# Education

## System Software and Basic Units

October 28, 2011

1.3 System Software Vs Application Software Generally speaking, a computer is a “deaf and dumb” machine, which cannot do anything at its own unless it is told to do so. We instruct it to do some number calculation, to create/modify a document, to work on some engineering application and so on. So this instruction (s) [...]

## Assessment Of Total Uncertainty In The Final Result Part 2

October 27, 2011

The uncertainty in the time period of a vibrating body is found by dividing the least count of timing device by the number of vibrations. For example, the time of 30 vibrations of a simple pendulum recorded by a stopwatch accurate upto one tenth of a second is 54.6 s, the period

## Assessment Of Total Uncertainty In The Final Result Part 1

October 26, 2011

Percentage uncertainties are added. For example the maximum possible uncertainty in the value of resistance R of a conductor determined from the measurements of potential difference V and resulting current flow I by using R = V/ I is found as follows:

## Viruses (F.Sc-Biology-Chapter 5) Part 1

October 26, 2011

The word virus is derived from Latin word venome meaning poisonous fluid. It can be defined as non cellular infectious entities which contain either RNA or DNA, normally encased in proteinaceous coat, and reproduce only in living cells. Viruses utilize the biosynthetic machinery of the host for its own synthesis and then transfer themselves efficiently to other Cell.

## Computer Output Devices Part 2

October 25, 2011

Impact Printers: An impact printer forms characters or images by striking a mechanism such as a print hammer or wheel against an inked ribbon, leaving an image on the paper. Following are a few types of impact printers:

## Precision And Accuracy (F.Sc-Physics-Chapter 1.6)

October 24, 2011

For example, When the length of an object is recorded as 25.5 cm by using a metre rod having smallest division in millimeter, it is the difference of two readings of the initial and final positions. The uncertainty in the single reading as discussed before is taken as ± 0.05 cm which is now doubled and is called absolute uncertainty equal to ± 0.1 cm.

## Two To Five Kingdom Classification Systems (F.Sc-Biology)

October 23, 2011

In 1937, E-Chatton suggested differentiating terms procariotique (from greek pro, meaning before, and karyon, meaning nucleus) used to describe bacteria and blue-green algae, and the term eu-cariotique (from greek eu, mean true) to describe animal and plant cells.

## Computer Output Devices Part 1

October 23, 2011

Display screens: also known as CRTs, monitors, or simply screens, differ in size, color, resolution, and video display adapter card. These are used for inputting the data or displaying the information after processing.

## Significant Figures Part 2 (F.Sc-Physics-Chapter-1)

October 22, 2011

the answer should be written to three significant figures only. The other figures are insignificant and should be deleted. While deleting the figures, the last significant figure to be retained is rounded off for which the following rules are followed.