Practice portal › Units and Measurements › Units, Conversions and Astronomical Distances
Asked in GUJCET 2024 · Units and conversions
Given: the unit J s.
Idea: expand it in base units. J=N m=kg m² s⁻², so J s=kg m² s⁻¹.
That is (mass)×(length)×(length per unit time) -- exactly the combination mvr.
mvr is the angular momentum of a particle, so angular momentum is measured in J s.
Planck's constant has the same unit, which is why Bohr's condition can be written mvr=(nh)/(2π): h and angular momentum are quantities of the same kind.
So J s is the unit of angular momentum.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer