# All Questions

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### The use of Artificial Intelligence in physics resarch

I have been reading about a machine that observed a double pendulum and created equations that both described its motion and associated conservation laws. The authors claims: We have developed a ...
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### Why work is negative if only direction of x-component of force is reversed but magnitude remains positive?

When a vector is negative, its magnitude remains positive and direction is reversed. When $270>\theta>90$ between $\vec{F}$ and $\vec{S}$, the direction of x-component of force vector i.e. ...
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### Boundary conditions of stream function

I have to do an problem about solving numerically the flow that goes under an airfoil. The airfoil has a flap deployed downwards and I need to solve the mesh that it's under the airfoil. I have drawn ...
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### How do I calculate the right ascension of the points along the ecliptic at given elevations?

How do I calculate the right ascension of the point along the ecliptic nearest the sun at sunset and sunrise that is at a given altitude/elevation? For example, I'd like to compute the right ...
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### Is it acceptable to base a physical theory on a philosophical idea?

Are theories that are based on the philosophy acceptable in Physics? If the theory is based on the philosophy that obtained from laboratory experiments, can it be accepted?
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### Waves and sounds

A tuning fork whose natural frequency is 440 Hz is placed just above the open end of a tube that contains water.The water is slowly drained from the tube while the tuning fork remains in place and ...
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### Drag versus centripetal force

I'm trying to see how extensive a gaming engine's physics are. Consider a spinning disc with a box on it which is free to spin around a vertical pole connecting it to the disc. The pole is more ...
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### Will microwaves interfere with data transfered through fiber optics?

Do fiber optical cables used for broadband signals of Internet get any interference due to any nearby microwaves generated in mobile phones? I learned that fiber optics are used to transmit data in ...
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### How do we force a turbulent fluid to keep the input energy rate equal to energy dissipation rate?

If I want to do a DNS (direct numerical simulation) for turbulent fluid, and I know $\nu$, how can I add an external force so that the input energy rate is equal to the energy dissipation rate? If ...
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