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### Units for v(frequency)

Posted: **Thu Oct 11, 2018 2:37 pm**

by **Madeera_Mian_3B**

Was doing the homework and noticed that for some of the problems they would use s^-1, while in others they would use Hz. Does it matter what units we use for frequency? or should they match with the rest of the calculations by using s^-1.

### Re: Units for v(frequency)

Posted: **Thu Oct 11, 2018 2:46 pm**

by **Deepika Pugalenthi 1A**

s^-1 and Hz can be uses interchangeably because they are the same thing. Usually, in problems it is given in Hz so I would recommend using Hz instead of s^-1.

### Re: Units for v(frequency)

Posted: **Thu Oct 11, 2018 4:02 pm**

by **Henry Krasner 1C**

Yes, Hz and s^(-1) can be used interchangeably. That is why in the formula c=λv for instance, that the unit of m for wavelength and Hz or s^-1 for frequency combine to create c, which is 3.00 x 10^8 m.s^-1

### Re: Units for v(frequency)

Posted: **Thu Oct 11, 2018 11:38 pm**

by **Sana_Mian_3G**

They can both be used, but I would check the what the problem is asking for and the units that are needed.

### Re: Units for v(frequency)

Posted: **Thu Oct 11, 2018 11:50 pm**

by **MadisonB**

They can both be used (and are basically the same thing), but make sure that all units cancel when you reach the end of the problem.

### Re: Units for v(frequency)

Posted: **Thu Oct 11, 2018 11:54 pm**

by **g orloff 1J**

the units are Hz and s^(-1)

### Re: Units for v(frequency)

Posted: **Fri Oct 12, 2018 12:44 am**

by **Archana Biju 1G**

Hz and s^-1 can be used interchangeably but I think s^-1 is best when used in equations and Hz is best to state your final answer.

### Re: Units for v(frequency)

Posted: **Sat Oct 13, 2018 11:39 am**

by **Sean Reyes 1J**

Hertz (Hz) and s^-1 are the same thing.

1 Hz = 1 s^-1

### Re: Units for v(frequency)

Posted: **Sat Oct 13, 2018 11:41 am**

by **Sean Reyes 1J**

Also, depending on what the question calls for, use the corresponding units.

So if the question asks for an answer in Hertz, obviously just use Hertz. But for equations, they use s^-1, implying that s^-1 is usually meant more for calculations.

### Re: Units for v(frequency)

Posted: **Sat Oct 13, 2018 12:39 pm**

by **Karishma_1G**

Hertz and s^-1 can be used interchangeably. Hertz is the unit for frequency which can be written and thought of as cycles/second. Thus Hertz and 1/second are the same.

### Re: Units for v(frequency)

Posted: **Sat Oct 13, 2018 1:24 pm**

by **ArielKim3C**

Hz and s^(-1) are used interchangeably but it may be easier to use s^(-1) during calculations just to ensure that all the units cancel out by the end. The final answer would most likely then be stated using Hz.

### Re: Units for v(frequency)

Posted: **Sat Oct 13, 2018 3:14 pm**

by **Ricardo Martin 1J**

Hz and s^-1 are interchangeable because they are equivalent. I see Hz used more often than s^-1, but I doubt that you will be marked wrong for using one or the other.