-------------------------------------------
my new GoPro :D:D:D:D:D:D - Duration: 4:38.
WARNING VERY LOWE VOICE TERN ON CC BEFORE VIDEO
-------------------------------------------
MEME MAPS. - Duration: 0:10.
juicy memes,
-------------------------------------------
Bitter gourd with salted egg (酥脆苦瓜炒咸蛋) - Duration: 2:31.
Turn on subtitles for instructions
50g all purpose flour
pinch of salt
1/2 tsp baking powder
100ml ice water
mix evenly
deep-fry for 2~3 minutes
Steam for 10 minutes
mash it
2 tbsp butter
when the butter almost melt, add the mashed salted egg
when it become foamy, add fried bitter gourd and mix evenly
Thank for watching!
-------------------------------------------
VIDEO: Breezy but sunny on first day of new year - Duration: 3:48.
IT'S A WHOLE NEW YEAR AND
WE GET THE START THIS ALL OVER
AGAIN.
LAST JANUARY WAS NOT THAT BAD.
DECEMBER NOT TOO BAD.
LOOK WHAT HAPPENED TODAY.
WE STARTED OUT ABOUT NOON TODAY
AT ABOUT 34 DEGREES.
SINCE THEN, IT HAS BEEN A STEADY
CREEP UP TO 40 DEGREES.
AS YOU LOOK OVER THE
CITY,
DECORATED UP WITH THE 2017 LOGO
READY.
SOUTHWEST WAS AT 15 -- SOUTHWEST
WINDS AT 15.
IF YOU ARE OUT IN THE RAIN, IT
IS COLD RAIN.
WHAT WILL HAPPEN WITH THE
TEMPERATURE OVERNIGHT, IT WILL
HOLD STEADY.
AS SHOWERS WIND DOWN INTO EARLY
MORNING AND GET BACK TO
SUNSHINE, IT LOOKS LIKE TOMORROW
, KIND OF BREEZY OUT THERE.
CHECK OUT THE TEMPERATURES.
STILL HAVE THE HIGH TEMPERATURE
FOR THE DAY.
WE START TO SEE THE TEMPERATURES
JUST A LITTLE BIT COOLER.
WITH THOSE COOLER TEMPERATURES
WE HAVE SEEN SOME SNOW.
WIND OUT OF THE SOUTH RIGHT NOW.
RUNNING ABOUT 50 MILES PER HOUR.
HERE IS WHAT IS SHOWING UP ON
RADAR.
RIGHT ALONG 495.
IF YOU ARE IN THE RIGHT SIDE,
YOU ARE GETTING RAIN.
IF YOU ARE ON THE LEFT SIDE,
YOU'RE GETTING SNOW.
WE WILL CONTINUE TO SEE THAT FOR
THE NEXT THREE HOURS OR SO.
FIRST NIGHT CELEBRATION
COULD BE
ON THE DAMP SIDE OVER THE NEXT
FEW MINUTES.
DOWN IN THE SOUTH, WE HAVE NOT
SEEN MUCH IN THE SOUTH SHORE.
OUT TO THE WEST, WE HAVE SOME
SNOW.
THE OTHER THING
IS THEY SLOW THE
SPEED LIMIT DOWN ON THE MASS
PIKE NEAR THE ALBANY AREA
BECAUSE IT IS SLIPPERY.
MILD WEATHER IS FLOWING OVER THE
TOP.
THAT IS WHY WE ARE SEEING THE
SNOW CHANGEOVER TO RAIN.
THIS IS THE MAP AT MIDNIGHT.
YOU SEE THE RAIN, THE SNOW.
WE ARE WINDING DOWN THE SNOW
HERE.
BY THE TIME YOU GET TO 5:00
A.M., THERE MIGHT BE A SPRINKLE
OR TWO DOWN BY THE CAPE.
WE SHOULD LOOK AT SUNSHINE.
HERE THE TEMPERATURES AT 8:00
A.M.
BY MORNING WE ARE BACK INTO THE
40'S.
HERE IS WHERE WE WILL SEE AN
INCH OF SNOW, BUT JUST A LIGHT
COATING ELSEWHERE
AND FOR
BOSTON, A CHILLY RAIN.
TONIGHT, LIGHT RAIN AND SNOW,
TEMPERATURES HOLDING STEADY.
THEY MAY, THEY -- THEY MAY COME
UP A FEW DEGREES.
AS THIS SYSTEM GOES PAST US AND
THOSE OUT, WE TURN OUR ATTENTION
TO WANT TO THE SOUTH.
THERE IS A NEW AREA THAT WILL BE
LIFTING ITS WAY UP HERE MONDAY
NIGHT AND THAT WOULD PRESENT
WINTRY MIX.
TOMORROW WE HAVE GOT SUNSHINE.
BREEZY, ABOUT 46 DEGREES.
THEN WE HAD TO MONDAY AND HAVE A
SUNNY DAY.
BY NIGHT THERE COULD BE A MIX
COMING IN.
THAT STARTS TO
LIFT ITS WAY
NORTHWARD AND THAT IS RUNNING
INTO COLD AIR.
BY THE
TIME YOU GET TO TUESDAY
AFTERNOON WHEN THE HEAVY RAINS
COME IN, IT IS FULL-FLEDGED
RAIN.
WEDNESDAY, STILL HOLDING ONTO
WARM TEMPERATURES IN THE
MORNING.
IN THE AFTERNOON IT WILL START
TO FALL OFF.
BY THE TIME WE GET TO THURSDAY
AND FRIDAY, IT IS COOLER.
COOL ENOUGH ON FRIDAY THAT WE
COULD BE TALKING ABOUT A LITTLE
SNOW.
NOT A LOT OF UNIFORMITY IN THE
COMPUTER MODELS.
SOME ARE SAYING A LITTLE SNOW AT
THE CAPE.
WE WILL SEE.
-------------------------------------------
Tzuyu nhận nhiều lời khen nhan sắc khi biểu diễn cùng Hani, Seol Hyun - Duration: 2:41.
For more infomation >> Tzuyu nhận nhiều lời khen nhan sắc khi biểu diễn cùng Hani, Seol Hyun - Duration: 2:41. -------------------------------------------
Sun and Clouds Sunday - Duration: 3:29.
RAISE
$172,000.
TO DONATE HAD TO WLWT.COM.
>> HEADING INTO THE NEW YEAR I
THOUGHT WE WOULD REVIEW FOR OUR
TEMPERATURES.
WE DID BREAK A COUPLE OF
RECORDS.
BACK IN FEBRUARY, A RECORD HIGH
TEMPERATURE FOR THE DAY.
IN MAY WE HAD OUR ONLY LET --
RECORD LOW TEMPERATURE.
WE DROPPED TO 31 DEGREES.
A PRETTY QUIET SUMMER.
A RECORD HIGH OF 82.
MID-NOVEMBER 76 DEGREES.
THE RECORD HIGH TEMPERATURE
AFTER CHRISTMAS.
WE PICKED IT 71 DEGREES.
WE DID HAVE HIGH AND LOW
RECORDS.
WE HAD A RECORD WARMER SLOW
TEMPERATURE.
HERE IS A LOOK AT THE SATELLITE
AND RADAR.
THEY HAVE SWITCHED TO THE EAST.
WE ARE DRY FOR THE LATE EVENING.
IT IS CLOUDY.
WE STILL HAVE THE POTENTIAL TO
SQUEEZE OUT ANOTHER STRAY SHOWER
.
NOTHING ON THE RADAR NOW.
WE ARE LIKELY TO SEE FAIRLY
QUIET CONDITIONS TOWARD
MIDNIGHT.
TEMPERATURES HAVE BEEN VERY
UNIFORM.
AS THE CLOUDS CLEAR OUT
TEMPERATURES DROP OFF PRETTY
QUICKLY.
WE WILL START TO CLEAR OFF LATE
TONIGHT.
SOUTHWEST WIND AT 10 MILES PER
HOUR.
STRONGER WIND DIMINISHING OFF TO
THE NORTHEAST.
WE DID HAVE WIND PEEKING, SOME
HIGH SPOTS 44 MILE-PER-HOUR WIND
GUSTS.
THE STRONG WIND THIS MORNING AND
THE AFTERNOON DIMINISHING FOR
OUR EVENING.
THE TEMPERATURE AT 40.
IT DOES FEEL LIKE 36 DEGREES.
WE ARE AWAITING A COLD FRONT TO
ARRIVE.
HIGH PRESSURES AGAINST THE
BACKSIDE OF THAT COLD FRONT.
THESE GUYS WILL CLEAR OUT SOME
AND GIVE US THE SHOT OF SOME
SUNSHINE.
MIDDAY SUN AND CLOUDS FOR THE
AFTERNOON.
CLOUDS WILL THICKEN ACROSS THE
AREA.
EVENTUALLY CLOUDY SKIES INTO
SUNDAY EVENING.
NOT A LOT FOR MEASURABLE
RAINFALL.
CAP CONDITIONS, WE SET THE STAGE
FOR MOISTURE AND A BETTER CHANCE
FOR RAIN INTO MONDAY.
TIMING TONIGHT, A CHANCE FOR
THAT ACTIVITY AROUND THE
MIDNIGHT HOUR.
AIR TEMPERATURES ON THE MID TO
UPPER 30'S.
SOME CHILLY SPRINKLES.
MAYBE A WET SNOWFLAKE.
IT WON'T BE A PROBLEM FOR
TRAVELING.
THEY QUICKLY PUSH OFF TO THE
SOUTHEAST.
CLEARING SKIES, SOME SUN
STARTING OFF.
BY MONDAY AND TUESDAY EVEN
THOUGH WE HAVE CLOUDS,
TEMPERATURES WILL BE MILD.
NOT A BAD START TO OUR WEEK.
THEY ARE GOING TO DROP OFF FROM
THERE.
-------------------------------------------
KUZUZANGPO - Kezang Dorji Official Music Video - Duration: 3:00.
Chilo chigtong goupja-gepchu jagu- (1989)
Chida chupa chitsey-ngyerngyi lu (October 22)
Drin cheywai ama gi mili nangnu- (My mother gave birth to me)
Nga lo nga tsintsey (Till I was five)
deyyi ikhalu (I lived in the village)
Chungku gang gi ditsey (My childhood days)
datoya cheri yey (I still remember)
Chelu labru nomey (Even if I tell you)
chegi yira michey (I feel you will not believe)
Mapa eikha deydep einbachin (But if you ever lived in the village)
cheygi hago- (You would know)
Eikha la beyni genkhur (In the village you need to work)
chungku ley bago (From the time you are a kid)
Tsemanalay shing thu (From the forest)
zhinggi labey nortso (Collect firewood and look after cattle)
Nakey shamu thubey (I collected ferns and mushrooms)
zayi asham bokpi kharang chikha (and had it with corn and corn flour)
Diga--khorlam madey, (At that time there were no roads)
logmey ya mi (There was no electricity)
Tip eein ngachey (We used to light)
thrimi da sati (torch and kerosene lamps)
Ngey azha da nga (My uncle and I)
radio chi badi (took a radio)
Cheri yey,nga nyen nyem, (I remember listening)
'Jalam Gi Azhi' (To the song Jalam Gi Azhi)
'drom naley key deybey thenmi lu tadi (Hearing the sound coming from the box)
Heyma namya mathomlay namto ya langyi. (Got me shocked as I had never seen such a thing before)
Lo dru joda (When I was six)
Dewathang lu poyi (We moved to Dewathang)
Digang numkhor dang TV (At that time I saw vehicles and TV)
go dangpa go thongyi (for the first time)
Dromna mi chungku thong (Seeing tiny people in the box)
haley droya droyi (Both surprised and scared me)
Deley ma deyyi deyyi (But by staying there, eventually)
gachi eeinna hagoyi (I understand what that was.)
Gago nomey nga (I feel so funny)
dato ditsu korley labda (When I talk about it right now)
Deybewda ngoma jungjum eein (But it happened for real)
na ma heybei jabkha.. (before I got here.)
Ani zhabthra meyn la. (This is not a song)
Ngarai ngotrey beydo. (I am introducing myself)
Atsi zhumeyla. (Excuse me.)
Datora thenwong nga (I will be back in a while.)
Kuzu Kuzu wai! (Hello! Hello!)
Tey leyzhim beyra yey ga. (Hope you are doing fine.)
wai, cheya dusa! (Hey, you're here too!)
Dari naba thongni minu baya (I don't see you these days)
gachi bedapmo? (What's been up?)
Kuzu kuzu wai! (Hello! Hello!)
Nada heyma cheyyi gamo? (Have we met before?)
Ngo sheyni zoomchi dusa (You look familiar.)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Gom mathrey mey''la….. (Please forgive me.)
dachi gatey deyyi? (Where was I?)
Aeyn! Dewathang lu dey (Yeah, staying in Dewathang)
ngarai korley leysha sheyyi (I learnt a lot about myself)
Sheychi goleybey (Slowly I knew)
meyn nga apa meypei alu (I wasn't a kid without a father)
Eeinru hagowai kab (But by the time I knew)
pham soso jo tsanu (My parents had separated)
Cheri wongmey lalugi (I remember some calling)
ngalu lablab kokti (Me a b******)
Eeinru zeypa gomdi (But I controlled my anger)
ganiya mabey logdi (and did not react)
Khongda drenda bey (Behaving like them)
khungmi nodi (would not be worth, I thought.)
Chowa lhang deyyi (Had pain and hurt)
sem donghi (On my mind and in my heart.)
Charo tsugi pham (Everytime I saw my friends)
chikha deysa thomda (with their parents)
Tsorwa-madrawchi- (A different kind of feeling )
wongni yey jangkhona— (used to grow under my chest)
Galu ya malab. (I never told no one)
Chikha then macho (I never let it come out)
Nazu ib zha, (I hid my pain)
ngu deyyi nangna (And cried in the inside.)
Nyimchi bewda- (And one day)
Eminem gi rap goyi (I heard Eminem's rap)
Khoggi labmi gayra (Everything he said)
nyey soong zoombey tsoyi (felt like my own story)
Ngachey nyigi mitsey halam (Our lives)
chora thepbey thongyi (looked the same)
Khogi zhabthra ngen (Listening to his songs)
semkha dewa thopchi (Eased my feelings)
Goleybey (Slowly)
ngaya rap chabni gotsuyi (I also started rapping)
Nyima chiru meyba--- (Round the clock)
nga tsamni gotsuyi (I kept composing)
Da jangwa beyyira— (I have practiced for many years )
lo leysha yasongyi (for many years)
Digi drubdey dari (Its result is what)
chelu tenba woom eein (I came to show you.)
Kuzu Kuzu wai! (Hello! Hello!)
Tey leyzhim beyra yey ga? (Hope you are doing fine.)
wai, cheya dusa! (Hey, you're here too!)
Dari naba thongni minu baya (I don't see you these days)
gachi bedapmo? (What's been up?)
Kuzu kuzu wai! (Hello! Hello!)
Nada heyma cheyyi gamo? (Have we met before?)
Ngo sheyni zoomchi dusa (You look familiar.)
Nada cheybey namay samay Sem gayi mey (I am very happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Nada cheybey namay samay Sem gayi mey (I am very happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Ngalu tadira dey, (Keep looking at me)
nga zoni mep beywong (I'm gonna do so much more)
Nga dato di mo, (And right now)
gotsup chi eein (I just got started)
Ngalu tadira dey (Keep looking at me!)
Ngalu tadira dey (Keep looking at me!)
Ngalu tadira dey, (Keep looking at me)
nga zoni mep beywong (I'm gonna do so much more)
Nga dato di mo, (And right now)
gotsup chi eein (I just got started)
Ngalu tadira dey (Keep looking at me!)
Ngalu tadira dey (Keep looking at me!)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
Ngey ming Kezang Dorji. (My name is Kezang Dorji.)
Nada cheybey sem gayi (I'm so happy to meet you.)
Kuzuzangpo! Kuzuzangpo! (Hello! Hello!)
-------------------------------------------
Learn English - Weekly Tip 12 for Chinese Speakers - to fly or to fire kite? (with subtitles) - Duration: 2:12.
Hello everyone, and welcome back to 'One
English Tip in One Minute for Chinese
Speakers (along with its many varieties).'
In these videos I discuss, each week, one
common English mistake made by Chinese
speakers...and this is video number 12.
As I've said before, I think it's a very
smart, cool and practical thing to do to
work to improve your English. In these
videos I show you a slide, and on the
slide there are two sentences: One is the
correct way that someone who speaks
English natively would say it,
the other is the wrong way that many
Chinese speakers might say it. Your
job is to decide which one is correct. So
do that now. Read the sentences,
listen to me read the sentences, pause
the video, think about your answer and I
will discuss the answer in the slide that follows this slide.
So in an ideal world you got this
without much trouble and you can sort of
move on without spending too much time
on it. But it's not an ideal world, is it?
I'm sure many of the viewers of this
video got it wrong, which is not a big
deal all. It just simply means you
have to study. I've given you three
sentences you can study from. It's a very simple
beginning, I know. Memorize the sentences,
review them -- always, always review, it's
very important -- and put into practice
what you've learned through speaking or
writing or both.
-------------------------------------------
Noo Phước Thịnh: 'Tôi mãi mãi là đứa em trai của Thủy Tiên' - Duration: 8:03.
For more infomation >> Noo Phước Thịnh: 'Tôi mãi mãi là đứa em trai của Thủy Tiên' - Duration: 8:03. -------------------------------------------
Steeple removed at damaged Lebanon church - Duration: 1:49.
THE ORDEAL IS NOT OVER FOR THOSE
THAT HAVE A DEEP CONNECTION WITH
THE CHURCH.
>> IT IS HEARTBREAKING.
I WORKED ON THE CHURCH QUITE A
FEW YEARS AGO AND REMEMBER
CLIMBING UP TO THE TOP OF THAT.
CHERISE: SO MANY PEOPLE IN THIS
COMMUNITY HAVE MEMORIES LIKE
THES ABOUT THIS LONG BEGIN IN
THE COMMUNITY ON SCHOOL STREET
HADLEY BURNED IN A FIRE THIS
WEEK.
>> IT IS HARD TO EVEN TALK ABOUT
IT.
SO MANY GOOD PEOPLE HAVE DONE SO
MU GOOD FOR A LOT OF FAMILIES.
IT IS DEVASTATING.
I WAKE UP IN THE MORNING AND I
CANNOT EVEN BELIEVE THAT IT
HAPPENED.
CHERISE: SATURDAY, A CRANE WAS
CALLED IN AFTER FIRE OFFICIALS
CONFIRMED THIS WEEK THAT THEY
COULD NOT INSIDE TO
INVESTIGATE UNTIL THE STEEPLE
AND THE BELL INSIDE WERE SAFELY
REMOVED.
FOR FEAR THAT THE STRUCTURE
COULD COME TUMBLING DOWN.
CHERIS IT ALREADY HAS.
A GOFUNDME HAS BEEN CREATED TO
HELP REBUILD THE CHURCH ONCE
DEMOLITION IS COMPLETE.
AS OF SATURDAY EVENING, THE FIRE
CHIEF SAYS THERE IS NO LONGER
ANY CONCERN ABOUT A COLLAPSE AND
SCHOOL STREET IS OPEN AGAIN FOR
TRAFFIC.
WHILE THE CHURCH MAY BE A TOTAL
LOSS, PARISHIONERS MAY BE ABLE
TO SALVAGE PIECES FROM THE OLD
BUILDING AS A WAY TO HOLD ONTO
THEIR PAST.
>> IT WILL NEVER B REBUILT THE
WAY THAT IT WAS.
THERE ARE A LOT OF PEOPLE
HURTING RIGHT NOW.
-------------------------------------------
THANK YOU FOR 500 SUBSCRIBERS!!!!! - Duration: 4:36.
For more infomation >> THANK YOU FOR 500 SUBSCRIBERS!!!!! - Duration: 4:36. -------------------------------------------
Schrödinger equation 6: Exponential function and Imaginary exponents - Duration: 10:10.
Hi!
This episode, we're going to be looking at something that
comes up a huge amount in physics,
especially quantum physics and thermodynamics,
namely, the exponential function e to the x.
Now, don't be frightened. You've already seen it.
I just didn't call it by its name.
It'll help out quite a lot with the notation in the next few episodes
It's sometimes written as exp of x,
usually to avoid having a ton of stuff jammed into a tiny superscript.
It's just another way of writing exactly the same thing.
You might have heard of e as an example of an irrational number,
about 2.718,
and that by putting any number to the power of a whole number
is the same as multiplying that first number by itself,
the second number of times,
and while that's sort of true,
it doesn't really matter here, and confuses things quite a bit.
We're going to start from a more relevant definition of e to the x,
which is that:
e to the zero equals one
and for all values of x, the rate of change in e to the x,
with respect to changes in x, is itself.
In other words, it's derivative is also e to the x.
This may seem like a strange definition,
but there is exactly one function that satisfies these two criteria,
even supposing we don't assume anything about what an exponent is,
and it's actually how e to the x originally came to prominence.
By the first criterion,
the value is one when the exponent, x, is zero,
and by the second criterion,
at that point, the slope must also be one.
As x increases, e to the x increases, initially at the same rate as x,
but as its value increases,
by the second criterion, its slope must also be increasing.
If we take a huge number of tiny steps along,
each time, getting the value, and then updating the slope,
to figure out how fast to go up on the next step,
we can trace out the function.
As the size of steps approaches zero,
the values we will get approach the true values.
We can do the same thing in the opposite direction, to get values for when x less than zero,
just moving down and updating the slope, instead of moving up.
This doesn't work with any other number as the base of the exponential, either.
For example,
the derivative of 2 to the x won't be 2 to the x.
It will be off by some constant factor.
For noise-free quantum physics,
the exponential function is most
commonly used in a very particular way
and we've already seen one we just
weren't calling it that X can be
anything
so if we just replace all axes with
another value let's say five x the
equation should still be true and we get
this this says that the rate of change
in each of the five x with respect to
changes in 5x is equal to eat at the 5x
what's d 5x though
well suppose we start with some value of
x let's call it X 0 and then we add some
amount DX to it
how much did 5x change well 5x starts
out as 5 x 0 and after increasing X it's
five times x0 plus DX or five x 0 plus
5dx that means 5 x increases by 5dx when
x increases by DX
in other words d 5 x equals 5dx that's
just a long-winded way of saying that if
you multiply two numbers by five
the difference is five times larger than
it was
replacing the 5x with 5dx gives us this
so then we can multiply both sides by 5
and get this the number five was
arbitrary so this works for multiplying
X by any value a even if it's a complex
number the case that comes up over and
over in quantum physics is where a is an
imaginary number
like I or negative 7 I but what does
that mean what is e to the power of an
imaginary number
let's suppose a is I since multiplying
by i rotate something a quarter turn in
phase this says that as X changes each
of the IAC's always changes in a
direction whose phase is a quarter-turn
different from the value of e to the ikx
we know that at x equals 0 e to the I
acts will be e to the 0 which is one and
as we saw in previous episodes if you
only ever change something in a
direction that's a quarter-turn
different from its current value it
doesn't change the magnitude it only
rotates the phase at a rate equal to the
magnitude of the derivative which in
this case is 1 Radian per meter since
the magnitude of e to the I ax is 11 x
equals 0 and it never changes its always
magnitude 1 and the phase rotates at one
Radian per meter everywhere
this means that each of the I acts for
any value of x has a phase of X radians
and magnitude 1 if we have e to the ikx
the magnitude of the derivative is k +
the derivative is still a quarter turn
from each of the ikx so the magnitude
would still be one everywhere that the
phase would rotate at k radians per
meter everywhere at position acts the
phase would be KX radians
as you can see each of the ikx is
exactly the starting wave from last time
an interesting property of this is that
since we can reverse the phase rotation
by replacing I with- I and the complex
conjugate of a number just has the phase
negated we know that each of the
negative ikx must be the complex
conjugate of e to the ikx since the
magnitudes of both each of the ikx and e
to the negative x KX r1 and their
complex conjugates of each other
multiplying them together gives the
constant value 1 e to the ikx describes
the initial state of the wave we looked
at last time but we also observed that
the phase changed over time as the wave
move forward since the phase-change by-
h-bar over 2 m times K squared every
second multiplying by time t in seconds
gives the total phase change after time
T combining this phase with the phase KX
from the initial wave means that this
wave function at position X and time T
can be written like this that's super
script is a bit awkward to read so we
can write it using X which means exactly
the same thing as e to the power of the
thing in the parentheses but is easier
to read in this case I sometimes write
at one way and sometimes the other way
depending on how bulky the exponent
books you can double check that if you
plug in 0 for the time one of the terms
disappears so it simplifies back to our
initial wave as i mentioned at the
beginning of this episode this notation
looks a bit complicated but just
remember that whenever you have eaten
the I times anything it has magnitude 1
and the phase is whatever the is x in
this case the phase changes at a
constant rate as you move along X and it
changes at a constant rate as time moves
forward so we have exactly the simple
wave moving forward that we saw last
time
it's just written in a different way
that can be used consistently in other
equations if you remember back
we also found an episode 5 that the
second derivative of the initial wave is
negative K squared times the wave itself
or in this notation the second
derivative of e to the ikx is just
negative K squared times e to the ikx
you can find the same thing by taking
the derivative twice and realizing that
you can take any constant factors from
inside the derivative to outside because
just as we saw before the tip of an
arrow that's k times as long
we'll have to move k times as fast to
rotate the same number of radians per
meter and if the arrow is rotated by a
quarter turn the direction it's moving
will also be rotated by a quarter-turn
if we have multiple variables and we're
only taking the derivative with respect
to one you can just treat the others as
constant values instead of variables for
example these are the derivative with
respect X and the derivative with
respect to t for the time-dependent
solution i glossed over some details
here but I wouldn't worry too much about
them right now we've been using
lowercase K for the angular wave number
in radians per meter when people have an
angular velocity in radians per second
namely how fast something is rotating as
time progresses it's often notated using
the lowercase Greek letter Omega this
wave is rotating at negative H bar over
2m times K squared radians per second so
that would be the angular velocity for
this way we'll be using this notation a
lot in the next few videos because it
will make it much easier to reason about
these waves mathematically when it
starts becoming difficult to visually
follow everything that's going on
see you later
-------------------------------------------
Meu vídeo editado - Duration: 2:17.
For more infomation >> Meu vídeo editado - Duration: 2:17. -------------------------------------------
New Year's celebrated in Portsmouth - Duration: 1:42.
CALLERY IS IN PORTSMOUTH
WITH HOW PEOPLE ARE CELEBRATING.
TIM: IT WAS QUITE THE NIGHT AS
THOUSANDS GATHERED IN MARKET
SQUARE FOR FIRST NIGHT
FESTIVITIES.
THE CITY OF PORTSMOUTH WELCOMING
IN THE NEW YEAR IN STYLE.
>> I LOVE PORTSMOUTH.
TIM: FIRST NIGHT PORTSMOUTH IS
PUT ON EACH YEAR.
ORGANIZERS SAY IT IS NOT ONLY AN
OPPORTUNITY SHOWCASE WHAT THE
CITY HAS TO OFFER BUT THE
PRIMARY FOCUS IS GIVING LOCAL
TALENT SOME TIME IN THE
SPOTLIGHT.
WE ARE SHOWCASING LOCAL
PERFORMERS, MUSICIANS THAT WE
ARE SO LUCKY TO HAVE IN THIS
REGION.
♪
TI THE NIGHT WAS FILLED WITH
FAMILY FUN.
EIGH VENUES OF ENTERTAINMENT.
INCLUDING PUPPET SHOWS, ICE
SCULPTURES, CHI TASTING AND A
DANCE PARTY.
WE HAVE BEEN WANDERING
AROUND.
WE HOPE TO DO SOME ACTIVITIES
HERE.
WE LOVE FIRST NIGHT.
IT IS REALLY FUN COMING HERE
AND DOING ALL OF THE DIFFERENT
ACTIVITIES.
TIM: THE NIGHT, TOPPING OFF WITH
A DAZZLING DISPLAY OF FIREWORKS
OVER SOUTH MILL POND.
SPECTATORS SAY THERE IS NO WHERE
ELSE THEY WOULD RATHER BE TO SAY
GOODBYE TO THIS YEAR AND PREPARE
FOR WHAT IS TO CALM IN 2017.
-- FOR WHAT IS T COME IN
2017.
-------------------------------------------
Скажи-ка Милая, #Песни о Любви, Шансон, Дмитрий Романов - Duration: 3:49.
Tell me dear, love songs, Chanson
-------------------------------------------
Sơn Tùng M-TP: 'Ai cũng có một thời, ngắn hay dài là do mình' - Duration: 3:48.
For more infomation >> Sơn Tùng M-TP: 'Ai cũng có một thời, ngắn hay dài là do mình' - Duration: 3:48. -------------------------------------------
Hoài Linh thẳng thừng chê Trịnh Thăng Bình và Yến Trang tại "Ơn giời" - Duration: 6:03.
For more infomation >> Hoài Linh thẳng thừng chê Trịnh Thăng Bình và Yến Trang tại "Ơn giời" - Duration: 6:03. -------------------------------------------
2016 Wasn't That Bad - Duration: 9:29.
Hey y'all
So...
Yeah.
Hey y'all, so, sorry for no video last week
I was busy preparing for two family
Christmases and I was just kinda in this messy state.
So... I didn't really have like a festive video planned,
so I just thought, you know, I'd take a week off.
So excuse me for being a bit cheeky.
I'm not really sure if my lighting's good
'cos I'm at my dad's house, but I mean,
location change! Keeping it fresh on my channel.
Now since this video is going up on the first of--
the first day of the new year,
I would firstly like to say, happy new year y'all!
Welcome to 2017.
And secondly, I would like to say that 2016 wasn't that bad.
For me, you know, 2016 was shit, but...
girl
There were still so many good moments for me.
And, for me, I had a choice of
making a video where I rant about all
the bad things that happened this year,
which I'm probably gonna end up making at some point anyway,
or, I make a really positive video.
My friend Claudia made a video about her feelings about 2016,
especially going into 2017.
That kind of summarises what I think of 2016,
so I'll go link her's down below.
I think that it's important to remember all of the
good things that happened this year.
Don't get me wrong, 2016 was tremendously terrible
but I think that there were some good moments in it.
And I want to share some of my good moments from 2016
to...
I don't know, it sounded like a good video idea.
So this is probably one of the happiest if not the happiest
moment for me this year, well in 2016,
and that was going to see Troye Sivan live.
It was a Tuesday and that kind of...
whole week had been like really shitty.
And it wasn't really something that I was planning to go to,
it was more kind of like something which was like very last minute
because, one of my friends, shoutout to you, Sian
you're amazing girl.
One of my friends was like
'Yo, I got two tickets, you wanna have them?'
and I was like, 'oh my God... God bless.'
So I went with Claudia, and it was just an amazing night
that we both shared and that we both experienced,
and everyone in the room felt and experienced,
and it was... I don't know, it's unexplainable.
So another really happy moment of 2016
was when I asked my to-be boyfriend, to be my boyfriend,
and he said yes.
Side note: Girl, he dumped me like a week later
like, whatever
That moment -- it was like, I remember it very clearly,
it was like a Monday... Lunch time?
I was in an English class and we were like messaging like
back and forth, 'cos he lives in the U.S.
And prior to this, we'd been like messaging like non-stop
for like a week.
And this is gonna sound like
really really cliché but, you know
when I asked him, and he said yes,
like, time just like seemed to stop, you know?
I was like, girl, what is this Maui Wowie
that you got me on, like, girl.
But then of course, he, like, dumped me, and stuff,
but I mean, girl.
Like I've kind of come to understand how much
of like a shitty guy he was.
Girl, I cannot deal with that like, girl, just
Bye!
In the words of Titus Andromedon,
Au revoir les felicias
Bye
Another really happy moment for me
wasn't really one that, when I was like
in it and living it and experiencing it
I was like, oh my God, this is so happy.
But one that I look back on fondly...
one that I now look back fondly on...
If that makes any sense.
But it's a memory that makes me happy thinking back on it.
And that was being in my school's production of
"The Tragical History of Dr. Faustus".
Basically it was in a theatre class,
and we all had to choose two areas of stagecraft.
So I chose acting, 'cos, I'm an actor.
And I also chose sound design.
Acting-wise, I played four characters.
I played the Pope, girl I was the gayest pope ever.
A kind of, like... physical embodiment of, like, lust.
Like, the character was called "Lust", and was kind of like a stripper-esque...
Kind of -- girl, I wore fishnets, it was fabulous.
I also played a scholar and a student.
Music-wise, I composed half of the music for the production
and worked with two other super awesome amazing people
to actually, like, make all the sound,
run all the sound, make sure it all worked for the night, etc. etc.
We were basically like a sound team, like, the three of us.
Ooh shit.
But yeah, obviously during -- it was like a few month kind of process,
but especially like those few show nights,
like I think we did a Thursday and a Friday night,
that was really nerve-racking, really stressful.
But looking back on it now,
now that I know that everything worked out well,
I could say that it was one of
the happiest moments -- the happiest experiences of my life.
I really did enjoy working with those people and, I mean
shout out to all of you, and our fabulous teacher, like.
If y'all are watching, girl I love you.
I think I might be giving away my love too easily.
All well.
This is just a side note
and this isn't related anything to anything in this video,
but I've been watching Shadowhunters on Netflix,
it is so fucking good.
It started off like, it was like this
kinda trashy, like, rip-off of like every teen superhero
TV show or film ever,
but it's, like, really developed into this amazing, really good thing.
I really want to read the books that it's based off of.
And oh my God, I am team Malec all the way, like
Malec is like OTP like
I don't think I've ever had a ship that I've wanted so much
since like ever.
Everyone's like, oh, da-da-da and da-da-da,
and I'm like, yeah, okay, I see it, but
M A L E C
is
*orgasms*
Y'all know what I'm talking about, episode 12,
episode 12... Got me in the feels.
Oh my God, I just remembered this other really fun, cheeky moment.
Basically, my friend and I, we went to
this store, this clothing store, where my
other friend works, and they were working there that day,
and basically, my friend and I who had gone there together,
We like -- we like gave a mannequin a make-over,
we like put on new pants for her
like, put on like a top, and oh my God.
We probably embarrassed her so much (the friend that was working there),
but it was so much fun.
And we almost stole, like, a cardboard cut-out,
this giant cardboard cut-out of like this giraffe or something.
But yeah, oh my God,
that was actually so much fun.
I think you get the point of this video, basically...
Obviously, I come from a place of privilege in that
nothing too drastic happened to me this year
I really want to actively try and make a change
and I think that, you know,
this year was -- this year was crap, this year was
fucking terrible, like, fuck mate.
The Aussie bogan's coming out of me, that's how bad it is.
But at the same time, like,
I learned so many things this year
and I experienced so many things this year
I'm finally coming to understand who I am
and I think that it's important to take those things with me into 2017,
I think that we shouldn't just forget 2016 ever happened,
because so many great things did happen this year.
For me at least, 2017 is going to be
a year of fun and happiness,
kindness, and learning and listening
I think most of all, I really want 2017 to be a year of love.
Girl, I'm tearing up.
As everyone else does, I want the world to be
a better place, you know,
I want 2017 to be a great year,
and I'm definitely going to try my fucking hardest,
fuck, try and stop me girl, like
I'm gonna try my fucking hardest to make it
the best year that I possibly can.
And I know life throws a lot of shit in your way,
but I mean, whatever, like.
Girl, what's new?
But anyways, I hope you all have a really happy New Year,
and a happy holidays, a safe holidays.
And I want you to remember to --
*click*
Stay fierce ladies
Bye.
Không có nhận xét nào:
Đăng nhận xét