Recent content by Raul Lai

thx a lot

I think both are wrong...

Recently, I have read a old book with an article about two kids arguing the problem of Sun. One day, Confucius heard two kids arguing on the road. One said "in the morning, the sun rises, it is closer to the ground and look as big as a roof of the carriage. In the afternoon , the sun is far...

you have a nice day too,I hope I am not a stupid and trouble guy in your mind. Can I make a friend with you?

hay~I got it. I know what wrong I did. Actually, my result is very accurate. thank you very much. I think my report is the best in my class. I have make a silly mistake a whole day! thanks for your support. I can make a good dream now. The y-intercept is 0.0944 not 1.3. sorry to let you worry.

the experiment I did is by my own hands but, it is fine. I give up now. I should change the data to fit it Thx for your help, it wasted you so much time anyway, thank you.

but it is impossible, as other group did the result of slope is 4.0875 it similar to me. beside, the error is too large

It is 11pm in HK, I have no time

I count it with rhythm...3,2,1,0,1,2,3...the reaction time delay is deminished

I don't think the the time for oscillation get systematic error, I count it by a stopwatch.

if the ruler reading switched, all the length measured are also switched. By the equation, T square=4πsqure(L/g), if L get greater, the graph will switch upward. if the air resistance exist, the period will get larger, by T=2πroot(L/g),the graph will also switch upward.

maybe air resistance?

systematic error? do you mean the length of my meter ruler is wrong mark. But this is bizarre, it is too large.

I got another problem, when I put g=9.81 into the equation to find period square and plot a graph. It still cannot pass the origin.

about 1.3