One reason for this disparity is the difference between perceived and derived dimensional units. Lengths are directly perceived; we can see the difference between 1cm and 1m. On the other hand, energy is not directly perceived; we cannot visually detect 1J and 1000 J. Energy is a derived unit of directly perceived units. We might observe a displacement, feel a force moving through that displacement, and take these two perceptions together to “feel” what a change in energy is, but this process involves the simultaneous sensing of two perceived units and mentally combining the two. Generally this aggregation is difficult to realize.
One reason for this disparity is the difference between perceived and derived dimensional units。 Lengths are directly perceived; we can see the difference between 1cm and 1m。 On the other hand, energy is not directly perceived; we cannot visually detect 1J and 1000 J。 Energy is a derived unit ...全部
One reason for this disparity is the difference between perceived and derived dimensional units。
Lengths are directly perceived; we can see the difference between 1cm and 1m。 On the other hand, energy is not directly perceived; we cannot visually detect 1J and 1000 J。
Energy is a derived unit of directly perceived units。 We might observe a displacement, feel a force moving through that displacement, and take these two perceptions together to “feel” what a change in energy is, but this process involves the simultaneous sensing of two perceived units and mentally combining the two。
Generally this aggregation is difficult to realize。
产生差异的一个原因就是感知到的空间单位和推理得到的空间单位的不同。我们可以直接感觉到长度这个概念，我们可以看出1厘米和1米的差异。
另一方面，能量并不是可以直接感觉得到的。我们不能从视觉方面发现1焦耳和1000焦耳的差别。能量是一个通过直接感知经过推导而得来的单位。我们可以观察得到位移、感觉得到位移所产生的力量的移动，以及把这两种感知合在一起来“感觉”什么是能量的变化。
但是这个过程同时包含着对两种感知单位的意识以及从精神上把二者结合在一起。总体来说，这种结合是很难实现的。
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