My dear school students... we help you to get understanding about derivations in physics and chemistry..

NUMBER SYSTEMS IN COMPUTER

There are four types of number systems

1. Binary Number System

2. Octal Number System

3. Decimal Number System

4. Hexa decimal Number System 

Binary Number System: 

      * Includes only two numbers- 0,1.

      * Base of binary number system is 2.

Octal Number System:

      *Includes 8 numbers from 0 to 7.

      *Base of octal number system is 8.

Decimal Number System:

      *Includes 10 numbers from 0 to 9.

      *Base of Decimal Number system is 10.

Hexadecimal Number System:

       *Includes 16 numbers from 0 to 15.

       *Base of Hexadecimal number system is 16. 

       *In hexadecimal number system first 10 numbers include 0 to 9 and then 10 to 15 is replaced by 'A' to 'F'. (0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F)

 Why the programs and data cannot be stored in the main memory permanently?

This arrangement is not possible for following two reasons:

1. Main Memory is usually too small to store all needed programs and data  permanently.

2. Main memory is volatile storage device that loses its contents when power is turned off or otherwise lost.

Thus, most computer systems provide secondary storage as an extension of main memory. The main requirement of secondary storage is that it be able to hold large quantities of data permanently. 

RAM Vs DRAM

Computer programs must be in main memory to be executed. this main memory is also called Random Access Memory or RAM. Main memory is the only large storage area that the processor can access directly. It is implemented in a semi conductor technology called Dynamic Random Access Memory (DRAM), which forms an array of memory words. Each word has its own address. 

kirchoff's voltage law

kirchoff's law of voltage

My dear school students... we help you to get understanding about derivations in physics and chemistry..

Mass of Earth :

From the expression  g=GM/R^2
         M=(gR^2)/G
         M=( 9.8 x (6.38 x 10^6)^2 ) / 6.67 x 10^-11
         M=5.98 x 10 ^24 kg

My dear school students... we help you to get understanding about derivations in physics and chemistry..


1. Difference between mass and weight

Mass: 

1. Mass is a fundamental quantity.

2. It is the amount of matter contained in a body.

3.Its unit is Kilogram.

4. Remains the same.

5. It is measured using physical balance.

Weight:

1.Weight is a derived quantity.

2. It is the gravitational pull acting on the body.

3. It is measured in Newton.

4. Varies from place to place.

5. It is measured using spring balance.

OHM’S LAW

                Ohm’s law states that, “at constant temperature current flowing through the circuit is directionally proportional to voltage and inversely propotional to the resistance”.

                   Current- I, Voltage-V, Resistance-R

                     

                              I =V/R

                             R=V/I

                            V=I/R

DERIVATION FOR SECOND LAW OF MOTION

The velocity of the body is given by the first derivation of the displacement with respect to time

v = ds/dt

Let,

          ‘a’ is acceleration

          ‘u’ is initial velocity

          ‘v’ is final velocity

          ‘t’ is time

The velocity of the body is given by the first derivative of the displacement with respect to time.
                            Velocity = displacement /time

 

CLICK HERE TO SEE THE DETAILED DERIVATION FOR SECOND LAW OF MOTION 

 

DERIVATION FOR FIRST EQUATION OF MOTION

As acceleration of any body  at any instant is given by first derivative of velocity with respect to time,
a=dv/dt, is used to derive the first equation of motion. 

Here derivation is done using the integral calculus method. 

CLICK HERE TO SEE THE DETAILED DERIVATION 

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MATHAN FASHIONS: HOW TO STITCH A NORMAL CHUDITHAR BOTTOMHi friends....: HOW TO STITCH A NORMAL CHUDITHAR BOTTOM Hi friends... Are you feeling confused on seeing the patterns for how to stitch a normal chu...