We can see light between the approximate wavelengths of:
a. 400 nanometers and 750 nanometers.
b. 4 nanometers and 7.5 nanometers.
c. 4000 nanometers and 7500 nanometers.
d. 4000 nanometers and 7500 miles.
e. 40 nanometers and 750 nanometers.
a
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a. True b. False Indicate whether the statement is true or false
A composite beam of aluminum (Ea 5 72 GPa) and steel (Es 5 190 GPa) has a width b 5 25 mm and heights ha 5 42 mm and hs 5 68 mm, respectively. A bending moment is applied about the z axis resulting in a maximum stress in the aluminum of 55 MPa. The maximum stress in the steel is approximately:
(A) 86 MPa
(B) 90 MPa
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