The length and width of a standard sheet of paper is measured, and then the area is found by calculation to be 93.500 in2 . The number of significant figures in the width measurement must be at least:
a. 5
c. 3
b. 4
d. 2
A
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For germanium at a tensile stress of 41 MPa and a temperature of 695°C, what is the primary creep mechanism? The shear modulus of germanium is 41 GPa.
What will be an ideal response?
The sum of two vectors of fixed magnitudes has the greatest magnitude when the angle between these two vectors is
A) 90° B) 180° C) 60° D) 0° E) 270°
An 800-MW electric power plant has an efficiency of 30%. It loses its waste heat in large cooling towers. Approximately how much waste heat (in MJ) is discharged to the atmosphere per second?
A. 1 200 B. 1 900 C. 800 D. 560 E. 240
A 1.8-kg block is projected up a rough 10° inclined plane. As the block slides up the incline, its acceleration is 3.8 m/s2 down the incline. What is the magnitude of the force of friction acting on the block?
A. 5.0 N B. 3.8 N C. 4.2 N D. 4.6 N E. 6.5 N