Shifts in Equilibrium - By MITK12Videos
Transcript
| 00:12 | equilibrium is a balanced state that stays balanced unless something | |
| 00:16 | knocks it out of balance . Mhm . Sometimes it's | |
| 00:22 | pretty clear that you're watching a movie in reverse , | |
| 00:29 | but we can tell now that time is back to | |
| 00:31 | normal driving systems into equilibrium equilibrium comes from latin words | |
| 00:36 | for equal and balance at equilibrium , opposing forces are | |
| 00:40 | equal , balance each other out and guarantee that these | |
| 00:43 | balls will stay where they are almost anywhere . I | |
| 00:46 | throw the balls , they settle into this one lowest | |
| 00:48 | valley and they won't escape the valley , gravity is | |
| 00:51 | pulling them down to the point with the lowest potential | |
| 00:54 | energy . At high points , they will have high | |
| 00:56 | potential energy from gravity and will use this energy to | |
| 00:59 | move towards the lower energy valleys . It's the lowest | |
| 01:02 | valley , but it's not the only place . The | |
| 01:04 | balls might settle . Some balls never make it to | |
| 01:07 | the lowest point . Instead they settle in a different | |
| 01:11 | valley in this corner . What's so special about these | |
| 01:14 | places , Each of these valleys is a stable equilibrium | |
| 01:19 | . Now , all attempts to change with the balls | |
| 01:21 | land , I'll shift the landscape which will change the | |
| 01:24 | delivery . Um There's a new lowest point and the | |
| 01:27 | old lowest point is one of the highest points . | |
| 01:29 | Now in this new configuration , they settle in a | |
| 01:32 | different equilibrium . I've successfully shifted where the equilibrium lies | |
| 01:37 | . This type of equilibrium , where nothing moves is | |
| 01:40 | a static equilibrium . All the parts of the system | |
| 01:43 | are motionless , static and the forces are balanced in | |
| 01:46 | equilibrium . But sometimes even when opposing forces balance each | |
| 01:51 | other , small parts of the system still move in | |
| 01:54 | dynamic equilibrium . The state of the system is the | |
| 01:57 | average of its parts . The average state can stay | |
| 02:00 | the same . Even if small parts change . For | |
| 02:04 | example , an individual coin can either be up and | |
| 02:07 | spinning or down . The state of the system is | |
| 02:12 | how many coins are up . I can spin coins | |
| 02:16 | so that three coins are spinning at once as soon | |
| 02:18 | as I spin up another one friction knocks down one | |
| 02:21 | of the ones that was already spinning . So even | |
| 02:24 | though individual coins are changing from spinning to not spinning | |
| 02:28 | or from not spinning to spinning the overall state of | |
| 02:32 | the system , How many coins are up ? three | |
| 02:36 | stays the same , that's why we call it equilibrium | |
| 02:40 | . How do I shift this kind of equilibrium ? | |
| 02:42 | I can either change the rate that the table slows | |
| 02:45 | them down or change the rate that I spend them | |
| 02:47 | up . I enlisted my sister's help because together we | |
| 02:50 | can spin coins up at a faster rate than me | |
| 02:52 | alone turns out that together we can spend fast enough | |
| 02:56 | for a dynamic equilibrium of about five coins up at | |
| 02:59 | a time we've successfully shifted the equilibrium of the system | |
| 03:03 | . So how is this actually working ? My sister | |
| 03:06 | Claire and I can spin coins up faster than I | |
| 03:09 | could alone . To balance this friction needs to knock | |
| 03:14 | coins down faster too . This happens when friction has | |
| 03:18 | more spinning coins on the table to knock down . | |
| 03:21 | So the new equilibrium happens when there are five coins | |
| 03:25 | up and the rest are down At five coins up | |
| 03:29 | , Clara and I can spin up a coin at | |
| 03:32 | the same rate that it takes friction To knock one | |
| 03:35 | down . So we're left at a stable dynamic equilibrium | |
| 03:39 | of five coins up as time runs forward were driven | |
| 03:44 | towards equilibrium where opposing forces are balanced and opposing rates | |
| 03:49 | are equal , but we can shift where the equilibrium | |
| 03:51 | lie either by adjusting the rates at which individual objects | |
| 03:55 | which state , or by changing the landscape . |
Summarizer
DESCRIPTION:
OVERVIEW:
Shifts in Equilibrium is a free educational video by MITK12Videos.
This page not only allows students and teachers view Shifts in Equilibrium videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.
GRADES:
STANDARDS:
