How many elements are essential for plant growth?
a. 3 c. 16
b. 10 d. 27
C
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If no specifications are available, the approximate pressures in most transmissions will be ________.
A) Neutral, park, and drive at idle: 100 to 120 PSI (690 -827 kPa) B) Neutral, park, and drive at idle: 50 to 60 PSI (350 to 400 kPa) C) Neutral, park, and drive at idle: 160 to 200 PSI (1100-1380 kPa) D) Neutral, park, and drive at idle: 120 to 160 PSI ( 827-1100kPa)
PROBLEM 3.57 At a time when rotation is prevented at the lower end of each shaft, a 50-N · m torque is applied to end A of shaft AB. Knowing that G = 77.2 GPa for both shafts, determine (a) the maximum shearing stress in shaft CD, (b) the angle of rotation at A.
Which of the following is not considered one of the five major factors influencing soil formation?
A) living organisms B) valence state C) climate D) topography E) native parent materials
Consider the duct system shown in the accompanying figure. Air flows through two 8- in.-by-10-in. ducts that merge into a 18-inch-by-14-inch duct. The average speed of the air in each of the 8 x 10 duct is 30 ft/s. What is the volume flow rate of air in the 18 × 14 duct? Express the volume flow rate in ft^3/s, ft^3/min, and m3/s. What is the average speed of air in the 18 ×14 duct?
