1. H

    Conservation of energy

    A car was going up an inclined plane (6.00%) with v0 = 90.0km / h until the driver braked the car at point A, it was completely stopped at point B. The kinetic friction coefficient between the tires and the road is 0.538. Calculates the braking distance. This is the exercise and this is what I...
  2. R

    Question about relationship between Acceleration and Electric Potential

    Hi everyone. Im a Engineering student and i having doubts about this question: "What is the acceleration vector a(x,y,z) of a particle of mass m0 and charge q0 when there is a Potential vector V(x,y,z) = c0 x3 c1 + x-5 y5 z4 where 'c0' and 'c1' are constants." Well I started with the...
  3. B

    Definition of Gravitational Potential Energy

    Can anyone explain to me the definition of gravitational potential energy? I mean, i understand that it is 'the total work done in bringing a mass from infinity to the point' for any mass at a point, but it just seems too vague. For instance, why is it zero at infinity and negative nearer to the...
  4. U

    How does the magnetism creates difference of potential ?

    Hi, I was reading electronics and I have a perception in my mind that potential difference is created by making the difference of electric charges on both ends. Higher potential is what means that there is more negative charge (More Electrons) and lower potential means there is more positive...
  5. K

    Equation for chemical potential of pure substance. Unsure why this derives as it does

    Hello, I am new to this. I have attached a screenshot from a journal article which talks about deriving Fick's first law. My calculus is a little rusty, and I don't understand how equation 5 is derived from equation 4. I'd have a go, but I have little to offer. All I have to offer is...
  6. L

    The potential energy of born rigid body is a constant ?

    \ \ \ \ \ The sum of rest masses of a born rigid body consists of two parts: the potential energy of a born rigid body, and the actual particles or the material in the form of physical existence. \ \ \ \ \ For a born rigid body, there is no conversion between matter and energy. The actual...
  7. P

    An atom moves in a region where potential energy varies: calculating the new velocity

    Alright guys, I'm new here and to physics. I'm self-teaching physical chemistry and am starting with basic physics so I'm stuck on this: Consider an atom of mass m moving along the x direction with an initial position x1 and initial speed v1. If the atom moves for a time interval Δt in a...
  8. L

    Potential and kinetic energies.

    Do the equations of the potential (mgh) and kinetic energies (.5mv^2) represent a mass? Someone said that the pot and kin energies do not represent a mass. Maybe a physicists could explain if the potential and kinetic energies represent a mass.
  9. L

    Thermodynamic Potential

    Hello, I came across the Lagrange Transformation explaining the Thermodynamic Potential. Textbooks show, how the math is executed. Can someone explain the practical use of transforming the energies pdV and TdS into Vdp and TdS. Regards Lothar
  10. V

    Finding Charge given expression for Electric Potential

    Hi, I'm having some trouble with a problem I have regarding electric potential. I'm given the equation for the electric potential everywhere on the xy plane. V=(22/√((x+1.54)^2+y^2))-(38/√(x^2+(y-2.77)^2)) There are two particles which I need to find the charge and coordinates for. I...
  11. Y

    Vortex potential flow with gravity

    Hello everybody, I am studying the potential flow of a vortex and I have a question. Would be really nice if somebody could help out. Conceptually the vortex stream function is constant in z so the streamlines are perfect circles. I am not sure how to add gravity to this description. I...
  12. avito009

    kinetic energy= potential energy.

    Suppose an object is moving, so it has kinetic energy which is 10 joules. Now this object is at rest so does the potential energy equal 10 joules? So does that mean kinetic energy = potential energy when the object is at rest? This has to be the case if law of conservation of energy is true...
  13. avito009

    E=mc2 gives us potential energy.

    E=mc2+1/2 mv2 If we interpret this formula then as we know E= potential energy + kinetic energy. 1/2 mv2 gives us kinetic energy. So mc2 must be potential energy if the formula is correct. Is this right?
  14. C

    Computing Gravitational Potential Energy

    I am taking a physics class for non-physics majors. Q: As water descends from the top of a tall hydroelectric dam, its gravitational potential energy is converted to electric energy. How much gravitational potential energy is released when 900 kg of water descends 220 m to the generators...
  15. G

    Gravitational potential energy

    hi, everyone, i have no idea with question number 10, anyone have idea about this? Sent from my Lenovo A5000 using Tapatalk
  16. T

    About Conservation of Potential Energy

    Hi Colleagues, I copied a "thread" then extended it with a comment and questions. This is basic. I don't know the answers. Problem: A uniform 3.00 kg rope, 24.0 m long lies on the ground at the top of a vertical cliff. A mountain climber at the top lets down half of it to his partner to help...
  17. J

    Potential energy confusion

    Hi everyone, I have a Gravitational Potential energy problem that I thought was straightforward but the solution to the problem is not what I worked out and I don't understand why ? the problem is as follows - Problem A uniform 3.00 kg rope, 24.0 m long lies on the ground at the top of a...
  18. N

    Electrical Potential Difference Problem

    Hi, I was wondering if you guys can help me solve this homework problem my Professor assigned to me. Also, He made it clear that I cannot use the solution the textbook solution manual uses because its a graduate level technique. They use something called "Stanley number", in which you let...
  19. P

    Physical chemistry - nernst equilibrium potential

    Hey you all! I am taking a neuroscience class and am struggling with the Nernst equation. I am doing something wrong, because I never seem to get the answer right. Here is the question, and sorry if I am posting this in the wrong threads: Calculate the reversal potential of a...
  20. H

    Voltage & Current & Push & Force & Potential

    I’m trying to understand what voltage is. Getting confused. (i) Is voltage a FORCE that can give PUSH to coulombs to make them flow in a wire. That force is found in the power source e.g. battery? (ii) Is it a measure of how much energy can be transferred per coulomb to, say a light bulb...