Answer:
Explanation:
Wave 1, 
Wave 2, 
Wave 3, 
Wave 4, 
The general equation of travelling wave is given by :
The value of 
will remain the same if we take phase difference into account.
For first wave,
For second wave,
For the third wave,
For the fourth wave,
It is clear from above calculations that waves 1 and 3 have same time period. Also, wave 2 and 4 have same time period. Hence, this is the required solution.
Two types of fingerprints are
.1. arches
2. loopes
True ( I think ) ............................
The components of the ball's position 
at time 
are
The ball stops 18.0 m from where it began, so that
From the second equation, we can show that the ball travels for about 
seconds, which means it was initially thrown with a horizontal velocity of
