difference between a base unit and a derived unit

Quantity Derivation of the Quantity SI Unit Symbol Area Length square m 2 Volume Length cube m 3 Density Mass per unit volume kg m -3 Speed Distance travelled per unit time m S -1 ..

The units of all physical quantities can be derived from the seven basic units. These units are called derived units because they can be derived from the basic units algebraically by multiplication and division. It is f..

Quantity Formula Symbol (SI Unit) Area A=LxB m 2 Volume V=LxBXH m 3 Density D = Mass/Volume kg m - 3 Velocity V = Distance/Time m s -1 Acceleration a = Change in Velocity/Time m -2 Momentum p = mass x velocity Kg ms -1 F..

Fundamental and Derived Units - The units of fundamental physical quantities are called fundamental units. They are length, mass and time. These units can neither be derived from one another nor can be resolved into any other units..

The units of fundamental physical quantities are called fundamental units. They are m, kg and sec. These units can neither be derived from one another nor can be resolved into other units. They are independent to each other. Units of phys..

The value of any physical quantity is always expressed as its numerical value as well as a unit. One often hears the weight expressed as grams or kilograms; the distance as foot, yard or mile; the volume as litres or gallons. The use of a number of units cause confusion and comp..

International System of Units - In 1960, the Eleventh General Conference of Weights and Measures recommended an International System of Units (abbreviated as SI) based on the metric system of measurement. When the recommendation was accepted in 1968, it marked the firs..

>The capacity of any differentiated cell with an active nucleus, to give rise to an entire organism, is called totipotency. Totipotency is well expressed in plant cells and is lost in several types of animal cells because of a high degree of specialization. Every living cell is involved in the flow..

Generally, volume is expressed in units of litres (L), millilitre (mL) or cubic centimetres (cm 3 ). The different units are related as 1 mL= 1 cm 3 1 L = 10 3 mL or 1 dm 3 The SI unit of volume is m 3 . As this unit is too large, volume is gene..

The molecular structure of cell membrane is still not clearly known. Several models have been proposed from time to time to explain its structure based on its physico-chemical propertie..