What is an antinode?
a. The opposite of a node—in other words, the part of a standing wave that is moving.
b. The position on a standing wave moving with the smallest amplitude.
c. The position on a standing wave moving with the largest amplitude.
d. Any position on a standing wave where there is no movement.
e. The position on a standing wave moving with the largest frequency.
c
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At Titan, the lakes are made mostly of liquid
A) metallic hydrogen. B) nitrogen. C) carbon dioxide. D) methane. E) water.
Are electric fields made of material particles such as atoms, and how do we know?
A) Yes, because electric fields have energy and all forms of energy are associated with material particles. B) No, because electromagnetic waves are able to cross regions of empty space containing no material particles. C) Yes, because the forces exerted by electric fields are always exerted on material particles such as atoms. D) No, because electric fields are observed to exist even within protons, and protons are not material particles. E) Yes, because everything is made of atoms.
Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° south of east. Vector 
has a magnitude of 4.0 m and points 30° west of south. The resultant vector 
+ 
is given by
A. 7.2 m at an angle of 64° south of east. B. 3.3 m at an angle of 64° south of east. C. 9.8 m at an angle of 26° south of east. D. 9.8 m at an angle of 64° south of east. E. 3.3 m at an angle of 26° south of east.
A body of related and rigorously tested theories can be pieced together into a much larger description of nature called a hypothesis.
Indicate whether the statement is true or false.