convert cm/dyne to um/mN

pfcs49 · 9th May 2009, 10:43 PM

Posted: 09 May 2009 22:05 Post subject: objective comparison: cm/dyne to um/mN in actual values/conv

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I am wanting to compute arm resonances for various carts/arm combos.
The cartridge database (www.cartridgedb.com) works only w/cm/dyne.
One cart is 28um/mN, another 30. People say go by tracking force; my Yamaha MC705 calls for 1.7g, but has a compliance of 6.0x10(-6)cm/dyne, a very low compliance, whereas my B&O MMC1 is 1g/very high compliance. Sure would help to have empirical data and plug it into the calculator

Mark Kelly · 10th May 2009, 01:02 AM

1 dyne = 1 g.cm.s^-2

therefore 1 cm / dyne = 1 g ^-1.s^2 = 10^-3 kg^-1.s^2

1 um = 10^-6m

1 mN= 10^-3 kg.m.s^-2

therefore 1 um / mN = 10^-3 kg^-1.s^2

the two units are thus identical.

Nanook · 10th May 2009, 01:16 AM

look here
an online conversion page for almost any units. Handy to bookmark.

also are those weights quoted or mass? If grams-force then weight (mass X force of gravity), easy enough to convert into a mass...

stew

Mark Kelly · 10th May 2009, 08:59 AM

I stuffed up the 10^-3s in my post

it should read:

1 cm / dyne = 1 g ^-1.s^2 = 10^3 kg^-1.s^2

thus 10^-6 cm/ dyne = 10^-3 kg^-1.s^2

1 um = 10^-6m

1 mN= 10^-3 kg.m.s^-2

therefore 1 um / mN = 10^-3 kg^-1.s^2

the two units are thus identical.

9th May 2009, 10:43 PM	#1
pfcs49 diyAudio Member Join Date: Nov 2007	convert cm/dyne to um/mN Posted: 09 May 2009 22:05 Post subject: objective comparison: cm/dyne to um/mN in actual values/conv -------------------------------------------------------------------------------- I am wanting to compute arm resonances for various carts/arm combos. The cartridge database (www.cartridgedb.com) works only w/cm/dyne. One cart is 28um/mN, another 30. People say go by tracking force; my Yamaha MC705 calls for 1.7g, but has a compliance of 6.0x10(-6)cm/dyne, a very low compliance, whereas my B&O MMC1 is 1g/very high compliance. Sure would help to have empirical data and plug it into the calculator

10th May 2009, 01:16 AM	#3
Nanook diyAudio Member Join Date: Feb 2004 Location: Chinook Country.Alberta	pfcs49, a calculator (online) look here an online conversion page for almost any units. Handy to bookmark. also are those weights quoted or mass? If grams-force then weight (mass X force of gravity), easy enough to convert into a mass... stew __________________ stew ☮ -"watch out where the Huskies go and don't you eat that yellow snow"--Nanook died of starvation 8 mos after the movie was made

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10th May 2009, 01:02 AM	#2
Mark Kelly diyAudio Member Join Date: Feb 2006 Location: Geelong	1 dyne = 1 g.cm.s^-2 therefore 1 cm / dyne = 1 g ^-1.s^2 = 10^-3 kg^-1.s^2 1 um = 10^-6m 1 mN= 10^-3 kg.m.s^-2 therefore 1 um / mN = 10^-3 kg^-1.s^2 the two units are thus identical.

10th May 2009, 08:59 AM	#4
Mark Kelly diyAudio Member Join Date: Feb 2006 Location: Geelong	I stuffed up the 10^-3s in my post it should read: 1 cm / dyne = 1 g ^-1.s^2 = 10^3 kg^-1.s^2 thus 10^-6 cm/ dyne = 10^-3 kg^-1.s^2 1 um = 10^-6m 1 mN= 10^-3 kg.m.s^-2 therefore 1 um / mN = 10^-3 kg^-1.s^2 the two units are thus identical.

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