The waves created by two speed boats in a lake interact to form larger waves. this is an example of: a. constructive interference. b. destructive interference. c. absorption d. transmission

The correct option is A.

Explanation:

Interference is a phenomenon in which there is superposition of the waves occur.

The amplitude of the result wave can be maximum and minimum.

When the resulting wave having maximum amplitude then interference is said to be constructive.

When the resulting wave having minimum amplitude then interference is said to be Destructive.

In the given problem, the waves created by two speed boats in a lake interact to form larger waves. Here, the amplitude of the resulting wave is larger. The constructive interference will occur. The resulting wave will not get absorb here. Therefore, the answer will not be absorption.

Therefore, the correct answer is A.

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

i would say