Download Physics Quiz: Chapter 4 - Pressure, Fluids, and Buoyancy and more Exams Physics in PDF only on Docsity!
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chapter 4 quiz physics questions with
Answers 100% Correct
1.a device that measures air pressure: barometer
2.an ionized gas: plasma 3.each is composed of two or more atoms: molecule 4.the relative between two places: gauge pressure 5.a combination of different elements or compounds: mixture 6.the upward force exerted by a fluid on anything immersed in it: buoyant force 7.thee smallest unit of a chemical element: atom 8.the mass density of a substance divided by the mass density of water: spe- cific
gravity
9.Particle that orbits the nucleus: electron
10.a unit of measure for pressure: atmosphere 11.the pressure exerted by a gas is the result of: molecular collisions 12.a device that measures absolute air pressure is called a: barometer 13.The difference between the pressures inside and outside a tire is called: -
gauge pressure
14.If the same-sized force is made to act over a smaller area, the pressure is:
increased
15.The upward force exerted by a fluid on an object immersed in it is called-
: bouyant force
16.When an object floats in a liquid, the buoyant force is the
weight of the object.: equal to
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17.The nucleus of an atom contains: protons and neutrons
18.The positively charged particle inside an atom is the: protons
19.The uncharged particle inside an atom is the: neutron
20.The central core inside an atom is the: nucleus
21.The particle that orbits the central core inside an atom is the: electron
22.In the chemical formula for water, H2O, what does the "2" mean?: There are two
hydrogen (H) atoms in a molecule of water.
23.What elements do the symbols H, O, C, and N stand for?: hydrogen, oxygen,
carbon, nitrogen
24.The buoyant force that keeps a ship afloat is an example of: Archimedes'
principle
25.The brakes in a car work because of: Pascal's principle
26.A helium balloon rises because of: Archimedes' principle
27.Two inflated balloons are of identical size and shape, but one is filled with
hydrogen, the other helium. Which has the larger buoyant force on it?: nei- ther—the buoyant forces must be equal
28.The ratio of the density of a material to the density of water is the: specific gravity
29.If the outside air pressure decreases, the reading on a tire gauge connect- ed to a
tire: increases
30.The gauge pressure of the water in a swimming pool at 10 ft is
the gauge pressure of the water at 5 ft.: 2 times
31.The pressure at the bottom of aquarium A is greater than that at the bottom of
aquarium B. Why might this be?: A is filled to a greater depth than B.
32.When people get into a small boat it settles lower in the water and: all of these
33.You press a stick that has a varying cross sectional area horizontally between the
4 / of lead is 11,340 kilograms per cubic meter. What is the total mass of the stack of lead (expressed in kg)?: 272,
42.A submarine dives to a depth of 50 meters in the ocean. (The mass density of
seawater is 1030 kg/m3). What is the gauge pressure at this depth (expressed in Pa)?: 504700
43.The body of a swimmer occupies a volume of 2 cubic feet. What is the buoyant
force (expressed in lbs) when the swimmer is immersed in water? (The weight density of water is 62.4 pounds per cubic foot.): 124.
44.A gold brick measuring 0.25 ft by 0.33 ft by 1 ft is submerged in water. The weight
density of gold is 1,200 pounds per cubic foot and the weight density of water is 62. pounds per cubic foot. What is the weight of the gold brick (expressed in lbs)?: 98.
45.A gold brick measuring 0.25 ft by 0.33 ft by 1 ft is submerged in water. The weight
density of gold is 1,200 pounds per cubic foot and the weight density of water is 62. pounds per cubic foot. What is the buoyant force on the gold brick (expressed in lbs)?:
46.A gold brick measuring 0.25 ft by 0.33 ft by 1 ft is submerged in water. The weight
density of gold is 1,200 pounds per cubic foot and the weight density of water is 62. pounds per cubic foot. What is the net force on the gold brick (expressed in lbs).: 93.
47.In the lab, the instructor gives you a block of silvery metal. On a digital scale it
registers 890 g; you weigh it on a spring scale and it registers 8. N. You submerge it in water; it displaces 100 cc (0.0001 m3) of water, and the spring scale registers 7.742 N. What is the metal? (Use the linked table.): nickel
