Professor Brian Cox demonstrates a scientific experiment to measure how much energy from the sun falls on the Earth’s surface. Great HD clip from ‘Wonders of…
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Captain Jack says:
January 31, 2015 at 1:08 pm (UTC 0)
So how much energy can we get from the sun? It breaks down to about 1,100
watts per square meter or 112 watts per square foot. You can light up a 100
watt light bulb ever sq ft of land that is facing the sun during daylight
hours.
Now look at all this energy flowing to our planet every day and we are
using very little of it. Its free and doesn’t pollute the planet.
WOO BREAKER says:
January 31, 2015 at 1:44 pm (UTC 0)
Pedro Faria says:
January 31, 2015 at 2:32 pm (UTC 0)
Oh hey! Have you heard the talk about – Maxim Earth 4 Energy (do a search
on google)? Ive heard some great things about it and my sister in law got
cool returns with it.
benjamin perry says:
January 31, 2015 at 2:58 pm (UTC 0)
truly amazing, just makes me think how lucky i am to be born on such a
beautiful world with an amazing solar system and star.
benjamin perry says:
January 31, 2015 at 3:03 pm (UTC 0)
whats the music starting at 1.05 please???
Captain Jack says:
January 31, 2015 at 3:05 pm (UTC 0)
So how much energy can we get from the sun? It breaks down to about 1,100
watts per square meter or 112 watts per square foot. You can light up a 100
watt light bulb ever sq ft of land that is facing the sun during daylight
hours.
Now look at all this energy flowing to our planet every day and we are
using very little of it. Its free and doesn’t pollute the planet.
George Hawirko says:
January 31, 2015 at 3:18 pm (UTC 0)
So how much energy can we get from the sun? It breaks down to about 1,100
watts per square meter or 112 watts per square foot. You can light up a 100
watt light bulb ever sq ft of land that is facing the sun during daylight
hours.
Now look at all this energy flowing to our planet every day and we are
using very little of it. Its free and doesn’t pollute the planet.
Neil Griffiths says:
January 31, 2015 at 3:25 pm (UTC 0)
@abazdarhon simple..because of MONEY, and these greedy fat cats around the
world are making soooo much money draining fossil fuels from our planet. To
simply put up solar collective technologies all over and wind turbines and
power generated from water. We can even run cars on water or piss but
nooooo its not making money for the fat cats. This would be far more
effective and a million times greener and its not polluting our planet
either or destroying the eco system.
devinerhythms says:
January 31, 2015 at 3:48 pm (UTC 0)
BBC always does this better than north american tv.
i7887 says:
January 31, 2015 at 4:29 pm (UTC 0)
Your question doesn’t make sense. A watt is a unit of power, not energy, so
its units are joules per second (energy per time). So asking how much the
power the sun gives off, in a given time period, cancels the time part from
watts. This leaves you with only joules, a unit of energy. For example, a
75 watt bulb puts off 75 joules of energy in one second. Its an easy mix up
to make and i think its caused from the name “power” company. They sell
kilowatt-hours, which is energy, not power.
Josh Robertson says:
January 31, 2015 at 4:41 pm (UTC 0)
@jgauthier522 it was just a joke, i’m sure you’ll get over it.
TheAmazing Aliy says:
January 31, 2015 at 4:47 pm (UTC 0)
@abazdarhon Money.
frozel says:
January 31, 2015 at 5:23 pm (UTC 0)
That’s why I love physics too!
i7887 says:
January 31, 2015 at 6:03 pm (UTC 0)
Nah, seeing as how this was a homework problem in one of my astronomy
classes a few years ago. Maybe you should listen to your last comment.
Talia H says:
January 31, 2015 at 6:07 pm (UTC 0)
Ohhh. That makes sense. Thanks. 🙂
PeerlessKid says:
January 31, 2015 at 6:57 pm (UTC 0)
Love this man and his show 😀
Lexo Cee says:
January 31, 2015 at 7:48 pm (UTC 0)
I hate that shit. Can’t he at least say the real number too so I don’t have
to try to figure it out myself? 400 million million million million. That 4
x 10^26 right? So 400 septillion. Why make me go through all that trouble?!
HereToHelp says:
January 31, 2015 at 7:51 pm (UTC 0)
Industrialists help society, but they don’t do it for free. The sun might
give off a lot of energy in one spot, but our solar panels are barely
efficient enough to get even a fraction of that energy. Keep an eye out for
improvements in concentrated photovoltaics, and any industries working with
graphene. They will pave the way for cheaper, more efficient panels that
can be more widely distributed to buyers. This will also make the obsolete
panels cheaper, naturally.
Jerry Man says:
January 31, 2015 at 8:09 pm (UTC 0)
@IntrepidMoocher ok make some contributions 😀 ASAP … people are working
on that but as long as the oil industry is going … they will dissrupt the
development as much as posible!
Talia H says:
January 31, 2015 at 9:00 pm (UTC 0)
And a calculator… But wouldn’t it change according to the region you are
in? In Antarctica, for example, it would probably take much longer to heat
up a can of water. Right?
Npowell01 says:
January 31, 2015 at 9:24 pm (UTC 0)
@abazdarhon ’cause we’d have to hire 1000s to implement this new
infrastructure you speak of, 1000s to rip out the old infrastructure, &
we’d have to educate 1000s to do the work involved. New businesses would be
made and old businesses torn down. Meanwhile, greedy corporate CEOs make
plenty of money lording over things the way they currently are, & they’re
opposed to change because it requires effort on their part & they won’t be
around for the negative effects of fossil fuels anyway.
Aggravated Astronomer says:
January 31, 2015 at 9:27 pm (UTC 0)
@KingGoomba19 I’m not going to say your idea of interplanetary wires is
impossible. What matters is that it’s unnecessary and wasteful to the point
of absurdity. It’d be like building a suspension bridge entirely out of
recycled plastic bags. A needlessly difficult solution. Just an idea but a
better alternative might be to transmit energy using high power lasers
fired between platforms orbiting the planets. But over such distances you’d
have to consider relativity among other things.
raydredX says:
January 31, 2015 at 9:34 pm (UTC 0)
2:05->”That boring math, let’s cut that part, no one will care.” … It’s
an easy calculation (if you have the data) but that was a bit annoying. Oh
well.
UltraSonique says:
January 31, 2015 at 10:13 pm (UTC 0)
My geek hero. And THAT is why I love physics.
tilemacro says:
January 31, 2015 at 11:07 pm (UTC 0)
A plain lie.