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Type: Posts; User: physic

1. ## Question: Physics: Question(s)

by physic
4
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576

### Net Force on such a rock must...

Net Force on such a rock must be:F_{net}=ma=mg_{earth}-\frac{1}{2}\rho v^2AC_dhttp://en.wikipedia.org/wiki/Terminal_speedhttp://en.wikipedia.org/wiki/N-body_problem
2. ## Question: Isn't fractional model of quarks electric charge wrong?

by physic
0
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400

### Isn't fractional model of quarks electric charge wrong?

According to ahmadreza estakhr model of quarks with integer electric charge, Up-type quarks have no electric charge (0), and only Down-type quarks could have electric charge of minus or plus one(-1...
3. ## Question: Electrcity and gravity

by physic
18
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1,013

### Neutron star - Wikipedia, the free encyclopedia...

Neutron star - Wikipedia, the free encyclopedia
4. ## Question: What is Mathematical Equation of Explosion?

by physic
1
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499

### What is Mathematical Equation of Explosion?

Is there a Mathematical equation for explosion, blast wave or shock wave?for example this is mathematical equation of weight W=mg what is mathematical equation of Explosion?
5. ## Question: Rate of an Iodine clock reaction.

by physic
1
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651

### Iodine clock reaction - Wikipedia, the free...

Iodine clock reaction - Wikipedia, the free encyclopedia
6. ## Question: Relativity

by physic
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385

### Lorentz Factor: \gamma=\frac{25}{10}Speed...

Lorentz Factor: \gamma=\frac{25}{10}Speed Parameter: \beta=\sqrt{1-\frac{1}{\gamma^2}}so\beta=\sqrt{1-\frac{100}{625}}=\sqrt{\frac{21}{25}}
7. ## Question: Ahmad Reza Estakhr Proved Albert Einstein Wrong, Didn't he?

by physic
3
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1,219

### Estakhr's law of the photoelectric effect is...

Estakhr's law of the photoelectric effect is Consistent with Quantum Mechanics and Schrödinger equation.Schrödinger equation - Wikipedia, the free encyclopedia, (Nobel prize in physics 1921 was...
8. ## Question: Ahmad Reza Estakhr Proved Albert Einstein Wrong, Didn't he?

by physic
3
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1,219

### Ahmad Reza Estakhr Proved Albert Einstein Wrong, Didn't he?

This is Einstein's law of the photoelectric effect: E=K_e+W,and This one is Estakhr's law of the photoelectric effect: \hat E\Psi=\hat H_e\Psi,\hat E\Psi=\frac...
9. ## Question: What was reference of Newton?

by physic
2
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359

### What was reference of Newton?

What was reference of Newton which led to Gravitational law?W=mg(Surely it was not an apple!)
10. ## Question: quadratic equation need to solve

by physic
3
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665

### http://en.wikipedia.org/wiki/Cramer's_rule...

http://en.wikipedia.org/wiki/Cramer's_rule Cramer's Rule
11. ## Question: Differential problems

by physic
0
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671

### differential problems

what is difference between (dx^2) and (dx)^2 and (d^2x)?

by physic
1
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621

### You need to know what is distance between you and...

You need to know what is distance between you and the tree too

by physic
1
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668

Yep!
14. ## Question: how do you factor for x intercepts

by physic
1
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500

### this is simple: ax^2+bx+c=0...

this is simple:
ax^2+bx+c=0
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}
15. ## Question: CauchySchwarz inequality for complex numbers

by physic
0
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1,068

### CauchySchwarz inequality for complex numbers

how we can proof CauchySchwarz inequality for these two complex numbers?
z=a+ib
w=c+id

in the case of triangle inequality
|z+w|\le |z|+|w|
16. ## Question: What is displacement and velocity?

by physic
3
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1,284

### this is all about initial velocity v_i final...

initial velocity v_i
final velosity v_f
acceleration constant a
time t
relation between them is
v_f=at+v_i
there are two types of displacement
velocity constant that is...
17. ## Question: How to find position and time for wave function

by physic
0
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618

### how to find position and time for wave function

this is wave function \Psi{(r,t)}=Ae^{i(kr-\omefa t)}
i know what is wave vector k and angular frequency \omega
but i don't know what r position ad time t means
18. ## Question: Wave function

by physic
1
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735

### wave function

this is simple of wave function:
\Psi{(\vec r, t)}=Ae^{i(\phi+\vec k .\vec r - \omega t)}

\Psi{(\vec r, t)}=A|\cos{(\phi+\vec k .\vec r - \omega t)}+i\sin{(\phi+\vec k .\vec r - \omega t)}|
i...
19. ## Question: Ask physics help

by physic
7
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1,043

### What happens when the liquid inside a wine glass...

What happens when the liquid inside a wine glass is more dense?
music note of glass will change
Will the frequency change? yes
20. ## Question: Fourier Transform Tricky Integral

by physic
1
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759

### Fourier Transform...

Fourier Transform
21. ## Question: A vector equation for a given straight line is r = (I + 3 j) + lambda(-i - j) a) sho

by physic
1
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743

### r = (i + 3 j) + \lambda(-i - j) question is not...

r = (i + 3 j) + \lambda(-i - j)
question is not clear!

by physic
1
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669

Summation
23. ## Question: solve each system of the equations by elimination

by physic
2
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536

### \frac {3}{4}y^2+ {\frac {7}{4}y-5=0

\frac {3}{4}y^2+ {\frac {7}{4}y-5=0
24. ## Question: solve each system of the equations by elimination

by physic
2
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536

### 3x y=15 4x-3y=7 xy=\frac {15}{3} xy=5 x=\frac...

3x y=15
4x-3y=7
xy=\frac {15}{3}
xy=5
x=\frac {7+3y}{4}
\frac {7+3y}{4}y=5
\frac {3y^2){4}+\frac {7y}{4}-5=0
a=\frac {3}{4}
b=\frac {7}{4}
c=-5
25. ## Question: Ask physics help

by physic
7
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1,043

### Tacoma Narrows Bridge (1940)...

Tacoma Narrows Bridge (1940)
26. ## Question: Ask physics help

by physic
7
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1,043

### Each object have a special music note , by...

Each object have a special music note , by playing sound at its resonance frequency you are able to play that note then you are able to break that object: Tacoma Narrows Bridge

But you are able...
27. ## Question: Ask physics help

by physic
7
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1,043

### This is all about Resonance...

Breaking a wine glass using resonance, oscillating a wine glass by playing sound at its resonance frequency.
28. ## Question: Is there any other ways to solve this natural logarithm

by physic
1
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918

### is there any other ways to solve this natural logarithm

is there any other ways to solve this natural logarithm: \ln {(a b)}
for example
\ln {ab}=\ln {a} \ln {b}
29. ## Question: make y the subject of the formula x=2^y

by physic
2
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1,393

### 2^y=x \to \log_2 {x}=y note: \log_2 {x}=\frac...

2^y=x \to \log_2 {x}=y
note: \log_2 {x}=\frac {\log_{10} {x}}{\log_{10} 2}
exaple: 3^2=9 \to \log_3 {9}=2
30. ## Question: Physics: Origin of all physical forces - Estakhr's Constant

by physic
2
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1,077

### F_G=\frac {GmM}{R^2}\to F_E=\frac...

F_G=\frac {GmM}{R^2}\to F_E=\frac {(\lim_{\beta\to 0} \underline B.\beta^3.\cancel {R^2})mM}{\cancel {R^2}}=\lim_{\beta\to 0}\underline B \beta^3 mM
this equation proof that Estakhr's Gravitational...
31. ## Question: Physics gravitation question

by physic
3
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773

### F_G=\frac {GmM}{R^2}

F_G=\frac {GmM}{R^2}
32. ## Question: Physics: Origin of all physical forces - Estakhr's Constant

by physic
2
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1,077

### According to Estakhr, Ahmad Reza (MG13 - Talk...

According to Estakhr, Ahmad Reza (MG13 - Talk detail)Title: Newton's universal gravitational constant actually is NOT constant. when the Newtonian constant of gravitation...
33. ## Question: Probability brain twister

by physic
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1,006

### A) 25% B) 50% C) 35% D) 25% there are 4 option...

A) 25% B) 50% C) 35% D) 25%
there are 4 option and 3 chance D=A
34. ## Question: Graph

by physic
3
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537

### When a body is moving uniformly in a straight...

When a body is moving uniformly in a straight line with a velocity of 5m/ s . How we can find grafically distance covered by it in 5 seconds!
35. ## Question: Newtons to Kilograms

by physic
2
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910

### F=m.a m\to kg a\to \frac {m}{s^2} F\to...

F=m.a
m\to kg
a\to \frac {m}{s^2}
F\to N(Newton=kg.\frac {m}{s^2}
F_N=20_kg.2_{\frac {m}{s^2}}
F=40 N
36. ## Question: Physics: Origin of all physical forces - Estakhr's Constant

by physic
2
Views
1,077

### physics: Origin of all physical forces - Estakhr's Constant

Only a few weeks ago I would challenge these theories based on the evidence we can find on social media.
"newton's universal gravitational constant actually is NOT constant"
newton's universal...
37. ## Question: Wave function

by physic
3
Views
783

### Thank you but I need answer too

Thank you but I need answer too
38. ## Question: Wave function

by physic
3
Views
783

### Thank you but I want answer of that relation too

Thank you but I want answer of that relation too
39. ## Question: Wave function

by physic
3
Views
783

### wave function

Wave_function is a probability amplitude in quantum mechanics describing the quantum state... etc

I want to know that what is answer of this relation :...
40. ## Question: Uncertainty on Operator

by physic
0
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386

### uncertainty on Operator

http://www.texify.com/img/\normalsize\!\langle\hat A\rangle.gif is the expectation value of http://www.texify.com/img/\normalsize\!\langle\hat A\rangle.gif

I don't know what means expectation...
41. ## Question: How to draw acceleration versus velocity graph when an object is falling?

by physic
6
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4,169

### $s=ut+\frac {1}{2}at^2$ this is displacement of...

$s=ut+\frac {1}{2}at^2$ this is displacement of an accelerated objects

by physic