What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen, 1.007 825 u; neutron, 1.008 665 u; helium, 4.002 602 u; also, 1 u = 931.5 MeV/c2)
a. 74.85 MeV added
b. 74.85 MeV given off
c. 28.30 MeV given off
d. 28.30 MeV added
c
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_____ is an example of a Terrestrial planet
A) Jupiter B) Saturn C) Mars D) Neptune
A copper wire is found to break when subjected to minimum tension of 36. N. If the wire diameter were half as great, we would expect the wire to break when subjected to a minimum tension of
A) 36. N B) 26. N C) 18 N D) 9.0 N E) 51. N
Single convex spherical mirrors produce images that
A) are always smaller than the actual object. B) are always larger than the actual object. C) are always the same size as the actual object. D) could be larger than, smaller than, or the same size as the actual object, depending on the placement of the object. E) are sometimes real.
A certain radio wave has a frequency of 1.03 MHz. What is the wavelength?