Let's play with science.

07/05/2018

13/06/2015

4th sem vtu B.E xams are about to start

11/11/2014

Enthalpy is a measure of the total energyof a thermodynamic system. It includes theinternal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.

Enthalpy is a thermodynamic potential. It is a state function and an extensivequantity. The unit of measurement in theInternational System of Units (SI) for enthalpy is the joule, but other historical, conventional units are still in use, such as the small and the large calorie.

The enthalpy is the preferred expression of system energy changes in many chemical, biological, and physical measurements, because it simplifies certain descriptions of energy transfer , as it is not affected by energy transferred to the environment through the expansion of the system under study. The total enthalpy, H, of a system cannot be measured directly. Thus, change in enthalpy, ΔH, is a more useful quantity than its absolute value. The change ΔH is positive in endothermic reactions, and negative in exothermic processes. ΔH of a system is equal to the sum of non-mechanical work done on it and the heat supplied to it.

For quasistatic processes under constant pressure, ΔH is equal to the change in the internal energy of the system, plus the work that the system has done on its surroundings.[1] This means that the change in enthalpy under such conditions is the heat absorbed (or released) by a chemical reaction.

10/11/2014

I don't have a idea bcz...i use airtel..
.one touch internet

27/10/2014

A dramatic Virginia sunrise frames the
launchpad where a JPL-built instrument sits,
poised for launch on the Orbital Sciences
Corporation Antares rocket this afternoon. The
launchpad is at NASA's Wallops Flight Facility in
Virginia. The photo was taken on Sunday, Oct.
26. The rocket is delivering the tiny satellite -
called the Radiometer Atmospheric Cubesat
Experiment (RACE, for short) - as part of its load
of supplies for the International Space Station.
Launch is scheduled for 3:45 p.m. PDT (6:45
p.m. EDT).
RACE will test new technology to measure water
v***r, a measurement important for climate
and weather studies. CubeSats are small,
lightweight and low-cost satellites.

26/10/2014

Dr. APJ Abdul Kalam our Missile Man is hospitalized from last two weeks but no media is interested, but we r true lovers of him let's pray for his speedy recovery,and share this message to everyone to prove that any media is not necessary to remember our Heroes.

Forwarding for prayers

26/10/2014

WHAT IS PMM-1 A PMM1 is a
Thermodynamic system that undergoes a
cyclic process that produce no external
affects other than the rise ( or fall) of a
weight in a gravity field.
WHY IS IT IMPOSSIBLE?
PMM-1 state that work can still be produce
in a cyclic process. This definition is against
first law of thermodynamics and
conservation of energy.
According to first law of thermodynamics, in
cyclic process
E2- E1 = mg (h2 - h1) h2= h1 in cyclic
process
so the above equation yields E2=E1.
where as according to PMM-1 you can
produce work even when energy is zero (0),
which makes it impossible

25/10/2014

The Mars Orbiter Mission (MOM), also called
Mangalyaan ("Mars-craft" from Sanskrit मंगल
mangala , "Mars" and यान yāna , "craft,
vehicle"), [9][10] is a spacecraft orbiting Mars
since 24 September 2014. It was launched on
5 November 2013 by the Indian Space
Research Organisation (ISRO) under the
guidance of the Project Director Mylswamy
Annadurai . [11][12][13][14]
The mission is a "technology demonstrator "
project to develop the technologies for
design, planning, management, and
operations of an interplanetary mission. [15]
It carries five instruments that will help
advance knowledge about Mars to achieve its
secondary, scientific, objective. [16]
The Mars Orbiter Mission probe lifted-off
from the First Launch Pad at Satish Dhawan
Space Centre (Sriharikota Range SHAR),
Andhra Pradesh , using a Polar Satellite
Launch Vehicle (PSLV) rocket C25 at 09:08
UTC (14:38 IST) on 5 November 2013. [17] The
launch window was approximately 20 days
long and started on 28 October 2013. [5] The
MOM probe spent about a month in
geocentric , low-Earth orbit , where it made a
series of seven altitude-raising orbital
manoeuvres before trans-Mars injection on
30 November 2013 (UTC ). [18] After a 298-day
transit to Mars, it was successfully inserted
into Mars orbit on 24 September 2014.
It is India 's first interplanetary mission [19]
and ISRO has become the fourth space
agency to reach Mars, after the Soviet space
program , NASA, and the European Space
Agency. [20][21] It is also the first nation to
reach Mars orbit on its first attempt, and the
first Asian nation to do so. [22][23][24][25]
The spacecraft is currently being monitored
from the Spacecraft Control Centre at ISRO
Telemetry, Tracking and Command Network
(ISTRAC) in Bangalore with support from
Indian Deep Space Network (IDSN) antennae
at Byalalu .[26]

24/10/2014

What is birthday?
A question asked
by BBC World to many VIPs
around the globe....
the best answer given by Dr. Abdul Kalam.. "The only one day in life, where your mother smiled when u cried"....

23/10/2014

wish you a very happy diwali .......

21/10/2014

i wish if Sir Hari.k sir will lead us on this page.....

20/10/2014

comon guys... we need ideas....
share it with us if you have any....