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) [...]
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
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:
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.
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.
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.
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.
Common names had long caused confusion. During the 18th century, Carlous Linnaeus (1707-1778). A Swedish botanist, devised a system for naming and classifying all the organisms known to him. His system is used today internationally. He discarded the common names of plants and gave each one a scientific name.