1. 千瓦時(shí)與焦耳的換算關(guān)系是：1千瓦時(shí)等于3,600,000焦耳，或者3.6百萬焦耳。2. 功率（P）的計(jì)算公式是：P = W / t，其中W代表功（能量），t代表時(shí)間。功率也可以表示為電流（I）和電壓（U）的乘積，即P = UI。3. 電流可以通過歐姆定律U = IR來計(jì)算，其中U是電壓，I是電流，R是電阻。4. 電功（W）的計(jì)算公式適用于任何電路，為W = I × U × t。對于純電阻電路，可以使用W = U2 / R × t的簡化公式。5. 瓦特是功率的國際單位， named after the British scientist James Watt， who made significant contributions to the development of the steam engine. The watt was first adopted by the British Association for the Advancement of Science at its second meeting in 1889 and later, in 1960, was adopted by the 11th meeting of the General Conference on Weights and Measures as an international standard unit for power.6. 人們常用功率單位乘以時(shí)間單位來表示能量，例如1千瓦時(shí)表示一個(gè)功率為1千瓦的設(shè)備在1小時(shí)內(nèi)所消耗的能量，等于3.6 × 10^6焦耳。