Imagine an alternate universe where the value of the Planck constant is $6.62607 \times 10^{-3} \, J \cdot s$.
In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics?
object quantum or classical?
A buckyball with a mass of $1.2 \times 10^{-21} g$, 0.7 nm wide, moving at 39. m/s. classical quantum
A mosquito with a mass of 1.4 mg, 10.9 mm long, moving at 2.6 m/s. classical quantum
An airplane with a mass of $1.24 \times 10^4 kg$, 17.0 m long, moving at 1500. km/h. classical quantum
An eyelash mite with a mass of 14.4 µg, 340 µm wide, moving at 47. µm/s. classical quantum
