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 2 years ago
A dimensionless quantity
(a) never has a unit, (b) always has a unit,
(c) may have a unit, (d) does not exist.
 2 years ago
A dimensionless quantity (a) never has a unit, (b) always has a unit, (c) may have a unit, (d) does not exist.

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radar
 2 years ago
Best ResponseYou've already chosen the best response.2I had one of those once, and it did not have a unit.

radar
 2 years ago
Best ResponseYou've already chosen the best response.2The unit is Celcius degree @myko

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Can be converted to Fahrenheit units by a sharp student.

myko
 2 years ago
Best ResponseYou've already chosen the best response.0so the answer is (c) may have a unit. Other definition for dimensionless quantity is scalar quantity

rkparth5770
 2 years ago
Best ResponseYou've already chosen the best response.1Yeah But give an example with a unit and without a unit!

myko
 2 years ago
Best ResponseYou've already chosen the best response.0i just did. And @radar gave with no units

myko
 2 years ago
Best ResponseYou've already chosen the best response.0@radar also can convert it to Fahrenheit if you whant

rkparth5770
 2 years ago
Best ResponseYou've already chosen the best response.1I need Examples One is temperature with a UNiT! So without unit?

radar
 2 years ago
Best ResponseYou've already chosen the best response.2In my humble opinion, the best answer would be "a"

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Pi has no unit, just a value and an irrational value at that.

myko
 2 years ago
Best ResponseYou've already chosen the best response.0I desagree: http://en.wikipedia.org/wiki/Dimensionless_quantity

rkparth5770
 2 years ago
Best ResponseYou've already chosen the best response.1So why is it not unitless?

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Plancks constant is just a value, no unit, it is just used to convert things that have a dimehnsion, ft, in. grams, degrees, lbs, etc. these are dimensionsal units.

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Review that link provided by @rkparth5770 and make a decision.

rkparth5770
 2 years ago
Best ResponseYou've already chosen the best response.1What?! i did not provide any

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Thanks @rkparth5770 for providing additional info on this "dimensionless" subject.

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Hmmm... in my physics book, Planck's constant is 6.626...x10^(34) Js , which is with a unit :S

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Just picked that out of the dark @Callisto, didn't realize that Plalnck's constant was in some kind of unit. Should of stuck with Pi lol.

UnkleRhaukus
 2 years ago
Best ResponseYou've already chosen the best response.0in SI units planks constant certainly does have dimensions, , that is why Max Plank devise his own set of units that made it, along with other constants like the gravitational constant and the speed of light dimensionless. i dont like the wording of the options, i would phrase the answer as " a dimensionless quantities has units that cancel out" for example \[\pi=\frac{C[{l}]}{d[l]}=\frac{C[\text{cm}]}{d[\text{cm}]}=\frac{C\cancel{[\text{cm}]}}{d\cancel{[\text{cm}]}}=\frac{C}{d}\]

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Yes indeed Plancks constant does have units. I looked up (Google): Planck's constant = 6.626068 × 10^34 m^2 kg / s Thanks UnkleRhaukus for the review.

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Yes indeed Plancks constant does have units. I looked up (Google): Planck's constant = 6.626068 × 10^34 m^2 kg / s Thanks UnkleRhaukus for the review.

radar
 2 years ago
Best ResponseYou've already chosen the best response.2Yes indeed Plancks constant does have units. I looked up (Google): Planck's constant = 6.626068 × 10^34 m^2 kg / s Thanks UnkleRhaukus for the review.
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