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1. ### normal adjustment of telescope

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. ### 關於phy力學問題 normal reaction force

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

3. ### is normal reaction and friction related to the repulsion?

...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. ### normal force

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

5. ### normal range of fat%

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. ### normal reaction force 是不是「一定」能抵消物品加在平面上的力，使到物品不會離開平面？)

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

7. ### 什麼是 normal incidence

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

8. ### 電力問題 - 按掣 - normal close/ normal open?????

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. ### 一個wave由淺水去深水...會bend towards normal 定bend away from normal ?

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

10. ### Phy 問題 (F. 4) EASY

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.

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