Recent content by aimslin22

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    Clarification on induced current/Bfields for solenoids

    I see. Thank you!
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    Clarification on induced current/Bfields for solenoids

    Homework Statement I'm working on induced currents/b-fields from Lenz's Laws and two different problems use the same equation but one has an extra variable and I don't know when to add this equation. Problem 1: In a physics laboratory experiment, a coil with 180 turns enclosing an area of...
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    Clarification on induced current/Bfields for solenoids

    Homework Statement I'm working on induced currents/b-fields from Lenz's Laws and two different problems use the same equation but one has an extra variable and I don't know when to add this equation. Problem 1: In a physics laboratory experiment, a coil with 180 turns enclosing an area of...
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    Thermodynamics govern reactions occur

    like the K constant?
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    Thermodynamics govern reactions occur

    Homework Statement What concepts from Thermodynamics govern whether reactions occur or not? Homework Equations The Attempt at a Solution Activation energy-need some source of energy to start it-like pressure or light. Entropy-but why? Anything else, I'm sure there is more...
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    How do moving electric fields create magnetic fields?

    a moving electric field does NOT become a magnetic field, it produces one due to magnetic flux. It's rather difficult to explain, so here are some links that might help: http://en.wikipedia.org/wiki/Flux#Electromagnetism http://en.wikipedia.org/wiki/Electromagnetic_induction...
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    Magnetic Fields - Extending Concepts

    Here is some more hints: Potential difference = voltage, and the definition of voltage is...? for the second problem, it looks right to me, but you're missing velocity and you have energy...so which equation uses both?
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    Angle of incidence, reflection, and refraction

    Homework Statement What are the difference among angle of incidence, reflection, and refraction when light strikes two parallel surfaces? What does it mean "light is incident on film"?-is that the angle of incidence? The Attempt at a Solution I know how to find all of...
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    Simple Harmonic Motion and pendulum clock

    I'm not sure... but doesn't the equation read F=-kx, but k is NOT dependent on g? couldn't the spring be sideways?
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    Batter hits a ball momentum problem

    m1v1=m2v2 impulse=F*change in time
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    Nuclear Physics, photons, electrons and positrons

    Looks good to me! Thank you!
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    Nuclear Physics, portons and neutrons

    Thanks so much!
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    Nuclear Physics, photons, electrons and positrons

    Homework Statement A photon of sufficient energy can spontaneously create an electron and positron. This will conserve charge and must conserve energy. What is the minimum energy photon (in MeV and J) that can create an electron-positron pair? Homework Equations V=W/q (?) The...
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    Nuclear Physics, portons and neutrons

    Homework Statement You have 10 protons and 10 neutrons to paly with (mass of oxygen = 15.994915) a. What is the mass of an oxygen nucleus that you build with equal numbers of protons and neutrons? b. What is the binding energy of this nucleus? Homework Equations E=mc^2...
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    Chemical energy in the runner's body

    I probably would have chosen kinetic as well, but thermal makes sense, because a lot of human's energy is wasted by becoming heat rather than kinetic.