能量、功率与时间
传递的能量等于功率乘以时间。
E = P × t计算示例
1 000 W ; 3 600 s → 3.6 MJ
公式说明什么
传递的能量等于功率乘以时间。
注意单位
计算前请使用相互兼容的单位。
核心概念
Take one idea at a time. If a new word appears, connect it to a concrete object, number or experiment before moving on.
Say the idea aloud in your own words, then test it with a simple example.
能量守恒
Memorising a sentence is not the same as understanding the mechanism behind it.
数值示例
P = 2.0 kW; t = 3.0 h
代入数值: E = 2.0 × 3.0 = 6.0 kWh
检查: E = P × t
练习
解答: P = 2.0 kW; t = 3.0 h →
E = 2.0 × 3.0 = 6.0 kWh. E = P × t