Recent content by zainriaz

first try to find the percentage of carbon from CO2 and hydrogen from h20 and sulphur from so2 then calculae percentage of oxygen from it. now find mole of each element from its percentage .then find its atomic ratio.this would give the value o empirical formula.

as the mass increase moment of inertia increase so it slows down the system am i right?

an object has 1 joule of potential energy means that the object has the capacity to do the work of 1 joule! may be now i m right

i tried to find the answer for this question from many sites at last i tried this site it is a theoritical question how can u show an attempt for it?

Homework Statement what is meant by ' an object has one joule of potential energy'? Homework Equations The Attempt at a Solution

Homework Statement Why does a coasting rotating system slows down when a slice of bread is put on it? Homework Equations The Attempt at a Solution

Homework Statement stand with one arm and the side of one foot pressed against a wall. can u raise the other leg side ways?if not then why not? Homework Equations The Attempt at a Solution i tried myself but couldnot raise.i m not getting the reason.

thanks a lot

so the element is calcium thnx a lot for ur help

total MF2=46.8GMS atomic mass of flourine=19 g/mol mass=moles*atomic mass =0.6*19 = 22.8gms hence mass of element M=46.8-22.8 =24gms molar mass of element M=mass of M/moles of M =24GMS/0.6...

i tried my best i m nt getting which formula to use

Homework Statement a sample of 0.6 moles of a metal M reacts completely with excess of flourine to form 46.8 gms of MF2. a)how many moles of F are present in the sample of MF2 that forms? b)which element is represented by the symbol M? Homework Equations NO. OF MOLES=given mass/molar...

A- B= (6-(-4))i+ (9- 4)j, etc. If you are expected to do these as homework, certainly the definitions of A+ B, A- B, and A.B must be in your textbook! i no it is the dot product question but the confuzing thing is that in A=the units r i^and k^ but in B=the units r i^and j^ how can we...

i m just confused because of the diferent unit vectors! in both equations

so can i get that easier method to solve this problem