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Can someone explain to me how are stem cells produced in our body?

Never mind i got it

^ Question

Thank you :)

Does the radius in the orbital velocity formula take into account the radius of the planet + altitude? Or just the altitude of orbit? THANKS!

thank you :D

I am assuming 12.7

Is the pH of the solution 2.7 or 12.7?

Question: i know that in plants, the leaf is a food source and that it would bring sucrose and other nutrients to a sink cell where the product of photosynthesis is required for cell growth E.g. root cells. However, sometimes when there is excess sucrose, the leaf would transport it to a storage...

re: HSC Chemistry Marathon Archive Yeah i got 0.46V too :)

Oh my gosh.. i just realised that the q is asking me for the genotypes of the parental generation too lol.. i was wondering how the f1 generation would have a genotype of WW and RR. Thank you, gada1 ^^

Using snapdragons, homozygous white flowering plants were crossed with homozygous red flowering plants. All F1 plants had pink flowers possible genotypes for the plants (in named order) would be: (A) WR, RR, RR (B) WR, WW, WR (C) WW, RR, RW (D) WR, RW, WW I need a guide on how to solve...

Biggest challenge: Surviving the hsc and get the atar

No problem :) and yeah, sometimes doing extra steps might result in an answer that is a couple digits away from the ans that you are suppose to get.

My ans is quite straight forward: Simply 33.5kJ/g x 60 (molar mass of propanol according to my periodic table) = - 2010 kJ/mol (exothermic reacttion)

Ehhh it was asking for change in ethalpy not change in Temp (Degrees). I see you got 2013kj/mol? That is kind da close to my ans. Perhaps different periodic tables

Btw, I pmed you my working out

I got approx. 2010 kJ/mol as my answer but since it is an exothermic reaction (combustion), the change in enthalpy should be negative so -2010kJ/mol

Start working ..

It will help me in the future so I might just learn the content and make my life easier when I study the degree that I want at uni