Two boys, Joe and Sam, who are searching for buried treasure start underneath the same tree. Joe walks 12 m east and then 12 m north, while Sam walks 15 m west and then 10 m south. Both boys then stop
Find the magnitude and direction of the vector from Sam to Joe. Express the direction of this vector by specifying the angle it makes with the west-to-east direction.
35 m at 39° north of east
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The neutral hydrogen atom consists of
a. one proton and one neutron. b. one proton. c. one proton, one neutron, and one electron. d. one proton and one electron. e. an isotope and an ion.
Suppose that the forces holding an atom in its position in a crystal are the same for two different monatomic solids, but the mass of an atom m is larger for solid B than for solid A. Which has the larger value of TE?
A. Solid A B. Solid B C. Both have about the same value of TE.
Neutron stars must have a mass smaller than the Chandrasekhar limit.
Answer the following statement true (T) or false (F)
The full Moon's apparent magnitude is
A) -1.4. B) -26.2. C) -12.5. D) +4.83. E) +12.7.