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i) there will be a point in the field between the two, where Moon's gravitational field will cancel out earth's Gravitational field.
Check here:Need topic wise past papers please
Thankyou so much!
Welcome!Thankyou so much!
jazak Allah
I think you can do either way, and they'd accept it. I used to get confused about this too. I can't remember clearly now but I think what I did was, for time measurements, I would stick to 3 significant figures, so my measurements would be like: 0.568, 0.789, 1.25guys, in practical, whats more important in a column??? Significant figures or decimal places? like if I get my results 0.58, 0.96, 1.23. should I make them all 3 s.f? or leave them because they're all the same decimal places?
Let me do the first example for you:can someone tell me how to find the errors for d^2View attachment 57052
oh thankyou so muchLet me do the first example for you:
(2.1±0.1)^2
First, find the percentage error:
0.1/2.1*100% = 4.76%
So our problem now becomes:
(2.1±4.76%)^2
Remember that when we add values, we add their uncertainties. When we subtract values, we also add their uncertainties. When we multiply values, we add their PERCENTAGE uncertainties, and when we divide values, we add their percentage uncertainties as well.
When a value is raised to a power (Eg ^5), the percentage uncertainty is MULTIPLIED by the new power (ie 5)
So here: (2.1±4.76%)^2 = 2.1^2 ± 4.76*2% = 4.41 ± 9.52%
Convert the percentage back to real uncertainty now:
9.52%* 4.41 = 0.419832
So our number now becomes:
4.4±0.4
Note that our number should be to two significant figures since the original number was also to two sig and our uncertainty should only have one significant figure
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