ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


AP Physics 1 Videos 69 videos

AP Physics 1: 3.3 Changes and Conservation Laws
192 Views

AP Physics 1: 3.3 Changes and Conservation Laws. What is the difference in work done?

AP Physics 1: 3.5 Changes and Conservation Laws
177 Views

AP Physics 1: 3.5 Changes and Conservation Laws. Which of the following would increase the rate at which the plate spins?

AP Physics 1: 2.4 Changes and Conservation Laws
172 Views

AP Physics 1: 2.4 Changes and Conservation Laws. Which of the following circuits should the students use?

See All

AP Physics 1: 1.3 Waves 220 Views


Share It!


Description:

AP Physics 1: 1.3 Waves. Find the wave speed.

Language:
English Language

Transcript

00:00

Thank you We sneak And here's your shmoop to use

00:05

your brought to you by traveling waves Of course our

00:08

favorite way to travel waves is by hanging ten on

00:10

a sweet surfboard were goofy footed Well by hanging ten

00:14

we mean ten fingers clutching the board Yeah surfing is

00:17

scary We've seen jaws and we know what's in the

00:19

oceans All right a travelling wave has a period of

00:23

two seconds and amplitude of five millimeters and a wavelength

00:27

of one meter What is its wave speed And here

00:31

the pencil answers All right Okay well here we go

00:36

So we're looking for the velocity of a wave here

00:38

and no we're not talking about saying goodbye after a

00:40

double espresso to find the velocity of a wave we

00:43

multiply the wavelength times the frequency Uh but we don't

00:46

know the frequency yet Minor detail let's strap on our

00:49

math hat because they were about to figure it out

00:52

And people we don't actually have a math hat It's

00:54

more of a beanie rainbow beanie with a propeller Look

00:57

it helps us think ok it's like they're googler All

01:00

right Because frequency and period are reciprocal The equation to

01:03

find the frequency is one over the period In this

01:07

case the period is two seconds so the frequency is

01:10

point five hurts right One over two in california is

01:13

a half yet one too hard Now we can plug

01:15

in the numbers remember way back when we mentioned at

01:18

velocity equals wavelength times frequency Those were the days So

01:23

the wavelength of one meter and a frequency of point

01:25

five hearts our velocity is point five meters per second

01:31

So the correct answer is b yeah we didn't use

01:34

the amplitude even though it was given in the original

01:36

question There's very good reason for that which is that

01:39

it was irrelevant remember do not get hung up on

01:42

using everything in a question just because a question gives

01:44

us a quantity doesn't mean we have to use that

01:46

to get the right answer Sometimes a test will try

01:48

to throw us off our game by giving us too

01:50

much information but our games too strong now for that

01:53

to work on Now that we've reminded ourselves how strong

01:56

we are we're going to go be brave and get

01:58

back in the water on that surfboard We'll just start 00:02:02.1 --> [endTime] with a bathtub Yeah Baby steps people

Related Videos

AP Physics 1: 1.4 Waves
181 Views

AP Physics 1: 1.4 Waves. Which of the following is technically true for Max as he stands at the edge of oblivion? 

AP Physics 1: 1.4 Changes and Conservation Laws
177 Views

AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R2.

AP Physics 1: 2.4 Changes and Conservation Laws
172 Views

AP Physics 1: 2.4 Changes and Conservation Laws. Which of the following circuits should the students use?

AP Physics 1: 1.5 Waves
12 Views

AP Physics 1: 1.5 Waves. What can possibly occur when the two waves reach each other?

AP Physics 1: 2.2 Waves
19 Views

AP Physics 1: 2.2 Waves. What's the wavelength of this standing wave?