# All Questions

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### Liquid metallurgy [on hold]

I want to know more about liquid metallurgy? all i know it is a technique used for fabrication of material. Please help me if you know about this technique. Thank you.
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### How is a irreversible process (conventionally) represented on a $T-S$ plane and why cannot it be (really) represented?

A reversible process can be represented on a $T-S$ plane, and the area under the curve is the heat exchanged by the system. On $P-V$ plane a irreversible process is conventionally represented with a ...
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### Clarifications on Ampere's Law [on hold]

I have just learnt Ampere's Law, useful for calculating the magnetic field in situations having a high degree of symmetry. However, I have some conceptual doubts regarding it: Before I begin, I would ...
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### Is mass relative? [duplicate]

This question has to do with the relativistic mass of an object. I have been reading that as energy increases, so does mass to a much lesser extent, and that this applies to kinetic energy as well. ...
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### Melting aluminium foil in a microwave [on hold]

Is it possible to melt aluminium foil in a microwave? I have made a lot of shapes using aluminium foil, and i wish to melt then slightly Simple, is it possible in a simple microwave oven
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### Why haven't we created a material that is completely invisible to the human eye? [on hold]

From what I understand, If something was not reflecting photons in any direction, you could then see through it. If photons transfer into thermal energy could something very cold help? Could the ...
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### Orientation from acceleration?

I have an object that has a sensor attached on it. This sensor calculates the acceleration in all axis and angular acceleration in all axis(Keep the gravity force in mind). How can I get the Pitch, ...
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### What can shield a Ultrasonic Weapon? [on hold]

What can shield against a ULTRASONIC weapon? https://www.google.com/url?sa=t&source=web&rct=j&url=https://en.m.wikipedia.org/wiki/Sonic_weapon&ved=...
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### Firing Single Photon [on hold]

We know (or pretend to know) what will happen if we fire one photon at a time and let it pass through slit/slits. But what if we don't use slit/slits and fire photons one at a time at a screen? What ...
28 views

### Weak decay iff or if strangeness changes? [duplicate]

I know that for a decay if the strangeness changes then the decay is a weak decay because strangeness is conserved in both strong decays and electromagnetic decays. However, is it also true that if a ...
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### Electric Field of Bar [on hold]

Problem: Positive charge $+Q$ is distributed uniformly along the positive $x$ axis from $x = 0$ to $x = a$. Negative charge $-Q$ is distributed along the $-x$ axis from $x = 0$ to $x = -a$. A point ...