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.
...information (from Yahoo/Google) - use the "calculator" function for calculations during lessons => save the trouble of bringing a calculator to school...
...for DL081797 for pointing out my mistake in my original calculation . It has been corrected now ]. (c) Equivalent...
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"
... into vertical and horizontal components. This makes the calculation even more clumsy. Since N1 is already perpendicular to AB...
... 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...
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...
...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...
...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...
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...