Physical Science Ch 12

A 20.0-gram rectangular block of wood with dimensions of 5.00 cm length, 3.00 cm width, and 2.00 cm thickness is placed in water. The buoyant force on the block is: a. 10 N b. 20 N c. 30 N d. 50 N

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Examples of amorphous solids include all of the following EXCEPT: A. metal B. glass C. wax D. rubber

A. metal

The volume of a 67.2-gram sample of platinum with a density of 21.5 g/cm^3 is A. 0.320 cm^3 B. 3.13 cm^3 C. 45.7 cm^3 D. 1,440 cm^3

B. 3.13 cm^3 WORK 67.2 g/ 21.5(g/cm^3) =3.125=3.13

The property that gives objects to bounce is: A. Strength B. elasticity C. hardness D. ductility

B. elasticity

The density of a solid material depends on two things, how closely atoms or molecules are packed together AND: A. elasticity of a chemical bond B. mass o individual atoms or molecules C. ductility of component particles D. tensil strength of each molecule

B. mass o individual atoms or molecules

Density is the Ratio: A. Mass/weight B. mass/volume C. volume/area D. mass/area

B. mass/volume

The change which is NOT a physical change is: A. bending of copper wire B. melting of an ice cube C. formation of water from oxygen and hydrogen D. ripping a piece of paper in half

C. formation of water from oxygen and hydrogen

An engineer searching for a material to develop a new kind of "indestructible" eyeglass frame would desire what characteristics? A. High hardness, high elasticity, high brittleness B. low elasticity, high brittleness C. low brittleness, high hardness, high elasticity D. high brittleness, low hardness, low elasticity

C. low brittleness, high hardness, high elasticity

The property of gold wich would make it most useful in the creation of jewelry is: A. Hardness B. elasticity C. malleability D. brittleness

C. malleability

A measure of how much pulling, or tension, a material can withstand before breaking is: A. hardness B. brittleness C. tensil strength D. malleability

C. tensil strength

The physical property that makes ketchup difficult to pour it its: A. malleability B. ductility C. viscosity D. tensil strength

C. viscosity

At 20.00°C, the density of copper is 8.900 g/cm3. If a section of copper pipe displaces 285.0 milliliters of water when dropped in a displacement tank, what is the mass of the pipe? A. 0.0310 g B. 32.00 g C. 320.0 g D. 2537 g

D. 2537 g 8.900 g/cm^3 =?/ 285.0 mL 8.900g/cm^3 x 285.0 mL =D. 2537 g

The density of a 14-gram cube of wood measuring 3.0 cm on an edge is: A. 0.51 g/cm^3 B. 0.64 g/cm^3 C. 1.9 g/cm^3 D. 4.7 g/cm^3

D. 4.7 g/cm^3 14 g/ 3.0cm

Examples of crystalline solids include all of the following EXCEPT: A. metal B. salt C. minerals D. glass

D. glass

All of the following are units to measure density EXCEPT: A. g/cm^3 B. g/mL C. kg/cm^3 D. kg/N

D. kg/N

In general, the most dense phase of matter on Earth is: A. plasma B. gas C. liquid D. solid

D. solid

(LOOK BACK IN GOOGLE CLASSROOM AT CHART) According to Graph 12-2, the density of substance C is: a. 0.67 g/cm3 b. 1.0 g/cm3 c. 1.5 g/cm3 d. 3.0 g/cm3

a. 0.67 g/cm3 20 g/ 30cm^3 =0.666=0.67g/cm^3

Atmospheric pressure is 100,000 N/m^2 at sea level. The force exerted on a sheet of plywood 3.00 meters long and 0.750 meters wide on the ground is: a. 44,444 N b. 75,000N c. 225,000 N d. 300,000N

a. 44,444 N WORK Find area first- 3.00 m x 0.750 m= 2.25m^2 Find force- 100,000N/m^2 / 2.25 m^2 = 44,444N

(LOOK BACK IN GOOGLE CLASSROOM AT CHART) According to Graph 12-2, which material has the highest density? a. A b. B c. C d. D

a. A

What does Archimedes' principle state? a. The buoyant force acting on an object is equal to the weight of the fluid displaced by the object. b. The buoyant force acting on an object is equal to the volume of the fluid displaced by the object. c. The buoyant force acting on an object decreases if the volume of the object increases. d. The buoyant force acting on an object decreases if the object is placed in a denser liquid

a. The buoyant force acting on an object is equal to the weight of the fluid displaced by the object.

The same amount of air is pumped into two containers. Container A has a volume of 10 liters. Container B has a volume of 5 liters. Both containers are held at the same temperature. Which statement below is true? a. The pressure in container A is equal to half of the pressure in container B. b. The pressure in container A is equal to twice the pressure in container B. c. The pressure in container B is equal to half of the pressure in container A. d. The pressure in both containers is the same.

a. The pressure in container A is equal to half of the pressure in container B.

According to Bernoulli's principle, if the speed of a fluid along a streamline increases all of the following may occur EXCEPT: a. a kinetic energy decrease. b. a potential energy decrease. c. a pressure energy decrease. d. both a pressure and potential energy decrease.

a. a kinetic energy decrease.

To stop descending, a diving submarine might: a. expel water on board and replace it with air. b. allow water to flood into air-filled tubes in the submarine. c. increase its velocity. d. None of the above would work.

a. expel water on board and replace it with air.

Viscosity is a measure of a material's: a. resistance to flow. b. strength. c. shape. d. molecular motion.

a. resistance to flow.

In a hydraulic lift, a small cylinder is connected to a large cylinder. A 250-newton force is applied to the 0.0025-square meter area of the small cylinder. Answer the following questions based on this information The pressure exerted on the small cylinder is: a. 3,000,000 Pa b. 100,000 Pa c. 3300 Pa d. 250 Pa

b. 100,000 Pa the pressure of small is 250N/0.0025 m^2

(LOOK BACK IN GOOGLE CLASSROOM AT CHART) According to Graph 12-2, which substance(s) would float in water? a. A only b. A and B c. C and D d. C only

b. A and B

When poured into water, glycerol (also a liquid) falls to the bottom of the beaker. Which of the following is a true statement? a. The water is more dense than the glycerol. b. An object that floats in water will always float in glycerol. c. An object that floats in glycerol will always float in water. d. The glycerol is less dense than the water.

b. An object that floats in water will always float in glycerol

"Pressure applied to an incompressible fluid is transmitted equally throughout the fluid" is an expression of: a. Archimedes' principle b. Pascal's principle c. Bernoulli's principle d. Newton's principle

b. Pascal's principle

The measure of the upward force a fluid exerts on an object that is submerged is: a. elasticity. b. buoyancy. c. gravity. d. ductility.

b. buoyancy.

When compared to a high viscosity liquid, a liquid with a low viscosity: a. must have a lower volume. b. is easier to pour. c. must have a higher density. d. takes longer to pour from one container to another.

b. is easier to pour.

Units of pressure are: a. newtons/meter b. newtons/meter^2 c. newtons/meter^3 d. pounds/inch

b. newtons/meter^2

Your teacher has given you an opaque plastic bottle that can hold 20.0 mL. You are told that the empty bottle was formed from 3.50 mL of plastic and its cap from 1.50 mL of plastic.The bottle has been filled with a mystery substance and sealed. Use the table and information to answer the following questions Liquid Weight of 1 mL of liquid Olive oil 0.0090 N Glycerin 0.0123 N If the weight of the bottle with the mystery substance inside is 0.250 N, the bottle will: (Use Table 12-1 and/or the information below the table to answer this question.) a. sink in olive oil but float in glycerin. b. sink in olive oil and glycerin. c. float in olive oil and glycerin. d. float in olive oil but sink in the glycerin

b. sink in olive oil and glycerin.

Bernoulli's principle describes the relationship between all of the following forms of energy EXCEPT: a. potential energy. b. thermal energy. c. pressure energy. d. kinetic energy

b. thermal energy.

Your teacher has given you an opaque plastic bottle that can hold 20.0 mL. You are told that the empty bottle was formed from 3.50 mL of plastic and its cap from 1.50 mL of plastic.The bottle has been filled with a mystery substance and sealed. Use the table and information to answer the following questions Liquid Weight of 1 mL of liquid Olive oil 0.0090 N Glycerin 0.0123 N When you place the sealed plastic bottle in the tank of olive oil, what is the value for the buoyant force acting on the bottle? (Use Table 12-1 and/or the information below the table to answer this question.) a. 0.147 N b. 0.198 N c. 0.225 N d. Unable to determine from the information given.

c. 0.225 N WORK Find Volume- 20.0 mL+ 3.50+1.50=25 Put volume and weight to find Buoyant force 0.0090x25=0.225N

Your teacher has given you an opaque plastic bottle that can hold 20.0 mL. You are told that the empty bottle was formed from 3.50 mL of plastic and its cap from 1.50 mL of plastic.The bottle has been filled with a mystery substance and sealed. Use the table and information to answer the following questions Liquid Weight of 1 mL of liquid Olive oil 0.0090 N Glycerin 0.0123 N When you place the sealed plastic bottle in the tank of glycerin, what is the value for the buoyant force acting on the bottle? (Use Table 12-1 and/or the information below the table to answer this question.) a. 0.198 N b. 0.225 N c. 0.308 N d. Unable to determine from the information given.

c. 0.308 N WORK Find Force- 25 x 0.0123= 0.3075= 0.308N

Liquid Weight of 1 mL of liquid Olive oil 0.0090 N Glycerin 0.0123 N Table 12-1 Your teacher has given you an opaque plastic bottle that can hold 20.0 mL. You are told that the empty bottle was formed from 3.50 mL of plastic and its cap from 1.50 mL of plastic.The bottle has been filled with a mystery substance and sealed. Use the table and information to answer the following questions Your teacher instructs you to place your bottle into a displacement tank filled with olive oil. If the bottle floats, you should gently push down until the top of the bottle is even with the surface of the liquid. Approximately how many mL of liquid will be displaced by the bottle if you follow your teacher's instructions? (Use Table 12-1 and/or the information below the table to answer this question.) a. 0.0123 mL b. 15.0 mL c. 25.0 mL d. It depends on what is inside the bottle.

c. 25.0 mL WORK 20.0+3.50+1.50=25

In a hydraulic lift, a small cylinder is connected to a large cylinder. A 250-newton force is applied to the 0.0025-square meter area of the small cylinder. Answer the following questions based on this information The weight that can be lifted by large cylinder with an area of 0.075 m 2 is: a. 250 N b. 3300 N c. 7500 N d. 100,000 N

c. 7500 N WORK OUT Find pressure first 250 N/ 0.0025m^2 =100,000 Use pressure answer to find force and multiply by the new area 100,000 x 0.075m^2=7500 N

Rubber is unusual in that it contracts (shrinks) when heated. Warming a rubber ball would: a. decrease its density. b. increase its volume. c. increase its density. d. decrease its mass.

c. increase its density.

Applied force creates pressure in all directions in: a. solids and gases. b. liquids only. c. liquids and gases. d. gases only.

c. liquids and gases.

(LOOK BACK IN GOOGLE CLASSROOM AT PHOTO) If the pressure energy in the streamline is constant at points A and B: a. both potential and kinetic energy increase from point A to point B. b. the potential energy increases from A to B while kinetic energy decreases. c. the potential energy decreases from A to B while the kinetic energy increases. d. both potential and kinetic energy decrease from point A to point B.

c. the potential energy decreases from A to B while the kinetic energy increases.

Your teacher has given you an opaque plastic bottle that can hold 20.0 mL. You are told that the empty bottle was formed from 3.50 mL of plastic and its cap from 1.50 mL of plastic.The bottle has been filled with a mystery substance and sealed. Use the table and information to answer the following questions Liquid Weight of 1 mL of liquid Olive oil 0.0090 N Glycerin 0.0123 N Your teacher asks you to place the bottle into a displacement tank filled with glycerin. If the bottle floats, you should gently push down until the top of the bottle is even with the surface of the liquid. The volume of glycerin displaced by the bottle is: (Use Table 12-1 and/or the information below the table to answer this question.) a. greater than the volume of olive oil displaced by the same procedure. b. less than the volume of olive oil displaced by the same procedure. c. the same as the volume of olive oil displaced by the same procedure. d. dependent on the weight of the glycerin

c. the same as the volume of olive oil displaced by the same procedure.

A metal bolt tied by string to a spring scale weighs 3 newtons. When the bolt is completely submerged in water, the reading on the spring scale is 2 newtons. The buoyant force exerted by water on the bolt is: a. 5 N b. 3 N c. 2 N d. 1 N

d. 1 N WORK 3N-2N= 1N

The airfoil shape of airplane wings is an important application of: a. Archimedes principle. b. Newton's principle. c. Pascal's principle. d. Bernoulli's principle.

d. Bernoulli's principle.

In a hydraulic lift, a small cylinder is connected to a large cylinder. A 250-newton force is applied to the 0.0025-square meter area of the small cylinder. Answer the following questions based on this information Compared to the pressure on the smaller cylinder, the pressure on the larger cylinder: a. is smaller. b. is larger. c. is the same. d. cannot be calculated from the information given.

d. cannot be calculated from the information given.

Matter that flows when force is applied is: a. gas only. b. liquid only. c. solid only. d. fluid

d. fluid

(LOOK BACK IN GOOGLE CLASSROOM AT CHART) According to Graph 12-2, the phase of substance A is most likely : a. plasma. b. gas. c. liquid. d. solid.

d. solid.

Ice cubes float in a glass of water because: a. the ice is losing mass through the melting process. b. the colder ice is more dense. c. liquid water is less dense than ice cubes. d. the molecules of ice are arranged in an orderly way so that there is an unusually large amount of empty space in the ice cubes.

d. the molecules of ice are arranged in an orderly way so that there is an unusually large amount of empty space in the ice cubes.