Our solar system lies about how many light-years from the center of the nuclear bulge of the Milky Way?
a. 2400
b. 28,000
c. 110
d. 4.3
b
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Which of the following methods of decay does not result in an element different from that of the original parent nucleus?
a. alpha followed by negative beta followed by another negative beta b. alpha followed by beta c. alpha followed by gamma followed by another gamma d. alpha followed by positive beta followed by another positive beta
The more massive a star is, the longer it lives because it has more hydrogen to fuse into helium.
Answer the following statement true (T) or false (F)
A cubic meter of lead which weighs 105 N is submerged in water. The buoyant force acting on it is about
1) the weight of a cubic meter of water, 104 N 2) half the weight of lead, 1/2 × 105 N 3) the weight of lead, 105 N because 4) the block loses half its apparent weight when suspended in water. 5) the block displaces 105 N of water. 6) the volume of water displaced is one cubic meter.
What is the wavelength of light in water if it has a frequency of 7.8 1014 Hz?
What will be an ideal response?