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Chemistry / what happens if we put potassium in liquid hydrogen...?
« on: 02/02/2016 17:59:03 »
what happens if we put potassium in liquid hydrogen.....doest burn or explode. .
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2
General Science / Why are batteries defined in terms of voltage, but wires in amperage or current?
« on: 02/06/2015 12:50:19 »
why we say for primary batterys power ....its volt.........but in elecrcity wires we say the power is amp
3
Physics, Astronomy & Cosmology / Which isotopes are required for nuclear fusion?
« on: 15/05/2015 19:27:56 »
which isotopes required easy
temperature for nuckler fusion
T+T or D+D
and explain why....
temperature for nuckler fusion
T+T or D+D
and explain why....
4
Physics, Astronomy & Cosmology / question for support combustion nitrogen gas
« on: 22/01/2015 12:26:32 »
is it true that nitrogen gas can only support combustion in very high combustion temperature....and why
5
Chemistry / Question for galvanic cell
« on: 19/11/2014 11:39:18 »
Is there really two types of galvanic cell......one solution electrolyte. ...and .....two solution electrolyte
.
.
6
General Science / What's best for a soundproof wall, hollow or solid bricks?
« on: 02/09/2014 12:14:50 »
What is better bricks for a soundproof wall, outdoor sounds.... hollow bricks or solid bricks .....and why.
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Physics, Astronomy & Cosmology / which element that has more powerful flame temperature.. .potassium or magnesium
« on: 03/07/2014 19:58:32 »
If we say ....k flame temperature has 771c
and Mg flame temperature has 3100c
But in series reactive table in air reaction.......potassium will be the first element on the top of the chart for the most burning element ...can you explain.
Here is an example
and Mg flame temperature has 3100c
But in series reactive table in air reaction.......potassium will be the first element on the top of the chart for the most burning element ...can you explain.
Here is an example
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Chemistry / can you write these elements up to down ..from more reactive to less reactive
« on: 19/06/2014 19:29:53 »
can you write these elements up to down ..from more reactive to less reactive
F O N C Cl S P I Br.....
F O N C Cl S P I Br.....
9
Chemistry / What are transition metals' and non-metals' chemical properties?
« on: 14/06/2014 12:59:55 »
what does mean transition metals can catalyze the chemical reaction
and nonmetals can speed up the chemical reaction....like sulfur
and nonmetals can speed up the chemical reaction....like sulfur
10
Chemistry / can you give example of monomer compounds
« on: 22/05/2014 18:15:21 »
can you give example of monomer compounds....thanks you
11
Cells, Microbes & Viruses / Do high temperatures increase viruses in your body?
« on: 20/05/2014 19:28:38 »
does high temperature increase virus in body....and how.
12
Physics, Astronomy & Cosmology / does plasma happen in soild state
« on: 28/04/2014 21:45:56 »
like a electric wire ......when current move pass throu electric wire many electrons separate free from there ions...does this called plasma
13
Physics, Astronomy & Cosmology / question of plasma ball
« on: 09/04/2014 21:20:55 »
if we have 3 plasma ball.and they have the same pressure gas ...one have low current power .the scond have middle current power .the third have strong current power .. ...so which will of them produce ...light ..plasma ...spark..
14
Physics, Astronomy & Cosmology / Does an x ray involve thermal radiation?
« on: 24/03/2014 18:32:18 »
does x ray involve thermal radiation.......and why
15
Physics, Astronomy & Cosmology / which element is harder to ignite by heat...calcium or lithium.
« on: 23/03/2014 12:47:26 »
which element is harder to ignite by heat ....calcium or lithium. ..and why....
16
General Science / what is difference word meaning ......enigma and mystery.....?
« on: 22/02/2014 18:49:39 »
what is difference word meaning ......enigma and mystery....?
17
Technology / what is difference pixel shape between digtal and analog screen
« on: 19/02/2014 18:54:37 »
what is difference pixel shape between digtal and analog screen..?
18
Chemistry / how to calculate ph for any type of compound.....??
« on: 15/02/2014 19:40:23 »
example......Co2 and KNo3
19
Physics, Astronomy & Cosmology / What is the difference between a shockwave and a blastwave?
« on: 03/12/2013 07:58:27 »
can you give me an example for blastwave and shockwave in modern source life...
20
Physics, Astronomy & Cosmology / How are shock waves and blast waves created?
« on: 24/11/2013 11:21:06 »
and also what is the effect damage for ..shock wave and plast wave for each of one..