Recent content by wenxian

Homework Statement Given that high concentration of urea break all bonds except covalent bonds in protein molecules.Which level of protein would remain unchanged when a protein is treated with urea? Homework Equations The Attempt at a Solution tertiery protein why is it...

Got it. Thanks!

This force arises because electrons in molecules are moving at high speed in orbitals. At any instant in time it is possible for more electrons to lie to one side of the molecule than the other one. When this happens, Van der Waal's forces occur. The momentary imbalance of electrons provides...

Thanks for correcting my mistake. That is what I was trying to ask. Can u explain the reason to me ?

Why does the Van der Waals forces of hydrogen weakest in liquid state?

so is it the same reason for the statement '' square root of x is always positive'' ??

i was told that only mammals have(can produce by their own) antibody... then how abt other animals like reptile,bird n fish?? without antibody,how can those animals protect themselves against diseases??

why there is no answer when negative value is being square root? e.g: square root of -9 when i try to find answer from calculator, ''math error '' appears.. so is there an explanation for this question?? this question may looks so weird..but i m juz asking out of curiousity..

thank you so muc! i have got what u were trying to explain to me..:smile:

i m so sorry that i could not understand.. condensation is a process to form bond between diff molecules to become an even more complex structure.. so, bond formation release energy,isn't it?

based on the statement~ '' Formation of amylose and amylopectin release energy.. '' and i was told tat this statement is incorrect.. wat is meant by " formation of amylose and amylopectin " ? Is this a condensation of starch? if so,the process of condensation release energy, isn't it?? :confused:

we can use the dimensional analysis to check the homogeneity of a physical quantity. based on the question : ''can the equation V=ut + at be correct? '', we know that the LHS isn't the same as the RHS.. since the equation is not dimensionally homogenous,so it can never be correct..(the answer...