Awooden dowel has diameter of 1.2 cm . it floats in water with 0.4 cm of diameter above water determine density of watrer

The density of water will be 0.935 g/

Explanation:

It is sufficient to solve this as a 2D problem since the length of the dowel does not matter. Let p be the density of the dowel in g/cm^3, and take water density 1g/cm^{3}

The area of the whole circle is = 1.130

The angle from the center of the dowel to the two water line edges is

T = (2)arccos)

So the area exposed above water is sector minus triangle:

= 0.642 - 0.447

= 0.195

So, the weight of the dowel is balanced by the weight of water displaced:

1.130 p

= (1.130 - 0.195)

p = 0.935 g/

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.