A rectangular plate in plane stress is subjected to normal stresses ?x and ?y and shear stress txy. Stress ?x is known to be 15 MPa, but ?y and txy are unknown. However, the normal stress is known to be 33 MPa at counterclockwise angles of 358 and 758 from the x axis. Based on this, the normal stress ?y on the element in the figure is approximately:
(A) 14 MPa
(B) 21 MPa
(C) 26 MPa
(D) 43 MPa
(C) 26 MPa
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A horizontal uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hanging from it at the 20-cm mark and a 0.30 kg mass hanging from it at the 60-cm mark. Determine the position on the meter stick at which one would hang a third mass of 0.60 kg to keep the meter stick balanced
a. 74 cm b. 70 cm c. 65 cm d. 86 cm e. 62 cm
In the solar neighborhood we can map the position of spiral arms by observation of objects that are determined to be relatively ________ in age
Fill in the blank(s) with correct word
An astronaut in a space suit has a total mass of 143.5 kg and is standing on a scale that reads in newtons inside an elevator. If the elevator accelerates upward at the rate of 1.8 m/s2, what does the scale read?
a. 703.2 N b. 1,406.3 N c. 882.3 N d. 1,664.6 N
How is any lead chloride in the sample removed in step 2?