Question
What principle/law explains the working of the hydraulic
brakes in automobiles?Solution
Hydraulic brakes work on the principle of Pascal's law which states that "pressure at a point in a fluid is equal in all directions in space". According to this law when pressure is applied on a fluid it travels equally in all directions so that uniform braking action is applied on all four wheels. The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing ethylene glycol, to transfer pressure from the controlling unit, which is usually near the operator of the vehicle, to the actual brake mechanism, which is usually at or near the wheel of the vehicle.
The energy of a photon is proportional to:
Who discovered the cell for the first time?
Which planet is known as the Red Planet?
Which of the following is the first organic compound that was synthesised in the laboratory?
The centre of gravity of a sprinter during the race lies –
Intensity of gravitational field of earth is maximum at –
What is the focal length of a double convex lens for which the radius of curvature of each surface is 30 cm and the refractive index of glass is 2.50 ?
For a system of particles, the center of mass moves:
What is the most basic criteria used to decide whether something is alive?
Which of the following pair of microorganisms is correct?
I. Spirogyra – Algae
II. Amoeba – Fungi
