Question

The buoyant force increases as you push an inflated beach ball under the water's surface. When will the force stop increasing? Explain your reasoning.

Answer 1

@Sam @Shadow not sure about this one would you mind taking a look when you have a chance

Answer 2

Archimedes principle states that the upward buoyant force exerted on a body is equal to the weight of the liquid that the object displaces and the buoyant force acts in the upward direction of the object.

What that means is the buoyant force is equal to the mass of the fluid that the object displaces multiplied by the gravitational acceleration, g.
\(F_{Buoyant}=m_{fluid} \times g\)
We can see that the more mass of fluid is displaced, the stronger the buoyant force is. The buoyant force stops increasing when the object is fully submerged, i.e. the entire volume of the object is equal to the amount of fluid displaced by the object.

Answer 3

An object floats in both water and oil. Oil is less dense than water. While floating, the object displaces a larger volume of oil than water. Why is the buoyant force the same in each liquid?

Answer 4

In accordance with Archimedes' Principle, the buoyancy force is the weight of fluid displaced by the object. The same weight of liquid is displaced in both cases. A greater volume of oil is displaced to make up for its lower density.

Answer 5

@Vocaloid

Answer 6

good

Answer 7

How can you use the flow rate equation to help explain why water comes out faster when a nozzle is used on a hose

Answer 8

not sure about this one

Answer 9

notice how the velocity is slower through the area with the wider cross section, faster with the narrow cross section

how does that apply to your hose scenario?

Answer 10

the hose is a narrow cross section?>

Answer 11

what affect does a nozzle have on the cross section, compared to the un-nozzled hose?

Answer 12

it is wider

Answer 13

see how the little streams of water are narrower than the hose cross section? the nozzle decreases the cross sectional area through which the water flows, increasing the velocity