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

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

radarBest ResponseYou've already chosen the best response.2
The unit is Celcius degree @myko
 one year ago

radarBest ResponseYou've already chosen the best response.2
Can be converted to Fahrenheit units by a sharp student.
 one year ago

mykoBest ResponseYou've already chosen the best response.0
so the answer is (c) may have a unit. Other definition for dimensionless quantity is scalar quantity
 one year ago

rkparth5770Best ResponseYou've already chosen the best response.1
Yeah But give an example with a unit and without a unit!
 one year ago

mykoBest ResponseYou've already chosen the best response.0
i just did. And @radar gave with no units
 one year ago

mykoBest ResponseYou've already chosen the best response.0
@radar also can convert it to Fahrenheit if you whant
 one year ago

rkparth5770Best ResponseYou've already chosen the best response.1
I need Examples One is temperature with a UNiT! So without unit?
 one year ago

radarBest ResponseYou've already chosen the best response.2
In my humble opinion, the best answer would be "a"
 one year ago

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

mykoBest ResponseYou've already chosen the best response.0
I desagree: http://en.wikipedia.org/wiki/Dimensionless_quantity
 one year ago

rkparth5770Best ResponseYou've already chosen the best response.1
So why is it not unitless?
 one year ago

radarBest ResponseYou've already chosen the best response.2
Plancks 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.
 one year ago

radarBest ResponseYou've already chosen the best response.2
Review that link provided by @rkparth5770 and make a decision.
 one year ago

rkparth5770Best ResponseYou've already chosen the best response.1
What?! i did not provide any
 one year ago

radarBest ResponseYou've already chosen the best response.2
Thanks @rkparth5770 for providing additional info on this "dimensionless" subject.
 one year ago

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

radarBest ResponseYou've already chosen the best response.2
Just 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.
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
in 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 \[\pi=\frac{C[{l}]}{d[l]}=\frac{C[\text{cm}]}{d[\text{cm}]}=\frac{C\cancel{[\text{cm}]}}{d\cancel{[\text{cm}]}}=\frac{C}{d}\]
 one year ago

radarBest ResponseYou've already chosen the best response.2
Yes 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.
 one year ago

radarBest ResponseYou've already chosen the best response.2
Yes 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.
 one year ago

radarBest ResponseYou've already chosen the best response.2
Yes 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.
 one year ago
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