B,chck under metallic sulphidez

t.boy007:
D

Apy sundae,itz a nw wk 2day...datz da wk of roundn off.i pray miracle apens ds wk ijn

Sum1 tak ds:what z da kinetic energy of a ston of mass 4kg dropped frm an height of 15m,reachd one-third of the total height wit a velocity of 20m/s? A.400j b.800j c.200j d.1000j

buzyguy: Sum1 tak ds:what z da kinetic energy of a ston of mass 4kg dropped frm an height of 15m,reachd one-third of the total height wit a velocity of 20m/s? A.400j b.800j c.200j d.1000j

C

buzyguy: Sum1 tak ds:what z da kinetic energy of a ston of mass 4kg dropped frm an height of 15m,reachd one-third of the total height wit a velocity of 20m/s? A.400j b.800j c.200j d.1000j

v at maximum height=root 500
therefore height=15/3=5
k.e=1/2mv^2
=>1/2 * 4 * root 500^2
=>500 * 4/2=1000 j
D

Element A has a mass number of 22 and atomic number of 10 another isotopy of the the element B has mass number 20 and atomic number 10 in the ratio 2:3, calculate the percentage abundance of A
a)10 % (b) 70% c) 40% d) 35%

t.boy007:
Element A has a mass number of 22 and atomic number of 10 another isotopy of the the element B has mass number 20 and atomic number 10 in the ratio 2:3, calculate the percentage abundance of A
a)10 % (b) 70% c) 40% d) 35%

C- 40%

t.boy007:

v at maximum height=root 500
therefore height=15/3=5
k.e=1/2mv^2
=>1/2 * 4 * root 500^2
=>500 * 4/2=1000 j
D

PLS WHERE DID U GET THE 500 OR IS IT CONSTANT?

sagaciousblog: PLS WHERE DID U GET THE 500 OR IS IT CONSTANT?

it's not a constant ...maximum velocity

t.boy007:
it's not a constant ...maximum velocity

i mean how did u get the 500 cos it was not in the question

Morin to all!

Sorry 4da absenc,phne flex prbm...yeah,pertainin to da questn u all tried wit concrete reasnz bt da kinetic energy the at the point 1/3 of da original height z jst da difrnc btwn da origan nd presnt height wich z 2/3 of 15=10 as da height,substitutn to Mgh we wil our desired ansa,so far da kinetc z convertd to da potential energy.U ALL knw kinetic energy z alwyz zero at any givn height unlez itz convertd to potential energy*note:dat velocity z jst 4 decoratn.apy readn nd roundn off.

buzyguy: Sum1 tak ds:what z da kinetic energy of a ston of mass 4kg dropped frm an height of 15m,reachd one-third of the total height wit a velocity of 20m/s? A.400j b.800j c.200j d.1000j

Bio: in a fish pond,250 fishez were captured, markd with ink nd returnd to da pond.afta a month the owner catchez 600 fishez of wich 200 are markd.estimate da populatn of the fishez in da pond at dat period of time.

Wich of da follown hz da heighest chang of speed during dispersion through a triangular glaz prism? A.violet b.blue c.red d. Orange

In a compound microscope,the distanc btwn the objectve lens nd eye piece z ,a.equal to da curvature b.lez dan d sum of the two focal lengths c.equal to da sum of d two focal lenghts d.z more dan da sum of da two focal lengthz.

buzyguy: Wich of da follown hz da heighest chang of speed during dispersion through a triangular glaz prism? A.violet b.blue c.red d. Orange

C

buzyguy: Sorry 4da absenc,phne flex prbm...yeah,pertainin to da questn u all tried wit concrete reasnz bt da kinetic energy the at the point 1/3 of da original height z jst da difrnc btwn da origan nd presnt height wich z 2/3 of 15=10 as da height,substitutn to Mgh we wil our desired ansa,so far da kinetc z convertd to da potential energy.U ALL knw kinetic energy z alwyz zero at any givn height unlez itz convertd to potential energy*note:dat velocity z jst 4 decoratn.apy readn nd roundn off.

BOSS, HOW DID U GET 2/3?

buzyguy: Bio: in a fish pond,250 fishez were captured, markd with ink nd returnd to da pond.afta a month the owner catchez 600 fishez of wich 200 are markd.estimate da populatn of the fishez in da pond at dat period of time.

750

buzyguy: Bio: in a fish pond,250 fishez were captured, markd with ink nd returnd to da pond.afta a month the owner catchez 600 fishez of wich 200 are markd.estimate da populatn of the fishez in da pond at dat period of time.

captured fishes = 250
after a month, 600 fishes were captured of which 200 were earlier captured (i.e capture recapture method of estimating population)
50 out of the earlier captured 250 fishes must have been eliminated due to some factors.
So there fore; population of fishes @ dat period of time = 600

Itz da fractional diffrnc btwn da maximum nd present height wich z,1-1/3 makn 2/3 of da max.height. Hop clear!

sagaciousblog: BOSS, HOW DID U GET 2/3?

Vry correct!

sagaciousblog: 750

Anoda1:wich of da follown rays or particlez haz da highest ionizatn power. A.alpha b.beta c.ultra-violet d.gamma

U really tried,bt u cn try ds formula (A * b)c,whr a z da initial captured,b z da scnd captured,whil c z da markd among da scnd captured.substitutn da values,itz wel done.*note formula applicable to all questnz unda the estimate.thks!

Chelcy10:
captured fishes = 250
after a month, 600 fishes were captured of which 200 were earlier captured (i.e capture recapture method of estimating population)
50 out of the earlier captured 250 fishes must have been eliminated due to some factors.
So there fore; population of fishes @ dat period of time = 600

buzyguy: Itz da fractional diffrnc btwn da maximum nd present height wich z,1-1/3 makn 2/3 of da max.height. Hop clear!

kk tanx

Hmm,*note chang in speed z gr8test for violet with lowest speed,lykwze chang in speed z least for red with gr8test speed.'tricky!'

sagaciousblog: C

buzyguy: Hmm,*note chang in speed z gr8test for violet with lowest speed,lykwze chang in speed z least for red with gr8test speed.'tricky!'

kk tanx pls bring more oo cos am always refreshing dis page for ur questions

What z the nature of image formed by a pin-hole camera. A.inverted nd magnified b.invertd nd diminishd c.sam size nd invertd d.either of the above

buzyguy: Anoda1:wich of da follown rays or particlez haz da highest ionizatn power. A.alpha b.beta c.ultra-violet d.gamma

A

buzyguy: What z the nature of image formed by a pin-hole camera. A.inverted nd magnified b.invertd nd diminishd c.sam size nd invertd d.either of the above

B

Vry correct!

sagaciousblog: A

Size of the image formd z only dependent on the movement of da object to nd fro da hole.if da objct z moved towards da hole the image bcomes more enlarged nd vice versa.it may evn av sam height wif da image,depending on itz positn frm da hole.una wldne bro!plz brng questnz.

sagaciousblog: B