✔ 最佳答案
actually,
average KE= (total KE)/(amount of matter)
simlilarly,
average speed=(total distance)/(time)
(3) correct.
Heat is defined as the thermal energy transferrd due to temperature difference of two bodies.
So the direction of heat flow depends on temperature.
you are correct for: temperature is a measure of avg KE
but temperature is also responsible for deciding the direction of heat flow
another example:
density is the measure of amount ot matter per unit volume
desity is a property that decide the buoyancy
2008-03-11 15:27:26 補充：
two is correct
you said temperature is the measure of average KE
however if you don't measure the total KE, how can you deduce the avg KE?
2008-03-11 15:27:30 補充：
it's a problem about statistics
any change in the total value/mean value would in turn change another one
i.e. mean value and total value are interrelated
please don't stick to the wordings, tune you mind about maths
