Krzysztof Halasa wrote:

This is uncertain. If the time is quantified 5 hrs might as well contain
much less quanta than 3 kg, let alone 20 cm :-)

You're forgetting that if time is quantized, it's as part of a general 
quantization of space-time.  Thus, there would be as many quanta in 5 
hrs as in 539,626,442,400,000 cm.

	-hpa