What is the name of the fine soil particles deposited by rivers?

Silt is like a dust in terms of size. It is solid, water like rivers transport, and deposits it. It is mostly made up of minerals and rock particles. It is form due to erosion of rocks. Therefore, the fine soil particles deposited by rivers is called Silt.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr