Which of the following statements is an accurate description of sound transmission through various mediums? a. gases conduct sound better than liquids. b. elastic solids prevent sound from being transmitted better than liquids. c. sound insulators prevent sound from being transmitted better than elastic solids. d. inelastic materials conduct sound better than elastic solids.

C. Sound insulators prevent sound from being transmitted better than elastic solids

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