HOMEWORK ASSIGNMENT #2
ME 303 FLUID DYNAMICS/ WESTPHAL/ WSU/ FALL 2000
Due: Tuesday 9/19/2000 IN CLASS (submit at the conclusion
of class)
If you must FAX, use FAX number (509)372-7471 (dial 27471 from any WSU campus FAX machine) -- you may use the FAX cover or any other cover
page that has "ME 303 R. WESTPHAL" written on it
- Follow the Homework Guidelines for preparing
your submission. REMEMBER TO PROVIDE THE DISCUSSION UNLESS EXPLICITLY INSTRUCTED TO OMIT IT.
- You are encouraged to work together with other students,
but the work you submit cannot be a machine-produced duplication
of another student's work - it must be an original, but can represent
your version of a collaborative effort.
- Late work not accepted!
- Be CAREFUL with your freebody diagrams!
The assignment consists of the problems given below. Numbered problems refer to your
textbook.
- 3.8 DISCUSSION: How does the simple device shown differ from a real hydraulic jack?
- 3.27 OMIT DISCUSSION.
- Calculate the gauge pressure at point A indicated by the "slant tube" manometer shown
if it is filled with an oil of specific
gravity 0.82. DIAGRAM Give your result in units of
inches of water gauge as well as psig. Neglect surface tension. DISCUSSION: Why might it make
sense to use oil instead of water as the manometer fluid?
- 3.47 Give your result as a gauge pressure. OMIT DISCUSSION.
- 3.68 OMIT DISCUSSION.
- 3.81 Also give the resultant pressure load on the valve. DISCUSSION: What happens to the torque if the water depth increases beyond 30 ft?
- 3.90 OMIT DISCUSSION.
- 3.123 Note: this is a hemispherical metal dome with a cylindrical pipe attached to
its top. OMIT DISCUSSION.
- 3.106 This is a classic brain teaser involving the principles of buoyancy and floatation.
You could easily do an experiment, perhaps with a glass bowl of water, a paper cup, and
a heavy bolt. See whether the "bathtub ring" goes up or down when the "anchor" (bolt)
is tossed overboard. DISCUSSION: Does the result from your analysis accord with your intuition?
- 3.117 Note: do NOT neglect the weight of the balloon skin or the helium!
DISCUSSION: Would it be cheaper to use hydrogen gas rather than
helium, given that hydrogen costs less per pound?
- 3.132 OMIT DISCUSSION.
