# Yahoo奇摩 網頁搜尋

1. ### Help me do please?

b) 154/0.77=200This is "quick" calculation .  Ha!Checking: using the calculated original total 200，if you're correct 77% lift = 154 stated in the question:200 x 77% = 154 So 200 is correct.

分類：社會及文化 > 語言 2020年07月30日

2. ### mobile phones should be used in school for studies(debate)(agree)(in point)pls?

...information (from Yahoo/Google) - use the "calculator" function for calculations during lessons => save the trouble of bringing a calculator to school...

分類：社會及文化 > 語言 2018年04月15日

...for DL081797 for pointing out my mistake in my original calculation . It has been corrected now ]. (c) Equivalent...

分類：科學及數學 > 物理學 2017年09月23日

4. ### Find the time for a wave to travel from one end to the other end of the string.?

Your calculation seems correct. The right hand side of the equation is the wave velocity expressed in m/s (metres per second). Hence, the time t is in unit of "second"

分類：科學及數學 > 物理學 2017年04月14日

... into vertical and horizontal components. This makes the calculation even more clumsy. Since N1 is already perpendicular to AB...

分類：科學及數學 > 物理學 2017年03月24日

... that you should use the actual current as the denominator in the percentage error calculation , as we want to find how much the measured current deviates from the...

分類：科學及數學 > 物理學 2017年03月23日

7. ### Please check my calculation . Very confused. Gravitation.?

Your first equation is already wrong. Be aware that W and N are not exactly in opposite directions. The earth attractive force W on an object (of mass m, say) is directed towards the centre of the earth (i.e. along the radius...

分類：科學及數學 > 物理學 2016年12月27日

...out not to be zero. Should you include the centrifugal force into your calculation , the equation would become, Net moment = 2d(N2) -[mgd + m(v^2)h/r] = [mgd...

分類：科學及數學 > 物理學 2016年12月26日

9. ### Physics Rotation?

...where the axis passes through doesn't not contribute to the moment of inertia calculation , because it is regarded as a point mass and is located...

分類：科學及數學 > 物理學 2016年10月31日

10. ### 求數學高手幫忙解答以下combination, permutation問題?

更新： 259350 呢個數係代表 由原本 20 個男同 15 個女入面簡 2 個男 同 4 個女出黎 [ 即 C(20,2) × C(15,4) = 259350 ] 但呢個 259350 係仲未考慮呢 6 個人嘅坐法 如果要考慮埋呢 6 個人嘅坐法 ( 所有可能性...

分類：科學及數學 > 數學 2016年06月14日