Physics Questions, Problems & Solutions : TransWikia.com ~ Page 626

Is the "efficiency" of car brake affected by how much force is applied by the brake?

Someone argues with me that stepping on a car's brakes for long periods of time will wear out the brakes faster than applying the brakes for short periods of time....

Asked on 01/24/2021

3 answer

Definition of "intensive" and "extensive" properties

Today I was asked what does it mean for a physical property of a system to be intensive. My first answer, loosely speaking, was:"It is a property that is local."I...

Asked on 01/24/2021 by pppqqq

1 answer

Amount of energy that can be stored from Faraday flashlight / linear alternator?

You'll have to forgive me if this question is either extremely elementary or does not make sense — I am a civil engineer with little E/M physics background beyond high...

Asked on 01/24/2021 by Michael Aronson

2 answer

Charge distribution conductor in electric field

Surface charge density of a conductor at a particular region on its surface is inversely proportional to the radius of curvature at that region. But this is valid only when...

Asked on 01/24/2021 by Faham

0 answer

Hypothetically, why can't we wrap copper wires around car axles and turn them into electromagnets to help charge the batteries?

We already have a magnetic core, why can't we use it to recharge the batteries? The only problems I see with it are potentially wiping magnetic data, but doesn't the...

Asked on 01/24/2021

5 answer

If gravity were a "real" force, then how would I be able to tell if I'm falling or accelerating in space or on Earth?

Background: I think it would be helpful for laypersons like myself to understand how, in practice, a "real" force differs from a pseudo-force. Virtually all explanations (eg, on ...

Asked on 01/24/2021 by Arnon Weinberg

6 answer

What exactly is a Moiré potential in 2D materials?

Reading about 2D materials formed by transition metal dichalcogenides, I have seen that if you rotate one layer you form Moiré patterns. Apparently, these patterns produce a " Moiré potential...

Asked on 01/24/2021 by I_R

0 answer

Why is turbulence dissipation $epsilon$ defined this way?

When deriving the turbulence kinetic energy equation $k$ by taking the trace of Reynolds stress transport PDE, this term appears : $$ 2nu overline{frac{partial u'_i}{partial x_k}frac{partial u'_j}{partial x_k}}$$...

Asked on 01/23/2021

1 answer

How do we assign length to dimensions in string theory?

My current understanding of the variations of string theory includes the sentence "string theory needs (at least) 6 extra spatial dimensions to work, but because our observable universe consists of...

Asked on 01/23/2021 by Erfan Abedi

1 answer

Can you induce motion by changing magnetic field on a body which isn't magnetic?

In this video demonstration of Lenz's law, the narrator starts with a substance which doesn't respond to the magnetic field of a bar magnet yet when he...

Asked on 01/23/2021

1 answer

Ask a Question

Get help from others!

Physics : Recent Questions and Answers (Page 626)

Ask a Question