Recent content by JazzCarrot

  1. J

    Galactic Rotation and Gas Clouds

    Homework Statement Two questions here, but it's mainly terminology I don't understand; 1(a). Calculate the proper motion of the Galactic Centre (GC) with respect to the sun (and measured relative to the ‘stationary’ distant galaxies and quasars) in units of arcsec/yr, assuming that the...
  2. J

    Jet Engine Sound Intensity Calculation with Absorption Effects

    Oops! Yeah should be the other way round. I'll correct that.
  3. J

    Jet Engine Sound Intensity Calculation with Absorption Effects

    Homework Statement I=\frac{p_{ave}}{4\pi r^{2}} is derived on the assumption that the transmitting medium does not absorb energy. It is known that the absorption of sound in dry results in a decrease in energy of about 8 dB/km. The intensity of sound at a distance of 120 m from a jet engine is...
  4. J

    Finding the Ratio of Initial Speed and Angular Speed for a Struck Snooker Ball

    Probably, my Mechanics Lecturer isn't the greatest at writing them. Awesome, I'll try it like that. Thanks!
  5. J

    Finding the Ratio of Initial Speed and Angular Speed for a Struck Snooker Ball

    So, we're playing snooker... Homework Statement A (uniform) snooker ball of radius r, at rest on a table, is struck by a cue at a point a distance h above the table. Assume the cue tip is traveling horizontally, in a plane through the centre of the ball. As a result, the ball begins to move...