- anonymous

Need urgent help, I am stuck on a question: http://snag.gy/jP76g.jpg

- schrodinger

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- amistre64

how are you stuck?

- anonymous

The periods ><. I can see the altitudes.

- amistre64

you can see the periods too, define what a period is

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- amistre64

also, what are you claiming as the altitudes?

- anonymous

time, and somewhat it looks like 4.5 on the first but ....idk

- amistre64

claiming as **amplitudes ...

- anonymous

first one 3, second : 2 right ?

- amistre64

time is one way in which we can measure a period
period is the shortest length required for a single copy of the wave to form.
and 2 is the amplitude of the second, but i disagree with the first.

- amistre64

first one, we have a clear pattern, that has a high point at 0,5,10
second one, we have a clear pattern, that has a high point at what are they?

- amistre64

i believe the first ones amplitude is sloppy. its assuming that half the range is an amplitude, but thats not accurate.

- anonymous

agreed..isn't there a formula to find this the periods..idk

- amistre64

not in all cases, its best as a visual.

- amistre64

do we agree that the pattern repeats, and that it is the same from 0 to 5, as it is from 5 to 10?

- amistre64

what are the intervals in the second one that shows us a repetition of the waves pattern?

- anonymous

Intervals were not given nor was I told to solve for them so have have no clue >< sorry. And I agree.

- amistre64

intervals ARE given, thats right there on the graphs.

- anonymous

Oh my bad, I was thinking you mean shifts

- anonymous

Pi/2, pi, 3pi/2, 2pi, 5pi

- anonymous

*5pi/2

- amistre64

the first one ... it repeats itself in what shortest distance?

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- anonymous

5pi ??

- amistre64

there are no pis in there, but yeah, 0 to 5 is a length of 5
and for the second?

##### 1 Attachment

- amistre64

these are simple only because they start a cycle at 0, sometmes they wont be so nice.

- anonymous

ah okay(I'm just going off that formula for period), and second= pi/2?, and Ik ><

- amistre64

pi/2 is only half way ...
the graph is not 'the same' on the interval 0 to pi.2 as it is from pi/2 to pi
so we CANT have a period of pi/2 becasue the pattern is NOT repeating afterwards.

- anonymous

Oh okay so it would be pi to make it full

- amistre64

yes, it makes a repetition within a period of pi.
if a faucet is dripping once every 3 seconds, whats the period?
if a clown is falling once every 4 minutes, whats the period?
if a dog is barking once every second, whats the period?
if the tides comes in once every 9 hours, whats the period?
a period is the shortest interval it takes for a phenomenea to start repeating itself all over again.

- anonymous

oh okay and 3, 4, 1, 9 ?

- amistre64

trig function have nice formulas, other things do not

- amistre64

lol, yeah those would be the periods of them

- anonymous

Yay I learned Periods and altitudes! Thank you ^^ kindly.

- amistre64

amplitudes ....
so whats our solutions?

- anonymous

lol thx for the correction and 1. a:3 ,p:5 2.a:2, p: pi

- amistre64

your amplitude on the first is mistaken.
-2 to 3 is a distance of 5, and assuming they are going with range/2 ...
5/2 is not 3

- amistre64

so the last option on both seems fair to me

- anonymous

ah, okay Gotcha . Thank you you kindly for teaching me and your patience .

- amistre64

good luck :)

- anonymous

Thx ^^

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