E.P. 324.3    Winter 1996    Instructor: Dr. D. Steele

	Midterm Test #1    February 1, 1996	50 minutes

	Answer all questions.  Calculators may be used.


1. (5)	Calculate the maximum capillary rise of water (at 10  C) between

	two vertical glass plates spaced 0.50 mm apart.


2. (15)	A uniform disk of mass M and radius a is suspended so that it can 

	rotate freely about its own axis (with moment of inertia     ),

	with the plane of the disk a distance d from a large parallel 

	plate.  The space between the disk and the plate is filled with 

	a liquid of viscosity  .  Initially the disk is spinning with 

	angular velocity   .  Find its angular velocity a time t later. 

	Assume that the velocity gradient across the fluid is uniform.


3. (10)	The square gate shown is eccentrically pivoted so that it opens 

	automatically at a certain value of h.  What is that value in 

	terms of  ?


4. (10)	Is the block in this figure stable floating in the position 

	shown?  Show your calculations.


	Specific weight of water at 10  C = 9.81 kN/m .

	Surface tension of water = 0.073 N/m.

	Contact angle of water on glass = 0 .