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Physics : Recent Questions and Answers (Page 211)

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

Measuring the irradiance due to solar radiation with a pyranometer

Background informationI carried out an experiment where a pyranometer (on a flat surface) was used to measure the irradiance at the ground due to solar radiation over a range of...

Asked on 07/04/2021 by binaryfunt

1 answer

$mathcal{L}_{I}^{C C} $ global $U(1)$ invariance

It is well known that the SM lagrangian has the $U(1)$ symmetry. Considering for the moment the global symmetry $U(1)$, I am having some trouble seeing it in...

Asked on 07/04/2021 by Johnpiton

1 answer

If the velocity of an object is decreasing at a constant rate, does it mean that it's a uniformly accelerated motion?

If the velocity is constantly decreasing from $u$ to $v$ so is it uniformly accelerated motion?...

Asked on 07/04/2021 by khan Abdullah

1 answer

Change in velocity of liquid without pressure difference?

Let us assume a perfectly ideal fluid in a narrow enough pipe (as to ignore the pressure in the fluid due to its height) kept on a horizontal level. We...

Asked on 07/04/2021 by alphagamma

1 answer

How there can be an explicit coordinate dependence on the Lagrangian, if this arises from a Lagrangian density?

I have a very simple question, but strangely I cannot find any answer on the internet; maybe the answer is too simple that I don't notice. I go straight to...

Asked on 07/04/2021

1 answer

Questions About Implementing Rotational Kinematics in a Game

I'm making a videogame where the player controls a spaceship in a 3d environment, but the catch is the physics are realistic. The thing is, I'm struggling with 3d rotational...

Asked on 07/04/2021

1 answer

Why did a lack of electrical power generated in Texas recently almost cause fires?

This may be more of an engineering problem... A recent newspaper article stated that the rolling blackouts instituted during the recent cold snap in Texas narrowly averted parts of their...

Asked on 07/04/2021 by Kieran Mullen

0 answer

Total work done on a satellite

I have a question about the concept of work in relation to conservative and non-conservative forces. Is Total work done $=$ change in kinetic energy or change in total...

Asked on 07/04/2021

3 answer

Form of Energy in Compressed Gas

What would be the best way to categorize the energy stored in a compressed gas? Should I call elastic potential energy? Maybe mechanical? It's not that exotic a way...

Asked on 07/04/2021 by M. Enns

1 answer

Aren't Black Holes Just Neutron/Quark Stars?

Disclaimer:My understanding of general relativity is rudimentary at best, so bare with me and correct me where necessary. Also, any math in the explanation is appreciated, but try to also...

Asked on 07/04/2021

2 answer

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