its quite cool tht u r actually older than me!!!

but im finishing 12th now...so jus 2 months left...

i am academically older i suppose!!!

read arihant mechanics its really gud...u'll understand constraint rel n everything else from tht...all arihant books r really gud

rate me if u find this useful

if u wanna undestand it really well study jd lee..

u can also look up aieee chem

its a damn gud book...

the author is on the forum here i think

 

no heat change transfer or mass or vol transfer in isolated system...

both r present in open system...

and in closed sys heat exchange is there but no change in mass..

rate me if u happy

let it b thrown at  with v

comp in hor is vcos and vertical is vsin

vcos will not get affected as no chang in hor vel

in vertical vel becomes root of(v²sin² +2gh)

 

at bottom vel is root of v_x² + v_y²  root of (v^2(sin^2 + cos^2) + 2gh) which is root of (v^2 + 2gh) which is indep of the angle of throwing so for all angles same vel at bottom

sincos =sin2/2

which has min value (-1)/2

as sin has min value -1

i tend to agree wid d fiitjee ans...

each nucleus is a man 4 itself..:)

it does not depend on other nuclei..

but wat is ur logic???