{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

PHY7A Lecture2 - Various Types of Energy(to be discussed...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Various Types of Energy (to be discussed this quarter) Some general terms for energies of macroscopic (large) objects 1. Internal energy (energies of the atoms making up the object) A. Thermal energy - the part of the internal energy of an object that increases as the temperature increases (i.e. energy of the “random motion” of all the molecules inside an object) B. Bond Energy - the part of the internal energy of an object that is left after the thermal energy is subtracted out C. Nuclear Energy - maybe talk about this later (really another type of bond energy)
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Some new types of energy systems to be discussed later today 2. Mechanical energies (energies of the entire object as a single unit) A. Kinetic energy - energy of motion of a single object B. Gravitational potential energy - energy that depends on the positions of two objects (usually the earth and some other object) C. Spring potential energy (really a kind of bond energy, the bonds bend but don’t break) - energy that depends on the positions of the two ends of a spring
Image of page 2
General method for energy conservation problems. 1) When you analyze a particular physical problem consisting of two interacting systems, you should begin by examining how the physical systems are changing and then use what you learn to decide which energies might be important in the problem. Possible changes: Change in physical system Energy system that is changing Temperature changes Thermal energy system Phase or chemical changes Bond energy system Speed of object changes
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern