Help! but please do not answer if you are just guessing! 1) if a 100m^3 object f

Question

Help! but please do not answer if you are just guessing!

1) if a 100m^3 object floats in water and 25% of the objects volume is submerged how much dows the object weigh in air?

a) 2.5 X 10^5N

b) 7.5 X 10^5N

c)1.0X 10^6N

d) 0.0N

and there is a possible choice of not enough information but i dont believe that its the answer

2) you toss a stone into the pacific ocean. As the rock sinks deeper and deeper into the ocean what happens to the bouyant force acting on it? Assume the density of water remains constant with depth and that the acceleration due to gravity does not change appreciably

a) it decreases

b) it increases

c) it remains the same

d) there is no buoyant force

e) it increases than disappears when it reaches the bottom.

3) At a depth of 150m what force will the exterior surface of a submarine window experience due to the absolute pressure from the sea water against it? (the area of the window is 0.35m^2 and the density of seawater is 1028kg/m^3)

a)F=5.65 X 10^5N

b)F=1.64 X 10^6N

c)F=1.54 X 10^6N

d)F=5.40X 10^5N

e)F=3.54 X 10^4N

Explanation / Answer

1)

a) 2.5 X 10^5N

2)c) it remains the same

3)

a)F=5.65 X 10^5N

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