Recent content by ezadam

Yeah I somehow pushed myself to understand it :) It's just that it's the first time that in a physics/mechanics course, I am exposed to a such an explicit expression of the effect of inertia on the kinematics of a certain body. Thanks for your help !

Thanks for the reply tiny-tim :) The fact that in an inertial frame, \ddot{r} is positive is what bothers me ... How can the block, physically speaking, move if there is no force responsible for its radial motion ? I understand your point mathematically but I still have some trouble...

Hey guys, I am having some problems with the concept of inertial/non-inertial frames of reference and their applications in engineering dynamics. So I've learned that a given frame of reference is defined to be non-inertial when something in the studied system can only be explained through...

Thank you so much for your answer. Is a linear relationship expected between the actual power consumption and the temperature that I set on the hot plate ?

Hey Guys, I really did my best to locate the best sub-forum for my question (I was hesitating between the Homework one and this one), so please bear with me if my choice is wrong ... Now to my question: So in my kitchen, I have a hot plate appliance, and it says on it that power...

Homework Statement So in the context of a practical project, I am tasked with selecting an appropriate hot plate with a specific power rating able to evaporate 1 kg of water in an hour, from a container that initially contains 3 kg of water. Homework Equations - P = Q/Δt - Q = mcwaterΔT...

Thank you so much guys, I just re-read Pascal's law and confirmed to myself that pression actually acts equally in all directions. Problem solved !

SteamKing, Sorry my bad. When I said , I actually meant "with a vertical interface". Here's an image of the kind of dam I am talking about. I thought that since the weight of the water (in red) is parrallel to the water-dam contact surface (in green), then the water has no effect on it and...

Hey guys, So I have just learned that the formula for a fluid's hydrostatic pressure (let's say water for the purpose of simplification) in terms of depth is: P = ρ * g * h Now I have been reading a bit on my textbook and I found out that the derivation of this formula is based on the...

That's why I was talking about a neutral conductor. In neutral conductors, free electrons rearrange themselves in a way that cancels the external electric field, thus total field inside a conductor is 0. About current-carrying conductors, I don't know as I had specified ...

Naty1, are you sure that you are not talking about the magnetic field created around the wire ? I think that's where the right-hand rule applies. I am talking about a possible external electric field created by a wire. You are right about the fact that external fields do not affect the total...

But isn't the current that's flowing into its positive terminal the difference between part of I2 that went through the branch and the 4 V's battery's current ? If this is correct, then calculating the 4 V battery's power means that we need to use the battery's own current I'm really sorry...

Thanks I like Serena :biggrin: ! Before I was into Openstudy.com but their forum community cannot be compared at all to the one here at PF. I am sure I'll be learning a lot from this place :smile: I understand your explanations. Even assuming the existence of an internal resistance r for the...

A simple electric circuit (such as one composed of a battery with Emf V and resistor with resistance R) is in an electrodynamic state since the battery's potential difference creates an electric field in the circuit's wires, which in turn moves charges around. So potential difference in wires is...

Yes you are totally right, but that absorbed energy is a net energy. In other words, the 15 V battery provides a large amount energy, part of it gets dissipated in the resistors, but the remainder of this energy is still larger than the energy in the 4-volt energy in magnitude. The fact that...