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For a certain fluid flow problem it is known that both the Froude number and the Weber number are important dimensionless parameters. If the problem is to be studied by using a 1:15 scale model, determine the required surface tension scale if the density scale is equal to 1. The model and prototype operate in the same gravitational field.
Many ventilation systems maintain a slightly higher pressure in a building than the outside pressure. If the pressure in your room is 0.1 psi than the outside pressure will you be able to open the door? How much is this force compared to your weight?..
An initially empty cylinder is filled with air from 70 F, 15 psia until it is full. Assuming no heat transfer is the final temperature larger, equal to or smaller than 70 F? Does the final T depend on the size of the cylinder?
Find an exponential regression model for the data. Estimate (to the nearest billion) the annual expenditures in 2017.
What is a Hall-effect tachometer? Discuss the advantages and disadvantages of a Hall effect motion sensor in comparison with an optical motion sensor (e.g., an optical encoder).
For any precipitation-hardened alloy, like an al-cu alloy, the strengthening of the alloy depends on the size and number of the precipitates. Calculate the cross-sectional area of a single 10-micron (10-5 m) diameter spherical precipitate. Determine ..
Assuming a coefficient of static friction equal to 0.2 at the common surface, find the maximum torque that may be transmitted by the flywheel without slippage.
a battery manufacturer guarantees that his batteries will last on average 3 years with a standard deviation of 1 year.
A closed system undergoes a process in which work is done on the system and the heat transfer Q occurs only at temperature Tb. For each case, determine whether the entropy change of the system is positive, negative, zero, or indeterminate.
a small kiln for firing ceramic products has inside dimensions 1 m wide 1 m high and 1.5 m deep. the walls are 50 cm
Write a complete program consisting of a Main Program and Subprogram (you choose which type, but there should be only one) that fulfills the following requirements.
gaseous nitrogen is exposed to one face of a pure iron plate at 715oc. the surface concentration of nitrogen is
Air at 600k flows with 3 kg/s into a heat exchanger and out at 100 C. How much (kg/s) water coming in at 100 KPA, 20 C can the air heat to the boiling point?
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