Recent content by fatima_a

A star exhibits a parallax of 0.250 arcseconds when measured from Earth. a) What is its distance (pc)? I know this uses the formula d=1/p, so i can solve this very easily b) What would its parallax be if measured from Venus’s orbit (arcseconds)? (Look up the one parameter you need to...

the half life of C14 is 5730 years. if a sample of C14 has a mass of 20 micrograms at time t = 0, how much is left after 2000 years? I learned from somewhere that these exponential decay and half life problems use the equation y = ab^t or y = a(1+r)^t where y = total, a = initial...

in this picture, there is a legend with the terms LINE and SINE in it http://i.imgur.com/IGJfm.png what do the terms LINE and SINE mean? I mean what do they stand for and what is their purpose in DNA. I have tried to look them up but it keeps going to math.

here is a link to the procedure of the experiment, but i don't know what the purpose of this is...like in practical life what is it used for. http://i.imgur.com/JkrhO.png thanks

wow thank you so much that was really very very helpful. i finally understand what my prof meant

I though the mRNA was altered and stuff before the final protein product was made, but is DNA also altered because it's like a protection mechanism or something? thanks

if you are in university then you will have to log in from your university email address and then use the library services to be able to get journal articles for free, if you are not doing that then you will not be able to access anything related to your lab report free. sometimes google scholar...

hello i was just wondering what is considered to be the finger print region in an IR spectrum. Is there a range of wavenumbers which are designated as the finger print region? ...let me clarify um so a C-O bond in an ether (and maybe alcohol) is suppose to have a peak in the 1000-1200cm^-1...

what is the difference between neoteny and post development according to my lecture neoteny = early maturation of gonads in larva that then stops growing and never becomes an adult post development = onset of a developmental process is delayed relative to reproductive maturation...

the data was collected just by observation outside like counting the number of birds you see or the people that walk by.

so this is for my lab report for ecology. i need to have a figure showing at least 1 stat test. the hypothesis i am trying to prove is that diversity of birds will be greater in disturbed areas (like with human influence) compared to woodlot (like forest and such) from the data...

thanks i got it

find the equation of the normal line to the curve y = -3x^2 at the point (-1,-3). you have to use derivatives. i am not asking for the equation of the tangent line i know that is 6x + 3. please show all the steps. the answer is y = -1/6x - 19/6

this website really helped me understand identities. do read through the whole thing http://www.intmath.com/Analytic-trigonometry/1_Trigonometric-identities.php

simplify the following expression log2 4^3x-1 (2 is a subscript of log and 3x - 1 is a superscript of 4) i can rearrange this to 4log2 3x - 1, i am thinking after this it becomes 4 log3 + 4 logx, but i don't know what to do with the -1 please show all the steps and explain.