AP PHYSICS 1 Part 2

The pressure at the bottom of a swimming pool depends on all of the following except:

the volume of water in the pool

When an object floats in water, three-fourths of its volume is beneath the surface. What is the density of the object?

750 kg/m³

If a piece of steel and a piece of aluminum of the same volume are dropped into water, what can be said about the buoyant force acting on each of them?

The same on both

Find the apparent weight of an object fully submerged in water if its volume is 2.00 m³ and its density is 4000 kg/m³.

58800 N

An empty scuba tank and a full scuba tank are at rest at the same depth. Which tank has greater buoyant force acting on it?

the same on both

A person weighing 900 N is standing on snowshoes. Each snowshoe has an area of 2500 cm². Find the pressure on the snow.

1800 Pa

The buoyant force on an object submerged in fluid does not depend on_________.

the density of the object

The operation of a hydraulic jack is based on _______.

Pascal's principle

The tires of a car are inflated to a gauge pressure of 2.0x10⁵ PA. If the area of contact of each tire with the ground is 0.024 m², what is the weight of the car?

19200 N

An object floats in water with two-thirds of its volume submerged. What is the object's density?

667 kg/m³

What fraction of a piece of wood (density is 0.8x10³ kg/m³) will be beneath the surface when it floats in water?

80%

What volume of fresh water must a ship with a mass of 10 million kg displace in order to float?

10⁴ m³

A rectangular 4m x 10m swimming pool is filled to a depth of 5 m. What is the force on the bottom of the pool?

2x10⁶N

The density of mercury is 1.36x10⁴ kg/m³. Find the mass of a 4.00x10^-4 m³sample of mercury.

5.44 kg

A hollow rectangular box is filled with the liquid and can be placed in any of three orientations as shown. In which orientation will the fluid pressure at the bottom of the box be greatest, and why?

Orientation X, because pressure at the bottom of a fluid is greater when the vertical height of the fluid is greater

The equation of continuity is based on the conservation of ______________.

mass

Water flows through a horizontal tapered pipe. At the wide end its speed is 4.00 m/s and at the narrow end it is 5.00 m/s. The pressure in the wide pipe is 2.50x10⁵ Pa. What is the pressure in the narrow pipe?

2.45x10⁵ Pa

Blood flowing through an artery reaches a place where the artery is narrowed. The speed of the blood in the narrow section __________.

increases

The radius of a pipe carrying water increases by a factor of two. As a result, the speed of the water in the pipe ___________________.

decreases by a factor of four

Where is the air pressure the greatest around the airplane wings?

Below

Water at a pressure of 3.5 x 10⁵ Pa is flowing at 5.0 m/s in a pipe which narrows to 1/3 its former area. What is the pressure and velocity of the water in the narrow section?

2.5 x 10⁵ Pa, 15 m/s

Water flows under pressure from one pipe into a second pipe having half the diameter. The volume flow rate in the narrow pipe is ________ that in the wide pipe, and the speed of the water in the narrow pipe is _______ that in the wide pipe.

equal to, 4 times

Water flows through a pipe of diameter 8.0 cm with a speed of 10.0 m/s. It then enters a smaller pipe of diameter 3.0 cm. What is the speed of the water as it flows through the smaller pipe?

71 m/s

Water flowing at 4 m/s in a horizontal pipe enters a section with a radius twice as large. What is the speed of the water in the wider part of the pipe?

1 m/s

The pressure differential across an airplane wing cross section is explained by:

Bernoulli's equation

According to __________ Principle, when the velocity of a fluid is high, the _______ is low.

Bernoulli's, pressure

Oil of a density of 925 kg/m³ flowing through a pipeline at a constant speed encounters a vertical bend in the pipe, raising it 4.0 m. What is the difference in pressure in the oil before and after the rise?

-3.6 x 10⁴ Pa

The density of the liquid flowing through a horizontal pipe is 1500 kg/m³. The speed of the fluid at point A is 5.5 m/s while at point B it is 8.0 m/s. What is the difference in pressure, P_B - P_A, between points B and A?

-2.5 x 10⁴ Pa

The figure shows pipe 1 of cross-sectional area A₁ and pipe 2 of cross-sectional area A₂ which merge into pipe 3 of cross-sectional area A₃. The water in pipes 1 and 2 flows with speeds v₁ and v₂ respectively. What is the speed of the water and pipe 3?

(A1V1 + A2V2)/(A3)

Water of density 1000 kg/m³ flows at a speed of 3.0 m/s through a section of pipe of radius 0.040 m. The pipe bends upward to 0.25 m above its original height and tapers to a radius of 0.020 m, as shown in the figure above. If the water pressure is 1.50×10⁵ Pa in the lower part of the pipe, the water pressure in the upper part of the pipe is most nearly:

0.80×10⁵ Pa