Hz = J  [ENDORSED]

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Ashley Johnson 2G
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Hz = J

Postby Ashley Johnson 2G » Mon Oct 11, 2021 6:38 pm

Does 1 HZ = 1 J?

Sila_Sozeri_1C
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Re: Hz = J

Postby Sila_Sozeri_1C » Mon Oct 11, 2021 7:00 pm

Hi! A Joule is the unit of energy and Hertz is the unit for frequency. The relationship between them is not necessarily the relationship you indicated; Energy is equal to Planck's constant multiplied by frequency.

I hope this helped!

Joanna Zhao 1J
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Re: Hz = J

Postby Joanna Zhao 1J » Mon Oct 11, 2021 8:09 pm

No, Hz measures frequency; an alternate way to write the unit Hz is seconds^(-1). Joules measures energy and its SI units are kg*meters^2*seconds^(-2).

Rhea Desai 1A
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Re: Hz = J  [ENDORSED]

Postby Rhea Desai 1A » Mon Oct 11, 2021 8:14 pm

1 Hz can also be thought of as 1 cycle per second, which we write as s^-1. A joule is kg*m^2/s^2. This can be confusing because when we use the equation E = hv, h has units J * s and frequency has units 1/s. This cancels out to leave just joules which is the units for energy.

Ashley Johnson 2G
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Re: Hz = J

Postby Ashley Johnson 2G » Mon Oct 18, 2021 2:40 pm

Rhea Desai 1D wrote:1 Hz can also be thought of as 1 cycle per second, which we write as s^-1. A joule is kg*m^2/s^2. This can be confusing because when we use the equation E = hv, h has units J * s and frequency has units 1/s. This cancels out to leave just joules which is the units for energy.

This helped a lot thank you so much! So frequency always has a unit of Hz?

raynebunado
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Joined: Fri Sep 24, 2021 6:58 am

Re: Hz = J

Postby raynebunado » Mon Oct 18, 2021 3:19 pm

Hz is actually equal to s^-1 and used for frequency! One J is actually equal to kg.m^2.s^-2 via our EQ sheet provided by Dr. Lavelle!

bree_wray_14a
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Re: Hz = J

Postby bree_wray_14a » Thu Oct 21, 2021 9:02 pm

Hi, 1 Hz = 1 s^-1

and

1 J = kg * m^2 * s^-2

Reece Fong 2k
Posts: 105
Joined: Fri Sep 24, 2021 6:21 am

Re: Hz = J

Postby Reece Fong 2k » Thu Oct 21, 2021 10:16 pm

No. Hz is in units of 1/s while J is in units of kg m^2/s^2

Lawrence Javelo Disc 3B
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Re: Hz = J

Postby Lawrence Javelo Disc 3B » Thu Oct 21, 2021 10:58 pm

A Hz is a unit of frequency. A Hz is s^-1. A J is a Joule and is the standard unit for Energy. They are not the same thing, but you can go from Hz to J by using the equation E=hv.

Nick Oscarson 1K
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Joined: Fri Sep 24, 2021 6:28 am

Re: Hz = J

Postby Nick Oscarson 1K » Sat Oct 23, 2021 9:09 pm

1 Hz is not equal to 1 Joule because they are not SI units of the same thing. Hz measures frequency, whereas J measures energy.


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