Physics Questions, Problems & Solutions : TransWikia.com ~ Page 44

How to calculate the force of a fan?

Let's say that we want to build a helicopter, if we want it to hover in the air then the pushing force of it's fan must equal the force of...

Asked on 10/04/2021 by Azzam Alsharafi

3 answer

What would the collision between a (large) solid planet and a gas giant be like?

Assuming a Jupiter-like planet and an Earth-like planet (Except, say... half the mass of Jupiter), what would happen when the two collide?For clarification: What would the actual collision be...

Asked on 10/04/2021

6 answer

Force exerted on iron particle in a magnetic field

So when an iron particle is near a permanent magnet. We see that iron particles will be attracted to the magnet and the iron particle will experience a force directed...

Asked on 10/04/2021

1 answer

Flux inside the cavity of a conductor

Assume a perfectly spherical conductor with a spherical cavity inside it. Say we place a charge $+Q$, at the center of the cavity. It induces a charge $-Q$...

Asked on 10/04/2021 by Revanth N Rajan

2 answer

Intuition on why quantum hall effect?

I think I can understand hall effect using the right hand rule, the electrons experience lorentz force in the presence of a magnetic field but I don't get why...

Asked on 10/04/2021

1 answer

What is the Reynold's number of a plate moving through a fluid?

I read here that the equation of resistive drag $F = -bv$ can be used, assuming the particle is movingthrough a fluid at relatively slow speeds...

Asked on 10/04/2021

1 answer

Mechanical Energy Conservation (I have some problem in my basic concept)

A block of mass $2kg$ is kept at origin at $t=0$ and is having velocity $4{sqrt 5}$ m/s in positive x-direction. The only force on it is...

Asked on 10/04/2021

6 answer

What is the speed of the magnetic field?

There is an invisible magnetic field that pushes apart two repelling magnets What is the speed of that magnetic field?...

Asked on 10/04/2021 by jehovahsays

3 answer

Why did the apple fall from the tree, vis-à-vis the second law of thermodynamics?

Newton came up with gravity to explain apple falling from the tree, what would Gibbs have thought? The second law states that entropy of the universe, in general increases. This...

Asked on 10/04/2021

4 answer

Differences between $V_{ab}$, $Delta V$, $Delta V_{ab}$, $Delta V_a$ and $V_a$

$V$ is electric potential. From my understanding of these notationsbegin{align}V_{ab}&=V_a-V_bDelta V&=Delta V_{ab}=V_b-V_a;text{consider $ato b$}Delta V_a&=V_a=V_a-V_inftyend{align}Do I understand these correctly?...

Asked on 10/04/2021

1 answer

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