3 minutes ago, DimaMazin said:

Teachets teached us 0/0=1

What is in Israel?

 

 

 

0/0=1 is wrong everywhere.

In US we were taught zero is a rational number, which means it must have a nonzero denominator, i.e. it is 0/1.  A rational number cannot have a zero denominator.  I have have no idea what 0/0 is, but it cannot be a ratio.  

58 minutes ago, Genady said:

0/0=1 is wrong everywhere.

Well. 0/0=unknown

Then E₁=unknown²×0=0

E₂=unknown²×0=0

35 minutes ago, DimaMazin said:

unknown²×0=0

No such thing.

26 minutes ago, Genady said:

No such thing.

Well. any²×0=0

 

Just now, DimaMazin said:

Well. any²×0=0

 

Not any. Only numbers.

3 hours ago, DimaMazin said:

Teachets teached us 0/0=1

What is in Israel?

 

Consider the following

 

Let

[math]y=\frac{{{2^x}-1}}{x} [/math]

 

What is y when x = 0 ?

Clue it is not 1 it is about 0.693

Edited August 19, 20232 yr by studiot

5 hours ago, Genady said:

Not any. Only numbers.

You don't know what is 0/0. Then what do you try to explain?

24 minutes ago, DimaMazin said:

You don't know what is 0/0. Then what do you try to explain?

Division by zero - Wikipedia

Quote

division by zero is undefined (a type of singularity). Since any number multiplied by zero is zero, the expression  is also undefined

 

1 hour ago, Genady said:

Division by zero - Wikipedia

 

Do you think that undefined opinios of mathematicians are more useful in physics than laws of physics?

7 hours ago, studiot said:

 

Consider the following

 

Let

y=2x−1x

 

What is y when x = 0 ?

Clue it is not 1 it is about 0.693

For y=x/x

When we approach x to 0 there is no changing of the result.

5 hours ago, DimaMazin said:

For y=x/x

When we approach x to 0 there is no changing of the result.

What a pity you didn't simply ask how I came to my answer.

If we try to substitute x = 0 into the given expression we find

 

[math]\frac{{{2^x} - 1}}{x} \to \frac{{1 - 1}}{0} \to \frac{0}{0}[/math]

 

Which we know we cannot do.

 

But the situation is remedable as we can apply l'Hopital's rule thus

 

[math]\frac{{\frac{d}{{dx}}\left( {{2^x} - 1} \right)}}{{\frac{d}{{dx}}\left( x \right)}} = \frac{{2^x}\ln 2}{1} = \ln 2 = 0.693[/math]

 

 

Edited August 20, 20232 yr by studiot

8 hours ago, DimaMazin said:

Do you think that undefined opinios of mathematicians are more useful in physics than laws of physics?

I don't need to think so because there is no conflict between mathematics and physics. 

YOUR so-called "laws of physics" are nonsense.

3 hours ago, Genady said:

I don't need to think so because there is no conflict between mathematics and physics. 

YOUR so-called "laws of physics" are nonsense.

Let's use conservation of momentums for correct addition of velocities

V₃×gamma₃=v₁×gamma₁+v₂×gamma₂

Just now, DimaMazin said:

Let's use conservation of momentums for correct addition of velocities

V₃×gamma₃=v₁×gamma₁+v₂×gamma₂

It is not a "correct addition of velocities."

1 hour ago, Genady said:

It is not a "correct addition of velocities."

When travelers ,relative to each other , have d momentum then it is the same in any frame.

Edited August 20, 20232 yr by DimaMazin

11 minutes ago, DimaMazin said:

When travelers ,relative to each other , have d momentum then it is the same in any frame.

This statement does not make sense.

4 minutes ago, Genady said:

This statement does not make sense.

When they have equal masses.

4 minutes ago, DimaMazin said:

When they have equal masses.

It needs more clarifications.

9 hours ago, Genady said:

It needs more clarifications.

When you have got change of momentum dp then any observer,in any frame, defines  the your change of momentum as the same dp.

6 hours ago, DimaMazin said:

When you have got change of momentum dp then any observer,in any frame, defines  the your change of momentum as the same dp.

What does make you think so?

On 8/21/2023 at 12:39 PM, Genady said:

What does make you think so?

A very simple  refutation of Einstein's law of addition of velocities.

1 minute ago, DimaMazin said:

A very simple  refutation of Einstein's law of addition of velocities.

It is called "a wishful thinking."

Quote

Hawking, via Moontanman

“The greatest enemy of knowledge is not ignorance, but illusion of knowledge.” — Stephen Hawking

Hawking, via Moontanman,

 

his joke in the jokes thread is rather good too.

 

17 hours ago, Genady said:

It is called "a wishful thinking."

Yes, i mistaken.

The Einstein's law is incorrect because we cannot use the same module of reverse velocities in two frames. 😝