Biology; Chemistry; Physics: Post your doubts here!

[multixamza01]

i meant to ask dat the d0pic which is under discussi0n is frm physics 0r n0t!

This is a kind of topic of Combined Sciences . So yeah in a way it is Physics .

 

[Spidey21]

This is a kind of topic of Combined Sciences . So yeah in a way it is Physics .

dude what did you score in Maths mocks?

 

[Tharindu]

What are the reducing agents and oxidizing agents? Is potassium permangate a reducing or oxidizing agent???

 

[Tharindu]

Does anybody hav a note on chemistry on what we should memorize on...the memorizing things for the exams?..this will be very useful to me and others coz I don't wana memorize the whole book

 

[convent2012]

KMnO4 is a strong oxidizing agent
An oxidizing agent (also called an oxidizer ) can be defined as a substance that removes electrons from another reactant in a redox chemical reaction. The oxidizing agent is "reduced" by taking electrons onto itself and the reactant is "oxidized" by having its electrons taken away.
a reducing agent (also called a reductant or reducer) is the element or compound in a reduction-oxidation (redox) reaction that donates an electron to another species; however, since the reducer loses an electron we say it is "oxidized". This means that there must be an "oxidizer"; because if any chemical is an electron donor (reducer), another must be an electron recipient (oxidizer). Thus reducers are "oxidized" and oxidizers are "reduced".

 

[Spidey21]

What are the reducing agents and oxidizing agents? Is potassium permangate a reducing or oxidizing agent???

well let me share with you a tip

KMnO4
K2Cr2O7 both are OXIDISING AGENTS...now whats common here...lets see..oh....they both have alot of O atoms....so i used the trick to remember that these two have great amount of O atoms so they just give them away and Reduce themselves and oxidise the other...
same is with KI, has no O atoms so its a reducing agent...

 

[fatikhalid]

i meant to ask dat the d0pic which is under discussi0n is frm physics 0r n0t!

yea its 4m physics!!..though i know it seems more lyk computer!!!..

 

[Spidey21]

Glad Tharindu and Rimsa found it helpful!!

 

[fatikhalid]

does aceleration depends upon mass of an object???

 

[Rimsa]

does aceleration depends upon mass of an object???

yes. it decreases with increasing mass.

 

[fatikhalid]

yes. it decreases with increasing mass.

shouldn't it increase with increasing mass??

 

[fatikhalid]

yes. it decreases with increasing mass.

beacuse see W=mg
m increases w increases
W=F
F=ma
so F increases a increases
no?

 

[multixamza01]

beacuse see W=mg
m increases w increases
W=F
F=ma
so F increases a increases
no?

sure , but you skipped the part that you asked:

F/m = a

so when m increases a decreases .
Mass is proportional to accelaration (if Force remains constant ) but is certainly not dependent on it .
Dependence would mean that a specific mass produces only a specific accelaration. Which is totally wrong.

So the answer to your question is : No

 

[fatikhalid]

sure , but you skipped the part that you asked:

F/m = a

so when m increases a decreases .
Mass is proportional to accelaration (if Force remains constant ) but is certainly not dependent on it .
Dependence would mean that a specific mass produces only a specific accelaration. Which is totally wrong.

So the answer to your question is : No

thankuu..

 

[multixamza01]

thankuu..

glad-to-help

 

[fatikhalid]

glad-to-help

 

[Tharindu]

shouldn't it increase with increasing mass??

According to newton mass decreases with acceleration...however according to einstein you are correct..

 

[Tharindu]

According to newton mass decreases with acceleration...however according to einstein you are correct..

As long as we are concerned (o levels) the answer to this question is that mass decreases.....but you are not wrong

 

[fatikhalid]

According to newton mass decreases with acceleration...however according to einstein you are correct..

As long as we are concerned (o levels) the answer to this question is that mass decreases.....but you are not wrong

haha k thnx!!..

 

[Spidey21]

haha k thnx!!..

its a nice debate...Einstien vs Newton!!