Covering World

2014 CHEVROLET CAMARO Z28

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<span class="ndata">Chevrolet has announced that it will
charge a whopping $75,000 for its upcoming 2014 Camaro Z/28 when it goes on
sale this spring. Powered by a 7.0-liter LS7 V8 engine, with 500 horsepower and
470 lb-ft. The car features a full body kit that includes a front splitter that
works with an underbody panel to reduce drag, fender flares, side skirts, a
large trunk-mounted spoiler and a functional air diffuser integrated into the
rear bumper.</span></div>
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2014 CHEVROLET CAMARO Z28

Chevrolet has announced that it will charge a whopping $75,000 for its upcoming 2014 Camaro Z/28 when it goes on sale this spri...

15:28

Rimac Greyp G12 Electric Bike

Rimac Greyp G12 Electric Bike

The Rimac Greyp G12 Electric Bike is half electric bike, half motorcycle. It is a bicycle when you want it or a motorcycle when you need it...

15:26

2014 Polaris RZR XP1000

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<span class="ndata">The Polaris RZR XP 1000 powered
by a 1000cc engine that delivers 107 hp. It comes with dual-piston
callipers and 248mm ventilated disc brakes on each of its wheels. It sells for
$19,999(USD). Check out the video, cool.</span></div>
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2014 Polaris RZR XP1000

The Polaris RZR XP 1000 powered by a 1000cc engine that delivers 107 hp. It comes with dual-piston callipers and 248mm ventilated disc ...

15:25

BMW i8 Hybrid

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<span class="ndata">BMW has officially unveiled the
BMW i8, a two-plus-two, swan-wing-door hybrid coupe that features a BMW Twin
Power Turbo 1.5-litre three-cylinder petrol engine with 170 kW (231 hp) of peak
performance on the rear wheels, and an electric motor sends 131 hp and 184
lb-ft of torque through a two-speed automatic to the front wheels. With
all-wheel drive at its disposal, the total system power sits at 362 hp and 320
lb-ft of torque, and allows the i8 to scamper to 62 miles per hour in just 4.4
seconds, and a top speed of 250km/h (155mph). That excellent performance
is offset by an estimated fuel economy figure of 94 miles per gallon. Prices
start at $135,972, the second most expensive member of the BMW range, behind
the luxury rocket known as the 760Li.</span><br />
<span class="ndata">"Driving Experience Control switch and eDrive button
allow driver to choose from five driving modes, range of up to 35 kilometres
(22 miles) on electric power alone and a top speed of 120 km/h (75 mph). COMFORT
mode offers optimum balance between dynamics and efficiency, combined range in
everyday conditions: over 500 kilometres (310 miles). SPORTS mode with
ultra-intense boost function provided by the electric motor. ECO PRO mode can
be used in both all-electric mode and hybrid mode."</span></div>

BMW i8 Hybrid

BMW has officially unveiled the BMW i8, a two-plus-two, swan-wing-door hybrid coupe that features a BMW Twin Power...

15:23

Triple-star system could reveal 'true nature' of gravity

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A triple-star system <a href="https://public.nrao.edu/news/pressreleases/pulsar-in-stellar-triple-system">discovered
by astronomers</a> could help resolve problems with Einstein's theory of <a href="http://en.wikipedia.org/wiki/Theory_of_relativity#General_relativity">General
Relativity</a> and shed light on the true nature of gravity.<br />
The unique system is comprised of two white dwarf stars and a superdense
neutron star (pulsar) packed into a space smaller than the Earth's orbit around
the Sun. The constellation allows scientists to measure the complex
gravitational interactions between the stars in a way that hasn't been possible
before to help reveal the true nature of gravity.<br />
The pulsar -- a neutron star that emits lighthouse-like beams of radio waves
through space as the object spins -- was first discovered by a graduate at West
Virginia University called Jason Boyles using the <a href="https://science.nrao.edu/facilities/gbt/">National Science Foundation's
Green Bank Telescope (GBT)</a>. It is 4,200 light-years away from Earth and
spins 366 times every second. These sorts of rapidly-spinning pulsars (known as
millisecond pulsars) are very useful to astronomers, who can use them to study
gravitation.<br />
After spotting the pulsar, astronomers noticed two white dwarf stars -- one
in close orbit with the pulsar and another more distant one. It is the first
time a millisecond pulsar has been found in such a system, which provides, in
the words of Scott Ransom, "tremendous opportunity to study the effects
and nature of gravity".<br />
Ransom is an astronomer at the National Radio Astronomy Observatory. He
says: "This triple system gives us a natural cosmic laboratory far better
than anything found before for learning exactly how such three-body systems
work and potentially for detecting problems with General Relativity that
physicists expect to see under extreme conditions".<br />
Having identified the system, scientists observed it intensively with the
GBT, the <a href="http://www.naic.edu/">Arecibo</a> radio telescope in Puerto
Rico and the Westerbork Synthesis Radio Telescope in the Netherlands,
incorporating additional data from other satellites and telescopes.<br />
"The gravitational perturbations imposed on each member of this system
by the others are incredibly pure and strong. The millisecond pulsar serves as
an extremely powerful tool for measuring those perturbations incredibly
well," says Ransom.<br />
By recording the lighthouse-like beams of radio waves with accuracy, the
team was able to calculate the geometry of the system and the masses of the
stars with 'unparalleled precision' -- some of them are accurate to hundreds of
metres, according to Anne Archibald from the Netherlands Institute for Radio
Astronomy. Archibald used the measurements gleaned from the system to build up
a simulation.<br />
The research combines techniques pioneered by Isaac Newton to study Earth's
gravity with the alternate <a href="http://en.wikipedia.org/wiki/General_relativity">theory of gravitation
proposed by Albert Einstein</a>. It is hoped that it could pave the way for the
next theory of gravity.<br />
The team is particularly interested in looking for a deviation from the
Equivalence Principle, which states that the effect of gravity on a body
doesn't depend on the size of material of that body. It explains why on the
Moon, where there is no air resistance, a feather and a hammer will fall at the
same speed. It also explains why balls of different materials will roll down a
slope at the same time -- as first shown by Galileo.<br />
Ransom explains: "While Einstein's Theory of General Relativity has so
far been confirmed by every experiment, it is not compatible with quantum
theory. Because of that, physicists expect that it will break down under extreme
conditions. This triple system of compact stars gives us a great opportunity to
look for a violation of a specific form of the equivalence principle called the
<a href="http://en.wikipedia.org/wiki/Equivalence_principle#The_strong_equivalence_principle">Strong
Equivalence Principle</a>."<br />
When a star explodes and then collapses into a superdense neutron star, some
of its mass is converted into gravitational binding energy that holds the star
together. According to the Strong Equivalence Principle, the binding energy
will still react gravitationally as if it were mass. Most of the alternative
theories to General Relativity suggest that it will not.<br />
The triple star system should allow astronomers to know which is the case
through high-precision observation of the pulsar's "lighthouse"
flashes. If the Strong Equivalence Principle holds, then the gravitational
effect of the outer white dwarf would be identical for both the inner white
dwarf and the pulsar. If it doesn't hold, then the outer star's gravitational
effect on the inner white dwarf and pulsar will be slightly different.<br />
"Finding a deviation from the Strong Equivalence Principle would
indicate a breakdown of General Relativity and would point us toward a new,
correct theory of gravity," said Ingrid Stairs of the University of
British Columbia<br />
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Triple-star system could reveal 'true nature' of gravity

A triple-star system discovered by astronomers could help resolve problems with Einstein's theory of General Relativity and sh...

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