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an operator is holding a tool for a horizontal drilling task. the woman's elbow is flexed 45 degrees. The length of her forearm is 0.4m and the drill has mass of 5kg. Her forearm/hand weighs 20N and its center of mass is half the distance between the tool and the joint center.
a) what is the reaction force at the joint? be sure to draw and label the free body diagram of the system.
b) qualitatively describe how the muscle force would change if the elbow was flexed 90 degrees from vertical?
The two cylinder containers are joined by bolting their flanges together. How many 1-inch diameter steel bolts are required to hold the cylinders together when the assembly is subjected to an internal pressure of 200 psi
A motorcyclist travels around a curved path that has a radius of 200 . While traveling around the curved path, the motorcyclist increases speed by 1.25 . If the motorcyclist starts from rest, determine the time needed to reach an acceleration of 5...
The average unit weight of this soil is 118 lb/ft^3, and the average moisture content is 9.6%. It also has a maximum dry unit weight of 122 lb/ft^3 and an optimum moisture content of 11.1%
determine the maximum wind load that the cavity wall , bothe wythes are fully grouted but unreinforced ,and type S mortar portland cement is used . prism strength is equal to 2666psi for the concrete block wythe and 5333 psi for the brick wythe.
Briefly explain the purpose of the International Space Station, and list the name of all space agencies involved in building and operating it.
the stress at a point is shown on the element. Determine the principal stresses and the absolute maximum shear stress.
If, on 8/1/2019, 3-year municipal bonds with an AA- rating and a coupon rate of 6.50% (payable semiannually) are selling for $100.00, what would be the fair market value of the 300 Whittier bonds (not including the 8/1/2019 coupon payment)
A 100 ft cut steel tape was used to measure between two property markers. The rear surveyor held 93 ft, while the head surveyor cut .67ft. What was the distance between the markers
Determine the degree of saturation of a sample of soil given that its maximum dry unit weight is 18 kN/m^3 and its optimum moisture content is 12.1%. Assume the Specific Gravity of soil is 2.65.
Explain how the desert air can contain much more h 2 o vapor in the air than the pole, and still a lower humidity than the pole? what causes the difference between dry and moist lapse rate?
The telescope of the instrument is 5.25 ft above the ground station, whose elevation is 415.65 ft. What is the elevation of the tip of the spire? (Ignore atmospheric refraction and earth curvature)
It is desired to compare the results of property predictions for water near or in the saturation region using (a) the ideal gas equation, (b) the compressibility chart and (c) the steam tables.
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