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  1. normal 相關
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  1. For a telescope, the focus of the objective and the eyepiece must be coincidence, that means at the same point. Therefore the separation between them: 50+10 = 60cm so that is is at normal adjustment

  2. ... weight (F2 = -mg) on the ground, F2 = F1 = mg (3) normal reaction force acting to the body by the ground, F3 = -F2...

  3. ...我地都係受電子既repulsion. 點解有地心吸力, 我地又唔會吸到去地底? 因為有 normal reaction. normal reaction又點泥架? 咪係我地腳個d 電子, 同地下個d 電子 既repulsion...

  4. Certainly, there is. In the absence of a normal force, how come the car could be moving horizontally?

  5. BMI = w / (h x h) 舉個例,例如你既體重係70KG,身高係1.7M.咁你既BMI就係,70/(1.7*1.7)=24 對番下面個表姐係理想體重,但係都接近超重. 成人的BMI數值 一般體重: 女性/男性 (BMI 18.5到24.9之間) 理想體重: 女性 (22), 男性 (24) 超重: 女性/男性...

  6. There is something wrong in your question. The [ normal reaction] force and the [force acting on a plane] are froces that...

  7. " Normal incidence" means the incident ray is perpendicular to the incident surface. In other words, the angle of incidence is zero degree.

  8. 當你需要量度NC或NO,在萬用表是用R檔,由×1至×10K都可以。索制接駁法,是視乎你的需要。舉例如下:每個索制都有一對連接線圈用的接口,該對線是視乎你的索制需要那種電源,就當是用市電吧!索制控制線圈,一極接火線,一極接零線,為達至控制該...

  9. ...from optically less dense medium to optically denser medium,it bends towards normal

  10. normal force 即係指一個同該物件的重力一樣但方向相反卻又不是重力的reaction force的力.

  1. normal 相關
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