分类目录归档：electric
Let's start with silence.
Silence is one of the most precious conditions for humans,
because it allows us to feel the depth of our presence.
This is one of the reasons why the advent of electric cars
Hello, how is everyone feeling?
(Cheers)
Are you ready to solve climate change?
(Cheers)
Good.
Do you know what a pettawat hour is?
Yeah, it's a unit of energy like kilowatt hour or megawatt hour.
I'v
I'm going to try to shine a historical light on our language,
and tell you a story about the electric vocabulary.
It all begins over 2,600 years ago.
An ancient Greek, called Thales of Miletus,
is tho
This is a crystal of sugar.
If you press on it, it will actually generate its own electricity.
How can this simple crystal act like a tiny power source?
Because sugar is piezoelectric.
Piezoelectric
If you were buying a car in 1899,
you would’ve had three major options to choose from.
You could buy a steam-powered car.
Typically relying on gas-powered boilers, these could drive as far as you wan
[Music]
[Music]
this little fourth grader
is trying to do her homework
but it's really hard to see
let alone learn when there's only a
candle and the wind keeps catching the
flame
i work here
on the r
[Applause]
good evening ladies and gentlemen
thank you for such a nice introduction
and it's actually a pleasure
to be talking today about a topic that
is very close to me both personally and
professi
[Music]
for the first time we are seeing
repercussions of climate change all
around us with increasing heat during
our summer months with increasing
instances of floods and tsunamis
and the unignorabl