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What physics does TG know?

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  • What physics does TG know?

    Hey guys, a couple of classmates and I are doing an extra-credit thing in physics. We came up with some physics related questions. Most questions have multiple answers, and don't get TOO serious. This is just a survey for physics credit <_<

    1. What is kinetic energy?

    2. What is the unit for frequency?

    3. Who came up with F=MA?

    4. Name one of Newton's 3 laws:

    5. What are the 3 primary colors?

    6. What is electrical current measured in?

    7. Name the 2 ways electronics can be connected in a circuit.

    Much appreciated!

    (I felt sandbox was the most appropriate location for this, but feel free to move it if not!)
    This is where I write words.

  • #2
    Re: What physics does TG know?

    Makes more sense to reply by PM so we don't influence each others answers. Enjoy.

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    • #3
      Re: What physics does TG know?

      Originally posted by superwacker View Post
      Hey guys, a couple of classmates and I are doing an extra-credit thing in physics. We came up with some physics related questions. Most questions have multiple answers, and don't get TOO serious. This is just a survey for physics credit <_<

      1. What is kinetic energy?
      KE = 0.5*mass*velocity^2
      2. What is the unit for frequency?
      Hertz
      3. Who came up with F=MA?
      Newton
      4. Name one of Newton's 3 laws:
      F=MA
      5. What are the 3 primary colors?
      Blue, Red, Green? or maybe yellow in place of green.
      6. What is electrical current measured in?
      Amperes
      7. Name the 2 ways electronics can be connected in a circuit.
      in series and in parallel
      Much appreciated!

      (I felt sandbox was the most appropriate location for this, but feel free to move it if not!)
      Answers in blue text.



      TacticalGamer TX LAN/BBQ Veteran

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      • #4
        Re: What physics does TG know?

        Originally posted by superwacker View Post
        5. What are the 3 primary colors?
        Transmissive (eg. TV phosphors) or reflective (eg. paper and ink)? The answer is rotated 60 degrees on the color wheel depending on which of these you're using. For the curious, the answer can be found here:

        http://en.wikipedia.org/wiki/Primary_color

        You can also find the reflective/subtractive answer on the side of the box for toner cartridges for color laser printers. ;)

        The answer for transmissive/additive is found by looking at the common TLA for color representation in computer programs, notably in HTML, where images are displayed on transmissive computer monitors.

        (I felt sandbox was the most appropriate location for this, but feel free to move it if not!)
        General would have been fine, I think.
        Dude, seriously, WHAT handkerchief?

        snooggums' density principal: "The more dense a population, the more dense a population."

        Iliana: "You're a great friend but if we're ever chased by zombies I'm tripping you."

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        • #5
          Re: What physics does TG know?

          Here's an advanced question for you:

          Name the transform that converts between time and frequency representations of a wave form.
          Dude, seriously, WHAT handkerchief?

          snooggums' density principal: "The more dense a population, the more dense a population."

          Iliana: "You're a great friend but if we're ever chased by zombies I'm tripping you."

          Comment


          • #6
            Re: What physics does TG know?

            Originally posted by ScratchMonkey View Post
            Here's an advanced question for you:

            Name the transform that converts between time and frequency representations of a wave form.
            Umm Umm Umm....banana?....I'm just guessing here...pink?...Fourier?

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            • #7
              Re: What physics does TG know?

              Originally posted by ScratchMonkey View Post
              Here's an advanced question for you:

              Name the transform that converts between time and frequency representations of a wave form.
              Fourier Transform (or FFT in digital systems) :P

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              • #8
                Re: What physics does TG know?

                I was gonna say Fourier Transform just because its the only Transform I know the name of. (Are there any others?) But I have no idea what one is or how to accomplish one. :)

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                • #9
                  Re: What physics does TG know?

                  time-domain plots a signal's amplitude versus time... this is what you see when you open a .WAV file in an editor:

                  amplitude
                  |
                  |
                  |
                  |
                  |-----1s------2s-----3s-------------> time


                  converting to frequency domain plots it against frequency:

                  amplitude
                  |
                  |
                  |
                  |
                  |-----1Hz------2Hz-----3Hz-------------> frequency



                  E.g: In the time domain, a sinewave with a single frequency looks... well like a sine-wave with it's amplitude rising and falling. Convert that in to the frequency domain (using the fourier transform), and you get a single spike of energy at whatever frequency the sinewave is at.

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                  • #10
                    Re: What physics does TG know?

                    Originally posted by Kerostasis View Post
                    I was gonna say Fourier Transform just because its the only Transform I know the name of. (Are there any others?) But I have no idea what one is or how to accomplish one. :)
                    There are all kinds of transforms and many many named ones. A transform very generally is an operator on functions that produce other functions. Some get named because they were discovered to make solving certain problems easier for us.

                    Some other transforms include the Laplace transform, the Hilbert transform, and the Hartley transform.

                    There are also a lot of named geometrical transformations that are applicable in physics--for instance the Lorentz transformation. I'm sure you're familiar with geometrical transformations like simple rotations and reflections.

                    I love physics. If I were better at math I would have gone to grad school for physics--maybe...

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                    • #11
                      Re: What physics does TG know?

                      http://xkcd.com/435/
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                      TacticalGamer TX LAN/BBQ Veteran:

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                      • #12
                        Re: What physics does TG know?

                        Maybe math is just applied logic.

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                        • #13
                          Re: What physics does TG know?

                          Whats potential energy and its two types?
                          |TG-6th|SirNerd

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                          • #14
                            Re: What physics does TG know?

                            gravitational and elastic...

                            and chemical?
                            Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -Albert Einstein
                            The two most common elements in the universe are Hydrogen and stupidity. -Harlan Ellison

                            If all else fails: "rm -rf /"

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                            • #15
                              Re: What physics does TG know?

                              ...and mechanical, electrostatic, heat, nuclear, and so on? I don't think these are types of potential energy. Just different sources of the potential energy.

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