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Pressure
Buoyancy
Mixed Calculations
Fluid Mechanics
Conceptual Questions
100
This is the mathematical formula for pressure.
What is F/A?
100
Things float in water when their density is less than this.
What is he density of water?
100

A coffee table has a mass of 12 kg and sits on 4 legs, each with an area of 15cm2. This is the pressure exerted on the floor by EACH leg. (Answer in N/cm2)

What is 2 N/cm2?

100
This principle describes how airplanes fly.
What is Bernoulli's principle?
100

A puddle on the street has a layer of oil floating on it. This is Newton's third law force pair.

What is the weight of the water and the gravitational force exerted by the water on Earth?

200
This is pressure measured at a depth in a liquid NOT including atmospheric pressure.
What is gauge pressure?
200
This is the density of water (in kg/m^3).
What is 1000?
200

A 3.0 kg block hanging from a spring scale is submerged in a beaker of water until the spring scale reads 20 N. This is the buoyant force on the block.

What is 10 N?

200
Bernoulli's principle says that the faster that a fluid flows, the lower the __________________.
What is pressure?
200

A student has three objects of different shapes and wants to compare their densities using liquids of known density. This is the experimental method to allow for the comparison of their densities.

What is let each object float in the same liquid and compare the fractions of the objects' volumes that are below the liquid surface?

300
This is the SI unit of pressure.
What is pascals?
300
This is the buoyant force on a 10kg object that has a volume of 1m^3.
What is 10,000 N?
300

An ideal fluid is flowing with a speed of 12 cm/s through a pipe of diameter 5 cm. The pipe splits into three smaller pipes, each with a diameter of 2 cm. This is the speed of the fluid in the smaller pipes (in cm/s).

What is 25 cm/s?

300
Fluids are not this. (Gasses are...)
What is compressible?
300

An underground tunnel has two openings, with one opening a few meters higher than the other. If air moves past the higher opening at a greater speed than it moves past the lower opening, this happens inside the tunnel.

What is the air moves from the lower opening toward the higher opening?
400

The pressure exerted on the bottom of a dam by the water in the reservoir created by the dam depends on this.

What is depth of the water at the dam?

400
This is the apparent weight of a 10kg object, in water, with a volume of .002m^3.
What is 80N?
400

A tank with a diameter of 10 m is open at the top and contains water that is 12 m deep. There is a hole 1.0 m from the bottom of the tank with a diameter of 0.02 m. This is the speed of the water as it exits the hole.

What is 14.8 m/s?

400
Pascal's principle says that F1/A1 = this.
What is F2/A2?
400

The equation of continuity for an incompressible fluid is essentially an expression of the conservation of this.

What is mass?

500
This is the ABSOLUTE pressure experienced by a diver who is 10m below the surface of the ocean. (Use g=10m/s^2, answer in kPa)
What is 201.3 kPa? (201 kPa is also acceptable)
500
Apparent weight is equal to weight minus this.
What is buoyant force?
500

Water (density = 1.0 × 103 kg/m^3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0 m/s The difference in pressure between the two ends is 4.5 ×10^3 Pa. This is the speed of the water at the narrow end.

What is 5 m/s?

500
This is a system in which force is applied to a piston in a small liquid reservoir, leading to a larger liquid reservoir and a larger piston upon which force is then applied.
What is a hydraulic press?
500
Region I has a wider diameter than Region II in a pipe with an ideal fluid in motion to the right (from Region I to Region II). As the fluid enters Region II, this quantity(quantities) related to the fluid will increase. 


(pressure, linear speed and/or volume rate of flow)

What is linear speed?