If two vectors point in opposite directions, their cross product must be zero
A) True
B) False
Answer: A
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A composite volcano is formed by
A) successive flows of fluid basaltic lava. B) a mixture of rock and lava. C) alternating layers of lava, ash, and mud flow debris. D) the accumulation of ash, cinders, and rock debris.
) A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?
A) The light woman B) The heavy man C) Both should arrive at the same time. D) not enough information
In deriving the axial electric field for the ring-shaped charge distribution and the electric field from a long line of charge, the component perpendicular to the resulting field is zero because of what physical property?
A) only net charge is important B) positive and negative charges cancel C) superposition D) integration E) symmetry
When an electron in a hydrogen atom drops from the second to the first excited energy state it emits a bright red emission line called hydrogen alpha
Indicate whether the statement is true or false