Final answer:
Waves can superimpose regardless of frequency, amplitudes can influence each other even when not aligned, and both constructive and destructive interferences are types of wave interference. A pebble in water does create a pulse wave, and wave-particle duality is not applicable to macroscopic objects. The amplitudes of waves can add up regardless of their propagation direction.
Step-by-step explanation:
Understanding Wave Interactions and Properties
Superposition of Waves with Different Frequencies:
The statement that waves can superimpose if their frequencies are different is true. When two waves meet, they superpose on each other, creating a new wave pattern. This phenomenon is known as the principle of superposition and occurs regardless of whether the waves have the same or different frequencies.
Amplitude and Alignment of Waves:
The statement that the amplitude of one wave is affected by the amplitude of another wave only when they are precisely aligned is false. Regardless of their alignment, when two waves intersect, their amplitudes influence each other, which can lead to constructive or destructive interference.
Constructive and Destructive Interference:
It is true that the two types of interference are constructive and destructive interferences. Constructive interference occurs when wave crests overlap, increasing the resulting wave's amplitude, while destructive interference occurs when a crest meets a trough, reducing or canceling out the amplitudes.
Pulse Wave Example:
A pebble dropped in water creating ripples is an example of a pulse wave, making the statement true. A pulse wave is a single disturbance moving through a medium, exactly what occurs when a pebble disturbs the water's surface.
Wave-Particle Duality on Macroscopic Scale:
Wave-particle duality is a fundamental concept of quantum mechanics that does not exist for objects on the macroscopic scale, which means the statement is false. Macroscopic objects do not exhibit wave-particle duality, which is a behavior found in particles like photons and electrons.
Amplitudes of Propagating Waves:
The statement that amplitudes of waves add up only if they are propagating in the same line is false. Waves can interfere and their amplitudes can add up or cancel out when they meet, regardless of their propagation direction.