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
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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
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.
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.
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.
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.
1 dyne/cm = 0.000001 millinewton/micrometer
This is the correct place for dyne /centimeter to millinewton / micrometer force conversions
Convert 14 Dyne/Centimeter to Millinewton/Micrometer
This is the correct place for dyne /centimeter to millinewton / micrometer force conversions
Convert 14 Dyne/Centimeter to Millinewton/Micrometer
BTW that's not SI, you are only allowed one multiplier (excluding the annoying kg exception), so that should be 28mm/N - SI is pretty strict about syntax to avoid ambiguity and multiple representations of the same thing(*)
You can read up on this here - well worth it if you are new to or unsure about SI
International System of Units - Wikipedia
BTW the dyne is not SI, its from the cgs system which is all but obsolete (textbooks tend to prolong the death-throes of such things)
(*) Don't get me started on the crazy baroque imperialisms like torque being measured in both inch-ounces and foot-pounds 🙂