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AP Physics 2: 1.5 Systems Interactions and Changes 4 Views
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Description:
AP Physics 1.5 Systems Interactions and Changes. Which of the following statements is true?
Transcript
- 00:03
And here's your shmoop du jour brought to you by static
- 00:06
electricity causing pain to feet shufflers around the world..The thousand [man stubs little toe on bed and screams]
- 00:11
foot tall Sky Tower in New Zealand has a glass floor with a clear view of the
- 00:15
ground below Kate walks across the glass floor in rubber soled shoes causing [Kate walking across glass floor]
- 00:21
static charge to build up on the shoes and floor the site makes Kate a little
Full Transcript
- 00:25
dizzy and she reaches for the metal frame for support shocking herself with [Kate touches metal frame and shocks herself]
- 00:30
static electricity..Which of the following statements is true select two
- 00:33
answers and here are our options.. Okay well terrifying heights and electric shocks [Man hanging on to skyscraper and is electrocuted]
- 00:39
this is not our idea of fun at a tourist attraction.. If we ever visit New Zealand and
- 00:44
we'll just stick to hanging out with the hobbits.. Just in case high time scary [Hobbit being photographed by people]
- 00:48
enough though another fun feature about tall buildings is that they get struck
- 00:51
by lightning that happens a lot with tall things after all which is why our [man struck by lightning on a mountain]
- 00:56
friend stretch doesn't go mountain climbing anymore. Though architects
- 01:00
need to protect people in their buildings from getting zapped...One way they do that is [Man insulating a loft]
- 01:04
by keeping the building insulated against electricity well glass is a
- 01:09
great electric insulator and rubber is too so one of our correct answers is A..
- 01:13
Another way they protect against lightning bolts is by providing the [Lightning strikes the Thousand Foot skyscraper in New Zealand]
- 01:17
electricity a way to get down to the ground safely if it hits the building
- 01:20
that can be done with a lightning rod which is attached to wires running down [Lightning travelling down the rod to the ground]
- 01:24
to the ground allowing the electricity to pass through the outside of the
- 01:28
structure after all lightning happens when rain clouds generate an electric
- 01:32
charge by running into each other just like with Kate walking in the Sky [Clouds hitting each other and Kate walking over the Sky Tower]
- 01:36
Tower.. The negative charge in the cloud seeks a balance and this happens when an
- 01:40
electricity is discharged to the ground that huge burst of charge helps bring
- 01:44
the clouds charge closer to neutral well that's what happens with Kate she builds
- 01:50
up a negative charge and by touching the metal frame of the building the [Kate with a negative charge touching the metal frame]
- 01:53
electrons jump off of her bringing her charge back to neutral and the static
- 01:58
electricity runs down the support to the ground which means C is our other
- 02:02
correct answer and that also means that D is wrong she's getting back to a
- 02:05
neutral charge not gaining a negative charge
- 02:08
and B is wrong because there's no such thing as a charge of 3.5 e.. E is the
- 02:13
elementary charge which means that it can't get any smaller 3.58e isn't [Two students holding the letter E]
- 02:17
possible and a possible answer well yeah that's definitely wrong so be careful
- 02:21
next time you go walking on a glass floor and if you do happen to pick up
- 02:24
static electricity make sure to zap a friend or family member it's just more [Kate touches her friend to give off static electricity]
- 02:28
fun to share the pain.
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