1. Which of the following are assumptions that must be true to use the hydrostat

Question

1. Which of the following are assumptions that must be true to use the hydrostatic pressure equation a.the fluid must be at rest (no net motion) b.the fluid's density does not change with depth (is constant) c.the fluid is in a container with straight walls
2. If a fluid of constant density is at rest (no net motion), then the pressure a given depth (e.g. a distance 3cm below the surface) is a.the same at all locations with this depth b.different at locations with this same depth.
3.Water sits in a tall, glass with vertical sides. Does the water exert a net force on the vertical side? a.Yes, the net force of the water on the side of the glass is parallel to surface (side of the glass). b.Yes, the net force of the water on the side of the glass is perpendicular to the surface (side of the glass). c.Yes, the net force of the water has components both parallel and perpendicular to the side of the glass.
4. The hydrostatic pressure equation says that pressure in a fluid (decrease with depth, increase with depth, in the same at all depth) due to (weight of the fluid above, motion of the fluid above, changing density of the fluid above)
5. Which of the following states Pascal's principle? a.If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount. b. The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object. c.Pressure at lower vertical levels in a fluid increases due to the weight of the fluid above
6. What causes a suction cup to stick? a. The suction cup forms strong chemical bonds with the surface it touches. b. The air between the suction cup and the surface actively pulls the suction cup towards the surface. c. The atmospheric pressure on the outside of the suction cup pushes the suction cup and the surface together. This force is stronger than the force of the air between the suction cup and the surface which pushes them apart.
7. In a barometer, the atmospheric pressure outside barometer is measured by a. the height of the liquid in the barometer. b. the width of the barometer column.
1. Which of the following are assumptions that must be true to use the hydrostatic pressure equation a.the fluid must be at rest (no net motion) b.the fluid's density does not change with depth (is constant) c.the fluid is in a container with straight walls
2. If a fluid of constant density is at rest (no net motion), then the pressure a given depth (e.g. a distance 3cm below the surface) is a.the same at all locations with this depth b.different at locations with this same depth.
3.Water sits in a tall, glass with vertical sides. Does the water exert a net force on the vertical side? a.Yes, the net force of the water on the side of the glass is parallel to surface (side of the glass). b.Yes, the net force of the water on the side of the glass is perpendicular to the surface (side of the glass). c.Yes, the net force of the water has components both parallel and perpendicular to the side of the glass.
4. The hydrostatic pressure equation says that pressure in a fluid (decrease with depth, increase with depth, in the same at all depth) due to (weight of the fluid above, motion of the fluid above, changing density of the fluid above)
5. Which of the following states Pascal's principle? a.If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount. b. The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object. c.Pressure at lower vertical levels in a fluid increases due to the weight of the fluid above
6. What causes a suction cup to stick? a. The suction cup forms strong chemical bonds with the surface it touches. b. The air between the suction cup and the surface actively pulls the suction cup towards the surface. c. The atmospheric pressure on the outside of the suction cup pushes the suction cup and the surface together. This force is stronger than the force of the air between the suction cup and the surface which pushes them apart.
7. In a barometer, the atmospheric pressure outside barometer is measured by a. the height of the liquid in the barometer. b. the width of the barometer column.
1. Which of the following are assumptions that must be true to use the hydrostatic pressure equation a.the fluid must be at rest (no net motion) b.the fluid's density does not change with depth (is constant) c.the fluid is in a container with straight walls
2. If a fluid of constant density is at rest (no net motion), then the pressure a given depth (e.g. a distance 3cm below the surface) is a.the same at all locations with this depth b.different at locations with this same depth.
3.Water sits in a tall, glass with vertical sides. Does the water exert a net force on the vertical side? a.Yes, the net force of the water on the side of the glass is parallel to surface (side of the glass). b.Yes, the net force of the water on the side of the glass is perpendicular to the surface (side of the glass). c.Yes, the net force of the water has components both parallel and perpendicular to the side of the glass.
4. The hydrostatic pressure equation says that pressure in a fluid (decrease with depth, increase with depth, in the same at all depth) due to (weight of the fluid above, motion of the fluid above, changing density of the fluid above)
5. Which of the following states Pascal's principle? a.If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount. b. The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object. c.Pressure at lower vertical levels in a fluid increases due to the weight of the fluid above
6. What causes a suction cup to stick? a. The suction cup forms strong chemical bonds with the surface it touches. b. The air between the suction cup and the surface actively pulls the suction cup towards the surface. c. The atmospheric pressure on the outside of the suction cup pushes the suction cup and the surface together. This force is stronger than the force of the air between the suction cup and the surface which pushes them apart.
7. In a barometer, the atmospheric pressure outside barometer is measured by a. the height of the liquid in the barometer. b. the width of the barometer column.

Explanation / Answer

1.

use the hydrostatic pressure equation

P = rho*g*h

So following assumptions are required.

a.the fluid must be at rest (no net motion)

b.the fluid's density does not change with depth (is constant) .

2.

Accordingto Pascal law fluid is same in all direction at a fixed depth at all locations

a.the same at all locations with this depth .

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