Biology; Chemistry; Physics: Post your doubts here!

[Lilly2318]

this Q 8 nd9

8 is D cuz 5x 3 =15

 

[peacce]

this Q 8 nd9

there is no 9 .. plus i hv already postd d ans dear ineed to undrstnd dem

 

[Lilly2318]

look at inner walls of the wooden blocks..... first points at 3.5 2nd at 8 so 8-3.5=4.5

is centrpetal force in our course? if so plz explain

 

[peacce]

8 is D cuz 5x 3 =15

y 5*3? .. cn u xplain wht r they askng in ds question ?

 

[Lilly2318]

see F=kx where k is constant. f force x extension

 

[Lilly2318]

Help

yea one crest and one trough.......

 

[Lilly2318]

ans is b. why?

yea one crest and one trough.......

 

[peacce]

see F=kx where k is constant. f force x extension

dis equation is going for division wen m puttng in d values

 

[peacce]

?

 

[Lilly2318]

?

5 constant , u need force. multiply 5 by 3 the xtension

 

[Abdul Hanan]

2nd one is B as volume of air is decreased in container which leads to more volume in balloon as pressure to its outside walls decreased . pressure in balloon decreases as volume increased of balloon. and particles hit walls of balloon less often.

 

[FLRNAB]

There is bending inside the lens as well and you are not taking that into account for the rays not parallel to Principal Axis.

 

[Abdul Hanan]

There is bending inside the lens as well and you are not taking that into account for the rays not parallel to Principal Axis.

i dont think any marks are deducted for not bending inside but if they are, do tell me!!!

 

[peacce]

what is this reed? Xplain dis mcq plss

 

[peacce]

how come is it 60? should it b same as the incident angle i.e 30 ?

 

[peacce]

Y B when diagnl is D ?

 

[Lilly2318]

what is this reed? Xplain dis mcq plss

what the ans

 

[Abdul Hanan]

how come is it 60? should it b same as the incident angle i.e 30View attachment 42960 ?

90-30 gives incident angle =60

 

[Lilly2318]

how come is it 60? should it b same as the incident angle i.e 30View attachment 42960 ?

no angle of inc is 90-30

 

[Lilly2318]

Y B when diagnl is D ?View attachment 42961

B for P.E