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關於熱功當量的測定,不論在高中或初中的課本上(見人民出版社的高中物理或初中物理)都是用焦耳實驗的裝置來說明,但在教學中則不如通過實際實驗來證明好些。可是若裝備像焦耳實驗那樣的儀器是比較困難的,而且也不容易做得準確。現在研究了一種簡易的測定方法,說明如下: 器材及裝置取一支長約1米的玻璃管,內徑可在2厘米左右,兩端塞以橡皮塞,其中裝滿冷水及適量的小鋼珠(可用自行車上最小的鋼珠或自做的鉛粒),再在玻璃管外面套以與其等長而較粗
The measurement of the amount of thermal power, both in high school or junior high school textbooks (see People’s Press high school physics or junior high school physics) are used Joule experimental device to illustrate, but in teaching is not as good as through practical experiments to prove better. However, it is difficult to equip an instrument like a Joule experiment, and it is not easy to do it accurately. We now study a simple method of determination, described as follows: Equipment and devices Take a glass tube about 1 meter long, the inner diameter of about 2 cm, plug the ends of a rubber stopper, which filled with cold water and the amount of small steel ball (Available on the bike of the smallest steel ball or self-made lead particles), and then set in the glass tube to its length and thicker