Answer Posted / edward the great

Wrong. I would like to point out Karan Rathod's answer is
completely and utterly rediculous and wrong. Even a
completely pure ice block would cause a decrease in water
level. This isn't due to air impurities at all. That is
obsurd. The actual reason for this phenomena is down to
hydrogen bonding that takes place in water and ice, that
causes expansion of water when it freezes [hydrogen bonds
are longer than covelant bonds causing more spaced out
structure, causing water to expand when it freezes]. By
melting ice these bonds aren't held in place and atoms are
free to move over each other, allowing a decrease in volume
and thus a decrease in displacement on water, lowering
water level. Nothing to do with the purity of water and
dissolved gas.

Which is the sound wave that is below the human hearing?

980

---

Explain reflection of light?

1054

---

Tell me how many neutrons and how many protons are present in a single deuterium nucleus?

964

---

Name the metal that burns in oxygen with a dazzling white flame

3849

---

Is a sewing needle magnetic or non magnetic?

1227

---

Give one advantage of a scanning electron microscope over a transmission electron microscope?

1007

---

What is a crest?

1104

---

Tell me why does a tilted gyroscope not fall?

956

---

Explain what is the ray of light?

1029

---

What is centrifugal force?

1057

---

what is momentum?

1101

---

Dear sir, I appeared for the interview for the post of SCIENTIST/ENGINEER 'SC'in ISRO on 02/12/2009. when the resluts will be announced??

2000

---

Explain the domestic consumption of electricity is calculated in?

1008

---

Explain how spectral lines show discrete energy levels in an atom. : quantum physics

983

---

What is the term for the speed at which an object will overcome the gravitational attraction of the earth?

986

---