You drop a rock in a pond and observe a wave propagating on the surface of the pond. how can you estimate the frequency, speed, and wavelength of the wave?

Explained

Explanation:

When we drop a rock in the pond, it creates a variety of wavelength in it. Among the the most dominant are waves due to surface tension and waves due to gravity. Because of the combined effect of both gravity and surface tension, there is critical wavelength that travel the most slowly than any other wave. The critical wavelength is about 1.7 cm for the water in lake on earth. So, looking at the ripples or the expanding circles we can say that their wavelength would be 1.7 cm.  

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s