Question

# 1. The three tanks shown above are filled with water to an equal depth. All the...

1. The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the least surface area at the bottom, tank B has the greatest and tank C has the middle area at the bottom.
(Select T-True, F-False, G-Greater than, L-Less than, E-Equal to. If the first is F the second L and the rest G, enter
FLGGGG).

A) The total force exerted by the water on the bottom of tank B is ... the total force exerted by the water on the bottom of tank C
B) The pressure at the bottom of tank B is ... the pressure at the bottom of tank C
C) The air pressure right at the top surface of water in tank C is .... the air pressure right at the top surface of water in tank B
D) The pressure exerted on the bottom of tank B is greater than for the other tanks.
E) The water in tank B exerts a downward component of force on the sides of the tank.

2. Find the initial acceleration downwards of an iron ball of density 8.7 g/cm3 when placed under water and released from rest.

3. A spherically shaped balloon has a radius of 9.90m, and is filled with helium. How large a mass of cargo can it lift, assuming that the skin and structure of the balloon have a mass of 930kg? Neglect the bouyant force on the cargo volume itself. The density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3.

pressure = density * g * height

so,

pressure is not dependent of the area it's dependent on the height

A) The total force exerted by the water on the bottom of tank B is Greater than the total force exerted by the water on the bottom of tank C
B) The pressure at the bottom of tank B is Equal to the pressure at the bottom of tank C
C) The air pressure right at the top surface of water in tank C is Equal to the air pressure right at the top surface of water in tank B
D) The pressure exerted on the bottom of tank B is greater than for the other tanks False
E) The water in tank B exerts a downward component of force on the sides of the tank False

*please post only 1 question in a single post

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