An electron is confined in a one-dimensional box (an infinite well). Two adjacent allowed energies of the electron are 1.068 × 10-18 J and 1.352 × 10-18 J. What is the length of the box? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
A) 0.93 nm
B) 1.1 nm
C) 2.3 nm
D) 1.9 nm
D
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The modulus of _____________is the maximum strain energy that a material can absorb and then fully return when unloaded.
Fill in the blank(s) with the appropriate word(s).
Hereditary instructions for growth and development are carried in:
a. proteins b. carbohydrates c. DNA d. energy e. lipids
How much energy is radiated each second by one square meter of a star whose temperature is 10,000 K? Note: ? in the Stefan-Boltzmann law is equal to 
.
a.
5.67 × 1012 J
b.
5.67 × 108 J
c.
5.67 × 104 J
d.
300 nm
e.
300,000,000 nm
______ is a spacing technique that allows designers to squeeze or stretch text to fit in a specific amount of space.
A. Leading B. Tracking C. Kerning D. Indenting