muskan

the second try is correct. for FCC, contribution per unit cell is 4. the at atom at corner contributes 1/8. if we ignore that, we get 3. (B is not at corners). thus, we get AB3 only. check it out in your NCERT. it's explained in a great way.

the velocity in circular motion is prependicular to path. that's why, if you release the stone, it will move in the direction of the tangent at that point.

i think centriole

Acc. To kelper's law, the sun is at one of the focus of the planet's path. It's an ellipse having two focus and two directrix. Do all the paths of planet, have different foci and directrix or have common focus and directrix?

In 70, the the plate is defined by x=0, y=2 and y= 1/2 x^2. Sir, you took y=0 instead of x=0.

69 and 70. I tried it but i am not getting the answer. 69

I hate Physics. But I love Chem and Math. Should I continue my non-med?

Factorial is given by moving left side of a number till 1. 4! =4*3*2*1 3!=3*2*1 2!=2*1 1!=1 But one is on right side of 0. How can we say that 0!=1 It must be 0. Please clear it.

i learnt naming polycyclic compounds recently. i was curious about the naming of napthlene. but internet didn't give any iupac name for it.

Are bezene, toulene etc. Are common names? If so, what are thier iupac names?

Can you explain me the image formation in case of a person with a lens of power above +4D?

When we add NaCl to water, it dissociates into sodium and chloride ions. Why the sodium cation not joined with the lone pair of electrons on oxygen, whereas in case of HCl, hydrogen joins with those lone pairs of electrons?

What is the difference b/w a simple concave or convex lens and a focal lens?

I mean plane polarized light.

It's carbonyl group

how do we polarize any wave?

pent- 2-one-3-oate

Mid brain is responsible for the sense of right-handedness. But what about the mid brain of Ambidextrous persons and left-handed persons?

if we shift all double bonds of benzene to one side, what will be the effect on the its stability?

Name the compound and functional group.

A person with a concave lens of power -5D has his far point at 20 cm and his near point at 25 cm. How is it possible?

The rays that are diverged from a concave lens, appear to meet at a point. The same rays meet at retina after refraction by a convex lens. Then, the brain makes us able to see the object. Then, why don't we see two images?

We know that concave lens forms a virtual and erect image. But when we wear a concave lens to correct myopia, we don't see a virtual image. Image is formed in the retina and is real and inverted. why?