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Physics2 FA1
| Question | Answer |
|---|---|
| Which of the following does not affect the pressure beneath the surface of a liquid? | area of the liquid surface |
| How can relatively denser object be made to float on the less dense fluid? | By altering the shape. |
| As a balloon rises in the air its volume increases, at the end it acquires a stable height and cannot rise any further. | True |
| A swimming pool has the dimensions shown in the drawing. It is filled with water to a uniform depth of $8.00\text{ m}$. The density of water = 1.00 times 10^3 { kg/m}^3 | 1.80 x 105 Pa |
| What is the mass of a 15 centimeter cube of iron if the density of iron is 7.87 grams/centimeter³? | 26.56 kilograms |
| A stone weighs 450 N in air and 200 N in water. Compute the volume of stone. | 0.025 m3 |
| Find the density of metallic body which floats at the interface of mercury of sp.gr 13.6 and water such that 40 % of its volume is sub-merged in mercury and 60% in water. | 6040 kg/m3 |
| If solid objects A, B, C, and D of different densities are arranged from least dense to most dense and assuming their densities are higher than that of pure water, which of them would submerge the fastest if they were all released at the same time onto a | A |
| Which exhibits the greatest pressure applied to a floor? | Wearing stilettos and standing in one foot |
| What is the mass of a solid silver ball in kg of diameter 27 cm and density of 10.49 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 108.11 |
| What is the mass of a solid copper ball in kg of diameter 11 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 6.20 |
| Calculate the weight (N)of the air at 20 LaTeX: ^\circ∘ C in a living room with 5m by 5m and a ceiling at 3m high. Numerical Answer only. Round off to two (2) decimal places. | 882.90 |
| 28% of a half-filled PET bottle is immersed in dishwashing liquid while the rest of it is floating. What is the density of the filled bottle if the density of the dishwashing liquid is 1060 kg/m3? Input numerical answer in two decimal places. | 296.80 |
| Suppose a 79kg woman floats in fresh water with 77% of her volume submerged when her lungs are full of air. What is her average density (kg/m3)? Numerical Answer only. | 770 |
| 40% of a half-filled PET bottle is immersed in brine while the rest of it is floating. If the density of brine is 1230 kg/m3, what is the density of the filled bottle? Input numerical answer in two decimal places. | 492 |
| The two dams are identical with the exception that the water reservoir behind dam A extends twice the horizontal distance behind it as that of dam B. Which one of the following statements regarding these dams is correct? | The horizontal distance of the water behind the two dams does not determine the force on them. |
| Archimedes' principle states that the buoyant force on an object is equal to ______. | The weight of the fluid displaced |
| Estimate the net force exerted on your eardrum due to the water above when you are swimming at the bottom of a pool that is 5.0 m deep. | 5 N |
| A large weather balloon whose mass is 226 kg is filled with helium gas until its volume is 325 m3. Assume the density of air is 1.20 kg/m3 and the density of helium is 0.179 kg/m3. Find the net force on the balloon and determine whether the balloon will r | 1.04 ^3 x 10 3 N |
| Find the position of center of buoyancy for a wooden block of width 3.5 m and depth 1 m, when it floats horizontally in water. The density of wooden block id 850 kg/m3 and its length 7.0 m. | 0.85 |
| Within an enclosed vessel, the pressure exerted on a fluid will be distributed and undiminished all throughout the walls of the vessel. Which of the following states this? | Pascal’s Principle |
| A cube of sugar is tossed onto a glass full of pure water. Without stirring the mixture, you noticed that as it gradually floated toward the top of the water, exhibiting diminishing density. As the cube of sugar disintegrates, what did it lose as a solid | Mass and volume |
| Calculate the weight (N)of the air at 20 C in a living room with 5m by 6m and a ceiling at 3m high. Numerical Answer only. Round off to two (2) decimal places. | 1058.40 |
| A hydraulic system is used to lift a 3,185kg vehicle in an auto garage. If the vehicle sits on a piston of area 0.78 square meter, and a force is applied to a piston of area 0.07 square meters, what is the minimum force (N) that must be applied to lift th | 2801.17 |
| What is the mass of a solid copper ball in kg of diameter 62 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 1110.62 |
| 22% of a half-filled PET bottle is immersed in kerosene while the rest of it is floating. What is the density of the filled bottle if the density of kerosene is 820 kg/m3? Input numerical answer in two decimal places. | 180.40 |
| Suppose a 72kg woman floats in fresh water with 90% of her volume submerged when her lungs are full of air. What is her average density (kg/m3)? Numerical Answer only. | 900 |
| 30% of a half-filled PET bottle is immersed in brine while the rest of it is floating. If the density of brine is 1230 kg/m3, what is the density of the filled bottle? Input numerical answer in two decimal places. | 369 |
| A 50.0-kg woman wearing high-heeled shoes is invited into a home in which the kitchen has vinyl floor covering. The heel on each shoe is circular and has a radius of 0.500 cm. If the woman balances on one heel, should the homeowner be concerned? | Yes |
| You are shipwrecked and floating in the middle of the ocean on a raft. Your cargo on the raft includes a treasure chest full of gold that you found before your ship sank, and the raft is just barely afloat. To keep you floating as high as possible in the | secure the treasure chest to the underside of the raft, or hang the treasure chest in the water with a rope attached to the raft |
| Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 27.5 m. Assume the density of the water is 1.00 x 103 kg/m3 and that the air above is at a pressure of 101.3 kPa. | 3.71 x 10^ 5 Pa |
| At a location where the acceleration due to gravity is 9.807 m/s2, the atmospheric pressure is 9.891 x 104 A barometer at the same location is filled with an unknown liquid. What is the density of the unknown liquid if its height in the barometer is 1.16 | 8672 kg/m3 |
| An ore sample weighs 17.50 N in air. When the sample is suspended by a light cord and totally immersed in water, the tension in the cord is 11.20 N. Find the total volume the sample. | 6.43 x 10 -4 m3 |
| What is the mass of a solid copper ball in kg of diameter 90 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 3,397.16 |
| What is the mass of a solid gold ball in kg of diameter 97 cm and density of 19.3 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 9,222.98 |
| A hydraulic system is used to lift a 2,832kg vehicle in an auto garage. If the vehicle sits on a piston of area 0.78 square meter, and a force is applied to a piston of area 0.05 square meters, what is the minimum force (N) that must be applied to lift th | 1,779.08 |
| A plastic sphere floats in water with 49% of its volume submerged. This same sphere floats in glycerin with 57% of its volume submerged. Determine the density of the sphere (kg/m3). Numerical Answer only. | 393.60 |
| The density of iron is 7860 kg/m3. What is the mass of an iron sphere whose diameter is 0.50 m? | 514kg |
| A body of dimensions 2.7 m * 3.8 m * 2.5 m, weighs 2500 N in water. Find its weight in air. | 254.12 kN |
| Calculate the weight (N)of the air at 20 C in a living room with 4m by 7m and a ceiling at 3m high. Numerical Answer only. Round off to two (2) decimal places. | 987.84 |
| What is the mass of a solid silver ball in kg of diameter 35 cm and density of 10.49 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 235.49 |
| What is the mass of a solid copper ball in kg of diameter 13 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places. | 10.24 |
| A plastic sphere floats in water with 57% of its volume submerged. This same sphere floats in glycerin with 65% of its volume submerged. Determine the density of the sphere (kg/m3). Numerical Answer only. | 570 |
| 55% of a half-filled PET bottle is immersed in kerosene while the rest of it is floating. What is the density of the filled bottle if the density of kerosene is 820 kg/m3? Input numerical answer in two decimal places. | 451 |
| Suppose a 77kg woman floats in fresh water with 91% of her volume submerged when her lungs are full of air. What is her average density (kg/m3)? Numerical Answer only. | 910 |
| Two liquids, A and B, have densities 0.75 grams per milliliter and 1.14 grams per milliliter, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top? | Liquid A |
| You have a rock with a volume of 15cm3and a mass of 45 g. What is its density? | 3 g/cm3 |
| Several common barometers are built, with a variety of fluids. For which of the following fluids will the column of fluid in the barometer be the highest? | ethyl alcohol |
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