(Q).
Q: Destructive interference in waves occurs when what things overlap? Choices: - two waves - three waves - three troughs - two troughs A:
(A).
two troughs

(Q).
Q: Elements are either metals, nonmetals, or what? Choices: - reactive metals - partial metals - unstable metals - semimetals A:
(A).
semimetals

(Q).
Q: Which law explains why a ship weighing thousands of metric tons floats on water? Choices: - hofstadter ' law - ganymede ' law - water pressure law - archimedes' law A:
(A).
archimedes' law