A small object has charge Q. Charge q is removed from it and placed on a second small object. The two objects are placed 1 m apart. For the force that each object exerts on the other to be a maximum, q should be:
A) 2Q
B) Q
C) Q/2
D) Q/4
E) 0
C) Q/2
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What is the binding energy per nucleon of 197Au (atomic number = 79)? (The following information regarding atomic masses will be needed: 197Au, 196.966 543 u; hydrogen, 1.007 825 u; neutron, 1.008 665 u; also 1 u = 931.5 MeV/c2)
a. 931 MeV b. 745 MeV c. 7.92 MeV d. 1870 MeV
Without the greenhouse effect operating in our atmosphere
A) We would not have to worry about any warming problems in the future. B) Earth would have an average temperature of -23 degrees Celsius. C) The ice in the polar regions would have melted long ago. D) The ozone layer would not be weakening. E) The Earth would have become much more like Venus long ago.
Based on current scientific evidence, what is the likelihood that life on Earth was created by some omnipotent being?
A) very unlikely but not impossible B) impossible C) certain D) very likely
Of photons of red, yellow, green, and blue light, which photons have the least energy?
a. red b. blue c. green d. yellow