Mr. Chen needs to find the height of a nearby tree. He measured the shadow of the tree to be 15 feet 9 inches at the same time his shadow was 3 feet. His height is 6 feet 2inches. How tall is the tree?
What will be an ideal response?
32 ft
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The armature or rotating member of a DC motor is a cylindrical ____ assembly mounted directly on the motor shaft.
a. iron b. carbon c. graphite d. steel
A piston-cylinder device initially contains 100 moles of an ideal gas at T = 353.15 K and P = 0.1 MPa. The ideal gas has CP* = (7/2)R. The ideal gas is compressed isothermally until its volume is half its initial volume. How much work was done on the gas?
A. No work was done because the temperature stayed constant throughout. B. 461. kJ C. -203. kJ D. 203. kJ E. Insufficient information to solve
Soil reaction indicates the degree of acidity or alkalinity in a soil
Indicate whether the statement is true or false
Precision fertilizer applications systems take into consideration the different fertility levels within an agricultural field and integrate the use of soil testing with ________
A) computer controlled variable rate spreaders B) computer mapping C) intensive soil sampling D) geo-positioning systems E) all of the above