e learning definitions

The velocity of a moving particle is the rate of its displacement or the rate of change of its displacement with time. Therefore, velocity possesses both magnitude and direction and hence, is a vector. A particle is said to be moving with uniform velocity when it is moving along a straight line ..

The figure is a unit circle, with origin O as centre cuts the x-axis at A (1,0) and let a variable point moving on the circumference move through an arc length q . i.e., AP = p( q ). The coordinates at the position of p( q ) are p(x,y) = (cos q , sin q ). Then the tangent function i..

Hence we find that the magnetic flux depends on (i) the strength of the magnetic field. (ii) the area of the surface. (iii) the angle between the magnetic field vector and the area vector. Increasing the magnetic flux through a surface can be done in 3 ways. (ii) Flux increases if the magnetic fiel..

It is a condition where some sort of a barrier is formed between the stigma and the stamens of the same flower. The barrier may be in the form of a hood covering the stigma or anthers, and stigma may lie at some distance from the anther or the stigma might become sticky and receptive only on the l..

This vitamin is named as tocopherol. Nearly about 8 tocopherols are identified - a , b , g etc. Among these -tocopherol is most active. Vitamin E is stored in adipose tissue, liver and muscle. It acts as a scavenger and is essential for membrane structure, cellular respiration and st..

It is called tocopherol and is fat soluble. Its function in humans is unknown. However, in rats it affects muscles and the reproductive system and prevents breakdown of red blood cells. Deficiency can cause anaemia. The sources are cereal germ oils (wheat germ oil, corn germ oil), liver, green lea..

Emmigration is the permanent movement/departure of individuals of same species out of the local population due to several reasons such as lack of food, scarcity of space (over crowding), etc. Emmigration decreases the size of local population, but the species spread to new areas. If more individua..

Ethene undergoes addition polymerisation with itself at 200 o C and 2000 atmospheres of pressure to form polythene..

Certain hygroscopic substances, not only absorb moisture from the air, but they themselves dissolve in that moisture, undergoing a change of state. Such substances are called deliquescent substances. The process is called deliquescence. some Deliquescent substances Anhydrous calcium c..

The corolla is gamopetalous and bell shaped, e.g., Pumpkin, Spathodea campanulet..