cgs unit and si unit and scalar vector

Multiplication of Vectors by Real Numbers, i.e., Scalar Multiple of a Vector - The multiplication of a vector by a real number assumes a lot of significance in such statements as - velocity of car B is double the velocity of car A l . When a vector ..

is the same as that of . If l is negative, then the direction of l is opposite to that of . If is multiplied by zero, we get a vector whose magnitude is zero and whose direction is arbitrary. This vector is called a zero vector or null vector. If l is a pure ..

The SI unit of velocity is m/s and time is s..

SI unit of heat is the joule (J) CGS unit of heat is erg and 1 joule = 10 7 erg The most commonly used unit of heat is the calorie. One calorie of heat is the quantity of heat required to raise the temperature of 1 g of water through 1 0 ..

; derivations involving these laws are often greatly simplified if this is done. Quantities that can be completely specified by a number and unit and therefore, have magnitude only, are called scalars. Some scalar quantities are mass, length, time, density, energy and ..

Another unit of force by which the magnitude of force can be understood and gauged, is the gravitational unit of force. A gravitational unit of force is that force with which the Earth attracts a body of unit mass towards its centre. A gravitational unit..

Heat being a form of energy can be measured. What is the unit of heat energy? In CGS system, heat is measured in calories. Calorie is defined as 'the heat energy required to increase the temperature of 1gm of water through one degree Celsius'. In SI system, heat energy..

Newton's second law of motion gives a quantitative definition of force. Impulse Mathematical representation of Newton's second law of motion is or When the time of application of force is short then Ft is defined as impulse. Impulse is a large force acting for a short duration. SI ..

A solid weighs 50 gf in air and 44 gf when completely immersed in water. Calculate (i) R.D of the solid (ii) upthrust (iii) density of the solid in cgs and SI units..

Mass Weight 1 . It is the amount of matter contained in an object 2 . The mass of a body is constant throughout the universe 3 . Mass can never be equal to zero 4 . Mass is a scalar quantity 5 . SI unit of mass is kg 1 . It is the force with which ..