Ck-12 Fluid Forces

How does fluid pressure behave in different directions?

• Fluid pressure is only exerted downward.

• Fluid pressure is exerted in all directions, not just downward.

• Fluid pressure is exerted only horizontally.

• Fluid pressure decreases with depth.

What factors affect the pressure exerted by a fluid?

• The temperature of the fluid, the viscosity of the fluid, and the surface area of the container.

• The density of the fluid, the depth of the fluid, and the gravitational force acting on it.

• The color of the fluid, the shape of the container, and the speed of the fluid.

• The chemical composition of the fluid, the pressure of the surrounding air, and the volume of the fluid.

What is the formula for calculating pressure in a fluid?

• P = F/A

• P = A/F

• P = F + A

• P = F - A

What does Archimedes' principle state about buoyancy?

• An object submerged in a fluid experiences no force.

• An object submerged in a fluid experiences a downward force equal to its weight.

• An object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

• An object submerged in a fluid will float regardless of its density.

What is the significance of fluid pressure in engineering applications?

• Fluid pressure is crucial in engineering applications as it affects the design and functionality of systems like hydraulics, aerodynamics, and fluid transport.

• Fluid pressure is only relevant in theoretical physics and has no practical applications in engineering.

• Fluid pressure is primarily concerned with the temperature of fluids in engineering systems.

• Fluid pressure is a minor factor in engineering, overshadowed by material strength and durability.

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What is the relationship between pressure and fluid density?

• Denser fluids exert greater pressure than less dense fluids.

• Pressure is independent of fluid density.

• Less dense fluids exert greater pressure than denser fluids.

• Fluid density has no effect on pressure.

Why does ice float on water?

• Ice is more dense than water.

• Ice is less dense than water.

• Ice has a higher temperature than water.

• Ice is made of a different substance than water.

What is the definition of fluid density?

• Fluid density is the weight of a fluid per unit area.

• Fluid density is the mass per unit volume of a fluid, typically expressed in kilograms per cubic meter (kg/m³).

• Fluid density is the temperature of a fluid at a given pressure.

• Fluid density is the volume of a fluid per unit mass.

What is the concept of hydrostatic pressure?

• Hydrostatic pressure is the pressure exerted by a fluid in motion due to external forces.

• Hydrostatic pressure is the pressure exerted by a fluid at rest due to the weight of the fluid above it.

• Hydrostatic pressure is the pressure experienced by objects submerged in a gas.

• Hydrostatic pressure is the pressure that varies with temperature in a fluid.

What is the role of surface tension in fluids?

• It is the force that allows fluids to flow freely without resistance.

• It is the cohesive force at the surface of a fluid that causes it to behave as if it has an elastic 'skin', affecting how objects interact with the fluid.

• It is the pressure exerted by a fluid in motion that influences its speed.

• It is the temperature at which a fluid changes from liquid to gas.