# All Questions

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### Motion of parallel-incoming particles in gravitational field [on hold]

There is a large parallel beam of incoming particles with mass $m$ and uniform velocity $v_0$ ($v_0 \ll c)$ in the presence of a gravitational field of a (spherical) planet with mass $M$ and radius ...
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### anatomy of combustion

I don't understand how energy is released in combustion. We have a reaction of a combustible material with oxygen and this releases energy. In what form is this energy released? It should be some ...
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### Force on a charged particle due to an uncharged infinite conducting plate

How can I calculate the force on a charged particle due to an uncharged infinite conducting plate? If there is a small object with positive charge placed above a metal plate, the object induces a ...
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### Why does emf of a cell equal to $\frac{F_b d}{q}\;?$

In Concepts of Physics by H.C.Verma, it is written: Some internal mechanism exerts forces on the charges of the battery material. ... We show the force on a positive charge $q$ as $\vec F_b\; .$ ...