Question

The period of a wave:


a. decreases with increasing frequency.
b. increases with increasing frequency.
c. increases with decreasing wavelength.
d. a and c only.
none of the above.

Answer 1

\[T = \frac{ 1 }{ f }\] what can we say about this formula (period)?

Answer 2

That whichever number is below the 1 in the fraction is going to be the number itself?

Answer 3

Plug in some large and small numbers and see what happens and relate it to your options.

Answer 4

That whichever number is below the 1 in the fraction is going to be the number itself?

Answer 5

\[f = \frac{ v }{ \lambda }\]

Answer 6

I don't know what you mean, can you elaborate, I don't see how it has to do with your question?

Answer 7

You asked what could I tell you about the first equation.

Answer 8

\[T = \frac{ 1 }{ 10000000 }\] what happens if the frequency is that high, will the period decrease or increase?

Answer 9

decrease.

Answer 10

Yes, now if we have \[T = \frac{ 1 }{ 0.000000001 }\]

Answer 11

Then we have a frequency that goes higher.

Answer 12

Exactly!

Answer 13

*increases

Answer 14

The answer is D

Answer 15

A & C

Answer 16

oops no. A

Answer 17

Now if we plug \[\huge T = \frac{ 1 }{ \frac{ v }{ \lambda } } \implies \frac{ \lambda }{ v }\] what happens?

Answer 18

Im lost with everything passed T = 1

Answer 19

First time in physics ....

Answer 20

I know wavelength symbol.

Answer 21

Well lets say the speed is constant, \[T = \frac{ \lambda }{ c }\] now if the period increases will the wavelength decrease or increase (the upside down y called lambda is the wavelength).

Answer 22

Right

Answer 23

All of these formulas are related so it's kind of neat you can rearrange them to find relations between them.

Answer 24

indeed

Answer 25

So it's not c, if the period increases the wavelength will as well

Answer 26

That means the only answer will be? :)

Answer 27

I had come back and say A

Answer 28

Right A, seems best to me as well :)

Answer 29

said*

Answer 30

Yes, I know but we had to go through all the options to make sure.

Answer 31

Which produces a period of 0.1 seconds?


a. a wave with a frequency of 5 Hz
b. a wave with a wavelength of 7 m
c. a wave with a frequency of 10 Hz
d. a wave with a speed of 5 m/s

Answer 32

Use the formula I provided earlier, \[T = \frac{ 1 }{ f }\]

Answer 33

Well that means the answer can only be either a or c ha.

Answer 34

and \[T = \frac{ \lambda }{ v }\]

Answer 35

No don't just assume that because I did not give you all the formulas

Answer 36

Try it yourself

Answer 37

T=1/10.

T= 0.1. The answer is C.

Answer 38

Looks good

Answer 39

The frequency of a wave:


a. increases with increasing period.
b. decreases with increasing period.
c. increases with increasing wavelength.
d. a and c only.

Answer 40

I am thinking d.

Answer 41

Because frequency goes up and down.

Answer 42

We're just going backwards from your first question here, do the same thing plug in some numbers

Answer 43

\[T = \frac{ 1 }{ f } \implies f = \frac{ 1 }{ T }\]

Answer 44

A

Answer 45

The number change up when plugging in the digits was pretty cool to see.

Answer 46

Are you sure? Would frequency increase if period increases? \[f = \frac{ 1 }{ T } = \frac{ 1 }{ 100000000 }\]

Answer 47

Oh. Frequency decreases with the increased period. That earlier question had me a little confused.

Answer 48

So, B.

Answer 49

Yeah :)

Answer 50

The period of a vibrating object is halved if its frequency:

a. triples.
b. increases by one and a half times.
c. increases by three and a half times.
d. quadruples.
e. doubles.

Answer 51

Doubles