首页 > 58必威网站

初中/中考-物理类问题

来源:
时间:2024-08-17 10:00:48
热度:

初中/中考-物理类问题【专家解说】:(1) P总 = 8P0 = 8 X 1KW = 8KW P电 = UI = 120V X 10A = 1200 W = 1.2KW η =

【专家解说】:(1) P总 = 8P0 = 8 X 1KW = 8KW P电 = UI = 120V X 10A = 1200 W = 1.2KW η = P电 / P总 = 1.2KW / 8KW = 15% (2) ∵ η = P机 / P电 ∴ P机 = η P电 = 75% X 1.2KW = 0.9KW = 900W ∵ P机 = FV ∴ V = P机 / F = 900KW / 150N = 6 m/s
Baidu
map