definition for work

Introduction - For a layman the term 'work' implies any activity resulting in muscular or mental exertion. In physics, however, the term has a different meaning. It represents a physical quantity. When a force acts on an object, if the object moves in the direction of force, we say that t..

Suppose we have to evaluate the integral (1) Let t = g(x) is the suitable substitution. Differentiating, we get dt = g'(x) dx (2) Now the new variable is t. The upper limit b and the lower limit a are in terms of x. Change these limits to the new variable g(b) and g(a). (3) Write and express in ter..

Power is denoted by the letter 'P'. As energy is the capacity to do work, power can also be defined as energy consumed in unit time. SI unit of power SI unit of work is joule and time is second. Therefore, SI unit of power is joule/sec. 1 joule/sec = 1 w..

During high tide, when the level of water in the sea is high, sea-water flows into the reservoir of the barrage and turns the turbines. The turbines then turn the generator shaft to produce electricity. During low tide, the sea-water stored in the barrage reservoir is allowed to flow out into..

The various forms of biomass are mixed with an equal quantity of water in the mixing tank. This forms the slurry. The slurry is fed into the digester through the inlet chamber. When the digester is partially filled with the slurry, the introduction of slurry is stopped and the plant is left..

When the circuit is completed, a deflection is observed in the (G) towards the zinc electrode indicating that the e - are flowing from the Zn electrode to Cu electrode. Al the Zn electrode, oxidation takes place. The 'e' removed or lost or retained by the metal move through the material of the ..

Ammonium chloride, splits into ammonium and chloride ions. The chloride ions (Cl - ) migrate to the zinc rod and deposit their negative charge at the zinc rod. Hence zinc becomes negatively charged and the reactions takes place in which zinc is converted to zinc chloride. The ammonium ions migrate..

The plane of the coil is horizontal and the split ring S 1 touches the brush B 1 while the split ring S 2 touches the brush B 2 . The brush B 1 is connected to the anode of the d.c. battery while the brush B 2 is connected to the cathode. The current flows in the coil in the direction ABCD. The arm..

Slurry (mixture of equal quantities of biomass and water) is prepared in the mixing tank. The prepared slurry is fed into the inlet chamber of the digester through the inlet pipe. The plant is left unused for about two months and introduction of more slurry is stopped. During this period..