Part I:

Units Applet:

Instructions

• Run this Applet
  While this may seem silly there is a point to it. The applet works by dragging either mass, length, or time into one of either the 4 boxes in the numerator, or the 4 boxes in the denominator.

  When you hit a real physical entity, that key word will appear. For instance if you drag length into the numerator and time into the denominator that will be meters/sec which is a velocity.

  Please record your answers in some text file and email that to the instructor. Use the symbol ^ to represent a superscript and the symbol _ to represent a subscript. So meters per second squared would then be written as m/s^2 .

  1. Using this method, determine the units that correspond to the following terms:

  Acceleration

  Force

  Pressure

  Energy

  Momentum Density

  Power

  2. The equation for the Universal Gravitational Force is given by:

  F_g = G(M₁ M₂)/R²

  M₁ = mass of object 1
  M₂ = mass of object 2
  R = distance between the two objects
  G = gravitational constant

  Using the units you derived previously for a Force. What must the units of G be?

  3. The ideal gas law can be expressed as

  Pressure = density x Temperature x K, where K is a constant of nature.

  Using the units you found for Pressure, what units must K be in?