Recent content by Vipul

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    Is computer science right for me?

    Hi downwithsocks, I am currently a second year student studying Computer Engineering here in Sydney, Australia. It is pretty similar to Computer Science, but with more Math and Electrical aspects involved. As to computer science is concerned, the IT industry is booming worldwide, so jobs...
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    Projectile Motion maximum height

    Did u get the correct answers?
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    Projectile Motion maximum height

    Ok, my answers; a) 34.99m/s to 36.82m/s b) 3.99m to 4.18m
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    What Are the Best Readable General Chemistry Textbooks for High School Students?

    Yes "Chemistry Context" is very informative, i suggest that you have a look at it.
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    Projectile Motion maximum height

    Salman, for part (a), my answers; the range is between 34.99m/s to 36.82m/s. Could you please verify these?
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    How Far Must an Astronaut Be Above Earth to Weigh 0.01 of His Earth Weight?

    Alright, go it; i got 63760km which is from the surface of the earth. Subtracting 63760km - 6378km gives me 57382km. AS Dick said, the answer given is quite wrong, so the answer at the back of the book must be incorrect. Thank you very much, much appreciated.
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    Projectile Motion maximum height

    sorry salman, haven't got the answers yet but still working on them, i thought if u had the correct answers, maybe we can work backwards.
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    How Far Must an Astronaut Be Above Earth to Weigh 0.01 of His Earth Weight?

    I made 'r' the subject of the equation and end up with 1.99x10^5km Here is my working g = GM/r^2 r^2 = GM/0.01 r^2 = (6.67x10^-11 x 5.974x10^24) / 0.01 r^2 = 3.984658x10^16 r = \sqrt{3.984658x10^16} r = 199616081.5m = 1.99x10^5km Please correct me.
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    Projectile Motion maximum height

    Hi Salman, i have been doing some work on this problem, Would you please be so kind to include the correct answers so i can verify and post it?
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    How Far Must an Astronaut Be Above Earth to Weigh 0.01 of His Earth Weight?

    [SOLVED] Gravity question Homework Statement Calculate how far an astronaut would need to be away above the Earth in order for his weight to be 0.01 his weight on the Earth's surface. Homework Equations g = GM/r^2 F = GMm/r^2 The Attempt at a Solution I have no correct way to solve...
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    Production of artificial radioisotopes

    Thanks a lot!
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    Production of artificial radioisotopes

    I am a high school student and i have this question for my project. "How were artificial radioisotopes first produced?" Most of the results i have found are how they are being produced modernly, i would like to know how they were FIRST produced. Thankyou
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    Sigma Notation Problem: Evaluating a Series with n=5 and d=6

    Sorry about that. So i substituted n = 5,6,7 so the sequences is as follows: 31,37,43. So from the sequence a = 31 and d = 6 Substituting into the formula S = n/2[2a + (n-1)d] S = 12/2 [2(31) + (12-1)6] S = 6[62 + 66] S = 6 X 128 S = 768 The answer i get is pretty farout from the actual...
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    Sigma Notation Problem: Evaluating a Series with n=5 and d=6

    [a]1. Homework Statement [/b] Evaluate: 12 \sum (6n + 1) n=5 2. The attempt at the solution So, how do i go about doing this? I tried finding the first three numbers of the series to find the difference by substituting n = 5,6,7 and then use the Sum formula S = n/2[2a +...
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