Do you Know ?

[Perfection]

1. Sudden fall of atmospheric pressure forecasts storm or cyclone.

2. Gradual fall of atmospheric pressure forecasts rain.

3. Halo around the Sun / Moon is often followed by rain. The bigger the halo, sooner it will rain.

4. Wet climate produce chirping by cricket.

5. Rest less pig forecasts gale or storm. Morning rainbow in the west means rain.

[Perfection]

1. 248 million years ago the only continent Pangea was surrounded by world ocean Panthalasa.

2. Earth is rotating in the South - North axis.

3. Equator travels faster than places at higher latitudes. The air at North pole is at rest.

4. Dust in the cloud make it dark.

5. Tornadoes can destroy any thing manmade in it's path.

6. Human rights : Protection from arbitary arrest, forced emigratrion and detention. Prohibit slavery and torture. Condemn execution or imprisonment of one's opinions. They condemn discrimnation. They protect private property and insist on fair trials.

[Perfection]

Chemical warfare

Agent Sarin : German poison discovered in 1938, isopropyl methyl phosphoro fluoridate. It is the original nerve gas. The poisonous gas is difficult to manufacture. The lethality of the gas is very high and it affects the nerve system to incapcitate the enemy. Other poisonous gases are Soman, Tabun etc.

[Perfection]

APRIL

5 April : National Maritime day

7 April : World health day

15 April : International special librarians day

17 April : World Haemophilia day

18 April : World Heritage day

21 April : Secretaries' day

22 April : Earth day. Started celebrating from 1970 to aware people about the dangers of over population & energy waste.

23 April : World book and copyright day

[ftvfatboy]

perfection good and useful thread

[Perfection]

Plasma : It is the fourth state of matter (solid, liquid, gas and plasma) exists at very high temperatures. Plasma consists of positive ions and electrons. They are electrically neutral. They can be confined by electric and magnetic fields. More than 90 % of the universe is in Plasma state. The name was given by Irving Langmuir.

Do you heard about the fifth state of matter ?

[Perfection]

Minimum distance to hear an echo is 17 metre. If the sound is reflected back on less than 0.1 second, no echo is heard. The effect of sound on ear remains for 0.1 second.

Horse shoe (U shaped ) magnets can tretain magnetism for a long time. Keeper is used with magnet while storing.

Fluorescent tube gets warmed up and the mercury volatises, the discharge produces Ultra violet radiations and it falls on the fluorescent material (Silicates of Zinc and Cadmium) to emit light.

[Perfection]

1 May : International Labour day

3 May : World Asthma day

2 nd Sunday in May : Mother's day

8 May : World Red Cross day

9 May : World Thalassaemia day

12 May : International Nurse's day (Birthday of Florence Nightingale - lady with a lamp)

15 May : International day of the family

17 May : World Telecommunication day

24 May : Commonwealth day

31 May : Anti Tobacco day

[Perfection]

4 June : International day of Innocent children victims of Agression
5 June : World environment day
June 3 rd sunday : Father's day
20 June : World refugee day.
26 June : International day against drug abuse and illicit trafficking

[Perfection]

6 July : World zoonoses day

11 July : World population day