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AP Physics 2 Videos 59 videos

AP Physics 2: 1.5 Systems Interactions and Changes
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AP Physics 1.5 Systems Interactions and Changes. Which of the following statements is true?

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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?

Language:
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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

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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