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231 posts
 
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Q&A Motion of charged particle inside a magnetic field

We have place a charged particle of 2C with mass 2kg, 1mm above a current-carrying wire of 1A.The charged particle has an initial velocity of 100m/s The magnetic field of the wire for simplicity w...

0 answers  ·  posted 3y ago by MissMulan‭  ·  edited 2y ago by MissMulan‭

66%
+2 −0
Q&A Prove differential form of Lagrangian

Let's first remember how you check that you are at an extremum (minimum, maximum, saddle point) of a normal differentiable function. You do so by checking that the first derivative is zero (plus fu...

posted 2y ago by celtschk‭  ·  edited 2y ago by celtschk‭

Answer
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Q&A Should Earth's moon colonies being deep underground ensure natural heating?

Should Earth's moon colonies being deep underground ensure natural heating? By natural I mean "non artificial" i.e. not from "artificial" air conditioning. The question is based on the thought th...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Dave Tweed‭

Question Moon
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Problems Slipping and rotation

A disk of mass $M$ and radius $R$ is initially rotating at angular velocity of $\omega$. While rotating, it is placed on a horizontal surface whose coefficient of friction is $\mu=0.5$. How long ...

1 answer  ·  posted 3y ago by deleted user  ·  edited 2y ago by deleted user

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Q&A If planet 9 exists, is it correct to say that it is a "dark planet"?

Planet 9 would certainly be "dim", but whether it would be dark according you your definition is impossible to say. Planet 9 needs to be smaller or further away than Pluto, otherwise its gravitati...

posted 3y ago by Olin Lathrop‭

Answer
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Problems Find initial velocity when a stuntman jump from $1.25 \ m$ height

The method is correct. when you write $s=vt$, $s$ is the horizontal distance and $v$ is the horizontal component of the initial velocity (and it happens to be that the initial velocity has only ...

posted 2y ago by deleted user

Answer
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Q&A Why should there not be water below 6kms in the Earths crust?

In 1970, the USSR began drilling at the Kola Super-deep Borehole. The target depth was 15,000 meters; The stated areas of study were the deep structure of the Baltic Shield, seismic discontinuit...

0 answers  ·  posted 3y ago by Conrado‭  ·  edited 3y ago by Conrado‭

Question pressure
62%
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Meta What should our policy be toward rudeness?

From my perspective, I can only agree that rudeness isn't exactly ideal. In general, if someone's being needlessly rude or aggressive etc., editing/suggesting an edit that improves the post is a g...

posted 3y ago by Mithrandir24601‭

Answer
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Meta Book suggestion category proposal

I was thinking for a new category called Book suggestion (not only book suggestion either). Usually, most of Science students like to study Science books (their favorite subject) by themselves. Som...

2 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by dmckee‭

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Problems Delta to Wye conversion

I have a circuit like this. And, I want to calculate resistance from here. I was following these steps. I was calculating resistance for left side circuit. $$R_1=\frac{2 × 2}{2+2+4}=0.5\Omega$$...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Olin Lathrop‭

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Meta Is "homework-and-exercises" off-topic in Codidact?

In SE sites, homework-and-exercises question isn't allowed in Physics SE. So, I want to know does Codidact also mark home-and-exercises question as off-topic? I have earlier asked twice question on...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Mithrandir24601‭

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Q&A What happens if an electron collides with a proton?

While electrons have positive and protons have negative charge. They should collide and vanish, shouldn't they? No. They have other attributes than just being packets of charge. You have to cons...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A Would we need Alternating Current if superconducting wires existed?

The major advantage of Alternating Current is that it can be transmitted to large distances without significant losses, which is not possible in Direct Current. Had economical superconducting wire...

2 answers  ·  posted 3y ago by theabbie‭  ·  last activity 3y ago by celtschk‭

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Meta showing a downvote in statistics while I haven't got any downvote

In my Physics Codidact profile I am getting that I got 1 downvotes. I am not sure if I asked a question earlier in which I got 1 downvotes. In my current posts I don't have any downvotes or upvot...

1 answer  ·  posted 3y ago by deleted user  ·  edited 2y ago by deleted user

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Problems Find equation of motion using. Lagrangian given equation is $L'=\frac{m}{2}(a\dot{x}^2+2b\dot{x}{y}+c\dot{y}^2)-\frac{k}{2}(ax^2+2bxy+cy^2)$

$$L'=\frac{m}{2}(a\dot{x}^2+2b\dot{x}{y}+c\dot{y}^2)-\frac{k}{2}(ax^2+2bxy+cy^2)$$where a, b, and c are arbitrary constants but subject to the condition that $b^2 − ac \ne 0$. What are the equat...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by celtschk‭

60%
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Q&A Signal modeling as only digital, only analogue, or as both

If a signal has a analog component then it analog regardless of if it has a digital component.

posted 2y ago by MissMulan‭

Answer
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Q&A Signal modeling as only digital, only analogue, or as both

In signal processing, are signals modeled in only one way (digitally or analogously) or are there some signals which can be modeled in both ways?

3 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by Lundin‭

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Q&A Find jerk of time varying force

This gravitational field we move inside has some distance L after which it becomes 0.Before L it is just like any gravitational field. Suppose we move inside that gravitational field.The accelerat...

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by Mithrandir24601‭

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Q&A What is the meaning that the universe is flat?

The universe could possibly wrap back onto itself, or it could be in infinite flat space. Imagine the difference between being on an infinite plane, or on the surface of a large sphere. In both o...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

Answer
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Q&A What happens if an electron collides with another electron?

We know that electrons always repel electrons. But, if somehow they collide, then what will happen? I found a related question of above one in Quora. An incoming electron can instead make them ...

0 answers  ·  posted 2y ago by deleted user

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Meta Why ability doesn't show in every users profile?

Why abilities don't show in every user page? Take a look at @Mithrandir's profile according to his profile he doesn't have any ability. But, I don't think that he doesn't have ability. I was checki...

1 answer  ·  posted 2y ago by deleted user  ·  edited 2y ago by Monica Cellio‭

60%
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Meta Question is showing closed instead of last_activity or reopened

Magic.. :D The question was reopened but, showing closed instead of reopened (It should show last_activity according to code). question link

0 answers  ·  posted 2y ago by deleted user  ·  edited 2y ago by deleted user

Question bug post-lists
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Q&A Magnetic charges to solve interaction between 2 magnetic dipoles

Using imaginary magnetic charges (usually called magnetic monopoles) to solve for forces between two magnets doesn't make sense. Even if magnetic monopoles existed, what exactly do you envision do...

posted 3y ago by Olin Lathrop‭

Answer
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Q&A Superconductivity

In my notes from University the reason a material can exhibit superconducting properties is at really low temperatures electrons form Cooper pairs of which the electrons of the Cooper pairs have lo...

0 answers  ·  posted 2y ago by MissMulan‭

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Meta Why ability doesn't show in every users profile?

Edit: While this specific case isn't reproducible, there is a broader problem. This section is sometimes not showing up for people with moderator privileges, on some communities, and I don't yet k...

posted 2y ago by Monica Cellio‭  ·  edited 2y ago by Monica Cellio‭

Answer