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1. ### position and movement

(a) Distance covered by satellite in one revolution round the earth = 2 x pi x (350+6370) km where pi = 3.14159..... Hence, average speed = distance/time = 2 x pi x (350+6370) /1.5 km/h (b) Similar, distance covered by satellite in one revolution = 2 x pi x (h+ 6370) km where h (in km) is the...

當有一大串形容詞放埋一齊時，習慣上係有固定次序o既，點解要咁就真係考起，但你要講英文，就只能夠跟從呢個習慣。 根據 Michael Swan 著，Practical English Usage (p11, Oxford 2005)，次序為： Size > Age >...

分類：社會及文化 > 語言 2007年08月25日

3. ### position and movement

Answer : E 任何物件於地球表面，都受到gravitational force (g) ge 影響。Gravitation force會向住地心 (earth core) 拉住件物件。 而你亦都應該學左 Gravitation force = mg 所有物件都有一個Gravitation force (mg) 向下拉 如果該物件係置於地面上...

4. ### position and movement

You have some information missing. How much does its velocity decrease? As far as I remember this question, the velocity should decrease from 30 m/s to 20 m/s in 100 m. So, I will use this to do the question. Initial velocity, u = 30 m/s Final...

5. ### java : 點樣可以係條string度搵返哂所有substring 既 position ????

Use indexOf(String str, int fromIndex) method of the String class. It returns the index of the first occurrence of the substring within the searched string, starting from the specified index. i = myString...

6. ### position and movement

Time needed for reaching the MAXIMUM velocity : u=0, v=10ms^-1, a=3.3ms^-2, By v=u+at,10=0+3.3t t=10/3.3 s distance of the runner&#039;s velocity change from 0 to 10ms^-1 : By v^2-u^2=2aS, 10^2-0=2(3.3)S S=100/6...

7. ### Position and Movement Question

A man standing in a stationary lift releases a stone. The stone takes t seconds to reach the floor of the lift. If the lift is moving downwards with constant velocity instead of being stationary A.The stone...

8. ### physics (movement and position )

friction compensated = 冇 friction 呢個net force. 因為如果你係平面推架車仔, 佢會有個friction 阻住你, 令你冇咁易推(net force 小左). or 你推完個friction 會整停佢. 但個斜路 佢係有個force 向下, 係mgsinx 咁當佢呢個mgsinx 同個木版gei friction 一樣, 咁佢就冇net force , 咁就好似冇左 令佢減速gei...

9. ### CE Physics - Position &Movement

A car travels from town A to town B. It first moves at a speed of 60km/h for 20 minutes and then at 80km/h for the rest of time. What is the car’s average speed if the distance between town A and town B is 60km...

10. ### Position and Movement Question 1

S(t) = ut + 0.5at^2 where S(t) is a function of t and equal to distance (in metre) travelled after t seconds with given initial speed of u and acceleration of a for this question, u = 20ms-1 and a = -1.5ms-2 (deceleration) After 3 seconds, the distance...