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Physics : Recent Questions and Answers (Page 570)

Find answers to your questions about Physics or help others by answering their Physics questions.

Is there a Newton-like equation for gravity that gives equivalent results to that of general relatively?

It seems like you might be able to create a time dependent version of Newton's law of gravity. Perhaps it would also require terms for non-radial dimensions along with time....

Asked on 02/12/2021

1 answer

Variable mass system confusion

Let's say we have an open box with mass $ m_{b}$ and velocity $u_{b}$. If it is raining and the box is being filled with water its mass...

Asked on 02/12/2021 by user285949

2 answer

When do quantum mechanics effects become important in this case?

Consider a free electron with energy E in a metal. At which energy do the quantum mechanics effects become important? When should I consider the electron as a wave and...

Asked on 02/12/2021

1 answer

How does a Foucault pendulum work?

How exactly does a Foucault pendulum work? The usual explanation says that the plane of the oscillation of the pendulum is fixed while the earth rotates underneath. On Wikipedia, there...

Asked on 02/12/2021

2 answer

Errors in conservation of energy equation of a falling stick

I have been trying to write out a conservation of energy equation of a falling stick (at an angle $theta$ to the horizontal) at the instant of its bounce....

Asked on 02/12/2021

1 answer

Fermi's guess at the Beta Decay Hamiltonian

Just started on Walter Greiner and Berndt Müller's book on the Weak Interaction. He says that Fermi guessed the Hamiltonian for Beta Decay to be: $$H_F = H_n^0...

Asked on 02/12/2021

1 answer

Why is it easier to carry a person while spinning than not spinning?

I was carrying my friend around the other day when I was spinning her she was light but when not spinning her and just carrying her around she was heavy,...

Asked on 02/12/2021

11 answer

Why are only some eigenstates observed upon collapse?

If we have a system in a superposition of states, we expect that observation would collapse the wave-function to one state. But many eigenstates can be expressed as a superposition...

Asked on 02/12/2021

3 answer

Is wearing an insulated metal armor against a lightning safe?

Related: Is wearing metal armor during lightning safe? only partially answer my question. During a discussion in my question in Worldbuilding, this answer explain that as long...

Asked on 02/12/2021 by Vylix

1 answer

How should I interpret this relativity scenario?

I am having a bit of trouble understanding the point of the following relativity scenario.Imagine two freely floating rockets (side by side) of height $L$ in outer space....

Asked on 02/12/2021

3 answer

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