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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What three main observed phenomena are the strongest support for the "big bang" theory?
What will be an ideal response?
Terrestrials are small, rocky, and dense
a. True b. False Indicate whether the statement is true or false
The ionosphere reflects high frequency radio waves
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
(C) 94 MPa
(D) 98 MPa