So here is a example of argument paragraph which will be helpful for the student to under stand about an argumenr paragraph
Internet is Harmful For Our Regular Life
There are many reasons why internet is harmful for our regular life. First of all, internet is harmful for our regular life because it badly affects our social life. Nowadays , people are more involved in internet communication rather then social activities. People are more busy with using internet , more then real social communication. Secondly. internet is harmful for our daily life as internet us insecure. Internet us the field if digital programs which can easily be hacked. Recently, Bangladesh bank has been hacked by cyber criminal at China and they stole one million dollars . Finally, internet badly affects in our everyday life because it is harmful for our education. Students are getting addicted by social networking serviced like Facebook,Whatsapp,Viber. According to statistic students use internet more then 10 hurs daily in average. To conclude, for this reasons internet is harmful for our regular life.
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An extra second will make Tuesday longer than usual, according to NASA.
A ‘leap second’ will be officially added to June 30 this year to
account for the gradual decrease of earth’s rotation, said Daniel
MacMillan of Nasa's Goddard Space Flight Centre in Greenbelt.
The
slowing down is the result of a form of braking force caused due to the
gravitational tug between Earth, the Moon and the Sun.
Earlier,
scientists based time calculations on the Earth’s rotation, but after
introduction of Very Long Baseline Interferometry (VLBI), that changed.
The international network of stations that team up to observe
and correlate found that the planet's rotation is slowing down overall
because of tidal forces between Earth and the moon.
Roughly every
100 years, the day gets about 1.4 milliseconds, or 1.4 thousandths of a
second, longer which amount to a large difference if you add up those
discrepancies.
"At the time of the dinosaurs, Earth completed one rotation in about 23 hours," says MacMillan.
"In
the year 1820, a rotation took exactly 24 hours, or 86,400 standard
seconds. Since 1820, the mean solar day has increased by about 2.5
milliseconds."
By the 1950s, scientists were faced with the need
for more precise timekeeper than the Earth and in 1967, the second was
redefined to be based on predictable measurement made of electromagnetic
transitions in atoms of cesium.
These "atomic clocks" are
accurate to one second in 1,400,000 years and most people around the
world rely on the time standard based on the cesium atom: Coordinated
Universal Time (UTC).
Universal Time 1 (UT1) is based on VLBI
measurements which rely on astronomical reference points and are precise
up to 5 microseconds.
"These reference points are very distant
astronomical objects called quasars, which are essentially motionless
when viewed from Earth because they are located several billion light
years away," says Goddard's Stephen Merkowitz, the Space Geodesy Project
manager.
Nasa says although leap seconds were initially added to
provide a UTC time signal for sea navigation, introduction of GPS and
satellite navigation systems has made it no longer needed.
Now a leap second is added in the UTC to keep it within 0.9 seconds of UTI.
Normally,
the clock would move from 23:59:59 to 00:00:00 the next day. Instead,
at 23:59:59 on June 30, UTC will move to 23:59:60, and then to 00:00:00
on July 1. In practice, this means that clocks in many systems will be
turned off for one second.
Proposals to abolish the leap second
and let the two standards drift apart have also been made because of the
cost of planning for leap seconds and the potential impact of adjusting
or turning important systems on and off in synch.
If they are allowed to go further and further out of synch, the difference will be roughly 25 minutes in 500 years.
In
the meantime, leap seconds will continue to be added to the official
UTC timekeeping. The 2012 leap second is the 35th leap second to be
added and the first since 2008.
Astronomers have found evidence of hidden supermassive black holes in the universe.
Using NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) satellite
observatory, the team detected the high-energy x-rays from five
supermassive black holes previously clouded from direct view by dust and
gas.
The research, led by astronomers at Durham University in
Britain, supports that potentially millions more supermassive black
holes exist in the Universe, but are hidden from view.
"We have
been able to clearly see these hidden monsters that were predicted to be
there but had been elusive because of their 'buried' state," said lead
author George Lansbury, post-graduate student in the centre for
extragalactic astronomy.
Although only five of these hidden
supermassive black holes have been detected, "when we extrapolate our
results across the whole universe, then the predicted numbers are huge
and in agreement with what we would expect to see", Lansbury said.
The
scientists pointed NuSTAR at nine candidate hidden supermassive black
holes that were thought to be extremely active at the centre of the
galaxies.
High-energy x-rays found five of the black holes, and confirmed that they had been hidden by dust and gas.
The
five were much brighter and more active than previously thought as they
rapidly feasted on surrounding material and emitted large amounts of
radiation.
The results were presented at the Royal Astronomical Society's national astronomy meeting in Llandudno, Wales on July 6.
