What is the wavelength (angstroms) of a photon that has an energy of 5.69 10-17 J?
A) 454 angstroms
B) 34.9 angstroms
C) 6.89 1015 angstroms
D) 3.66 109 angstroms
E) 3.50 10-9 angstroms
Question 2
As a polymer becomes more crystalline, ________.
A) its melting point decreases
B) its density decreases
C) its stiffness decreases
D) its yield stress decreases
E) None of the above is correct.
