Final answer:
A wave train is a series of waves that are generated in a regular pattern. It can be characterized by the number of waves, wavelength, amplitude, frequency, and speed.
Step-by-step explanation:
A wave train is a series of waves that are generated in a regular pattern. To answer the given questions about the wave train:
a) The number of waves in the wave train can be counted by observing the pattern of the waves.
b) The wavelength of the wave train can be measured by finding the horizontal distance between two consecutive crests or troughs.
c) The amplitude of the wave train can be measured by finding the vertical distance between the equilibrium position and the crest or trough.
d) The frequency of the wave train can be calculated by dividing the number of waves passing by the time taken.
e) The speed of the wave train can be calculated by multiplying the wavelength by the frequency.