The Maths and Science Thread - Collection of Problems and Facts

[Bounce]

Reps to the one who proves it -

"Prove that negative signs cancel each other during division."

A simple solution.
We all know that the value of any number doesn't change when its multiplied and divided by the same number, except than 0.

We know:
(a+b/a+b) = 1

Therefore, if (a+b/a+b) is multiplied and divided by -1, it becomes [-(a+b)/-(a+b)] and is equivalent to (a+b/a+b).

Thus,
(a+b/a+b) = [-(a+b)/-(a+b)] = 1

Hence, negative signs cancel each other during division.

 

[Abhas]

What else did I do? :sarcasm

 

[Bounce]

What else did I do? :sarcasm

Where!
Did you post the solution?

Bounce added 1 Minutes and 13 Seconds later...

Oops!
Didn't see this

Better presentation than me mate!

 

[ARay]

Better presentation than me mate!

Or maybe you can read the initial few pages better.

 

[Abhas]

It's funny because you've used exactly the same things to prove it.. (a+b) lol

 

[Bounce]

It's funny because you've used exactly the same things to prove it.. (a+b) lol

Not much options.

"x and y" are way too common and "p and q" are conventionally used in Geometric terms.

 

[_Nabeel_]

A Simple Science Question...

Chromosome is made up of 40% DNA and 60% Histone Protein.
Histone Protein is defined as Basic Protein,and Protein is defined as Amino Acids,which indirectly means Basic Amino Acid.

Now,How can a chemical be Basic as well as Acid,or how can an Acid be Basic?

 

[Varun]

Amino Acid.

Amino acid is just a name. It isn't really an acid.




Need a help with a Physics question :

A plane mirror is made of glass slab ( R.I.=1.5) 2.5 cm thick and silvered on back. A point object is placed 5 cm in front of the unsilvered face of the mirror. What will be the position of final image from the unsilvered face ?

 

[ARay]

Amino acid is just a name. It isn't really an acid.

:laugh
Of course not! It is called amino acids for a reason.

An amino acid has NH2 group (basic properties) as well as COOH group (acidic properties). Hence amino acids act as buffers. Amino Acids in our body also helps maintain pH levels in our blood. If there are excess H+ ions it is absorbed by the NH2 group to form Nh3+.
If there are excess OH- it taken up by the COOH group.
Basic chemistry

 

[Varun]

Okay, can you answer my physics question ?

 

[ARay]

Okay, can you answer my physics question ?

I am useless with physics :crying

 

[Kshitiz_Indian]

Amino acid is just a name. It isn't really an acid.




Need a help with a Physics question :

A plane mirror is made of glass slab ( R.I.=1.5) 2.5 cm thick and silvered on back. A point object is placed 5 cm in front of the unsilvered face of the mirror. What will be the position of final image from the unsilvered face ?

If its a point object, it is always vertical to the surface of hte glass slab hence the ray wouldn't deviate at all, which means hte image would be formed at the normal position. But a point object has other rays too... I'll think about it

 

[ste_mc_efc]

:laugh
Of course not! It is called amino acids for a reason.

An amino acid has NH2 group (basic properties) as well as COOH group (acidic properties). Hence amino acids act as buffers. Amino Acids in our body also helps maintain pH levels in our blood. If there are excess H+ ions it is absorbed by the NH2 group to form Nh3+.
If there are excess OH- it taken up by the COOH group.
Basic chemistry

Zwitterions.

 

[Bounce]

A plane mirror is made of glass slab ( R.I.=1.5) 2.5 cm thick and silvered on back. A point object is placed 5 cm in front of the unsilvered face of the mirror. What will be the position of final image from the unsilvered face ?

Difficult one boy.
Will have to think hard for it.

 

[Brook]

Oh if you like logic puzzles, then you guys should see a spanish film called Fermat's Room, or La Habitacion de Fermat.