is given by $\text{v}^2=\frac{2\text{gh}}{\Big(\frac{1+\text{k}^2}{\text{R}^2}\Big)}$ using dynamical consideration (i.e. by consideration of forces and torques).
Note: k is the radius of gyration of the body about its symmetry axis, and R is the radius of the body. The body starts from rest at the top of the plane.
A rocket accelerates straight up by ejecting gas downwards. In a small time interval $\Delta\text{t},$ it ejects a gas of mass $\Delta\text{m}$ at a relative speed u. Calculate KE of the entire system at $\text{t}+\Delta\text{t}$ and t and show that the device that gas does work $=\Big(\frac{1}{2}\Big)\Delta\text{mu}^2$ in this time interval (neglect gravity).
Consider the situation shown in figure. The wire PQ has mass m, resistance r and can slide on the smooth, horizontal parallel rails separated by a distance l. The resistance of the rails is negligible. A uniform magnetic field B exists in the rectangular region and a resistance R connects the rails outside the field region. At t = 0, the wire PQ is pushed towards right with a speed v0. Find

  1. The current in the loop at an instant when the speed of the wire PQ is v.
  2. The acceleration of the wire at this instant.
  3. The velocity vas a functions of x.
  4. The maximum distance the wire will move.

In deriving Bernoulli’s equation, we equated the work done on the fluid in the tube to its change in the potential and kinetic energy.
  1. What is the largest average velocity of blood flow in an artery of diameter 2 × 10–3m if the flow must remain laminar?
  2. Do the dissipative forces become more important as the fluid velocity increases? Discuss qualitatively.
A parallel-plate capacitor having plate area 400cm2 and separation between the plates 1.0mm is connected to a power supply of 100V. A dielectric slab of thickness 1.0mm and dielectric constant 5.0 is inserted into the gap:
  1. Find the increase in electrostatic energy.
  2. If the power supply is now disconnected and the dielectric slab is taken out, find the further increase in energy.
  3. Why does the energy increase in inserting the slab as well as in taking it out?
A block of mass m moving at speed 'v' collides with another block of mass 2 m at rest. The lighter block comes to rest after the collision. Find the coefficient of restitution.