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Repeat Prob. 17-146 for helium.
Prob. 17-146
Air is heated as it flows sub sonically through a 10 cm 10 cm square duct. The properties of air at the inlet are maintained at Ma1 =0.4, P1 =400 kPa, and T1 =360 K at all times. Disregarding frictional losses, determine the highest rate of heat transfer to the air in the duct without affecting the inlet conditions.
Determine the highest BODu concentration possible in the effluent which can still achieve the permitted requirement of a DO greater than 5 mg/L year round.H =4 m (assume no change due to wastewater flow)
A natural deposit of soild was found to have water content of 20% and to be 90% saturated. What is the void ratio of the soil
A state legislator wishes to survey residents of her district tosee what proportion of the electorate is aware of her position on using state funds to pay for abortions. a)What sample size is necessary if the 95% Confident Interval
A 2500-lb car (CD = 0.35, Af = 25 ft^2, and ? = 0.002378 slugs/ft^3) has 14-inch-radius wheels, a drivetrain efficiency of 90%, an overall gear reduction ratio of 3.2 to 1, and drive axle slippage of 3.5%.
The flat circular disk rotates about a vertical axis through O with a slowly increasing angular velocity. Prior to rotation, each of the 0.60-kg sliding blocks has the position x = 29 mm with no force in its attached spring.
Consider a singly reinforced concrete beam with a base dimension of b= 12in and d=20in. Assume all bars are located in one row. Use Grade 60 steel and 5ksi concrete. Find the nominal flexural strength and the design strength for the following cases
Determine the most economical design (i.e. pipe size and number and location of pumps). Hint: Vary your pipe diameter and consider pumps in series.
For a concrete column that is part of a braced frame, if the column is square, tied, 18 inches per side, 16 feet long, classify the column as slender or non slender
Using a graphical approach, determine the optimal amount of Space Rays and Zappers that need to be produced in order to maximize profits every week. Describe the type of solution you obtained and clearly state your choice of decision variables, objec..
using stadia and inclined sights, the stadia top and bottom readings are 8.5ft and 6.21ft respectively, and the vertical angle is read as -8degress 42'. what is the horizontal distance.
A cylindrical tank 5-m in diameter is filled with water to 3-m depth. A very short horizontal pipe with 20-cm diameter and rotary valve is used to drain the tank from the bottom. How long does it take to drain the tank to 50%?
A pump of 80% efficiency lifts water from one large open tank to another; the difference in water surface elevations is 20 feet. The pipe is relatively smooth (f = 0.0122), and has 3 elbows, each with a loss coefficient of 2/3.
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