Physics Final Exam Reviewer [Untouched]

Which of the following does not affect the pressure beneath the surface of a liquid?

Group of answer choices

strength of the gravitational field

area of the liquid surface

density of the liquid

depth of the liquid

area of the liquid surface

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?

Group of answer choices

Liquid A

Liquid B

Both

Same

Liquid A

What happens to the buoyant force acting on the airship as it rises in the air?

Group of answer choices

Buoyant force increases

Buoyant force first increases then shows decrease

Buoyant force decreases

Buoyant force remains constant

Buoyant force decreases

Archimedes' principle states that the buoyant force on an object is equal to ______.

Group of answer choices

The volume of the liquid displaced

The speed of the fluid displaced

The mass of the fluid displaced

The weight of the fluid displaced

The weight of the fluid displaced

Transfer of thermal energy, in a liquid or gas, in which the warmer substance rises and the cooler substance sinks; forms a current.

Group of answer choices

Conduction

Thermal Energy

Convection

Radiation

Convection

Complete the following statement: When a substance undergoes fusion it

Group of answer choices

condenses.

sublimes.

freezes.

vaporizes.

freezes.

Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions?

Group of answer choices

From 14.5°C to 15.5°C at 760mm of Hg

From 3.5°C to 4.5°C at 76mm of Hg

From 98.5°C to 99.5°C at 760mm of Hg

From 13.5°C to 14.5°C at 76mm of Hg

From 14.5°C to 15.5°C at 760mm of Hg

Temperature is a microscopic concept.

Group of answer choices

True

False

True

The condition where two substances in physical contact with each other exchange no heat energy. They are said to be the same temperature and is referred to as :

Group of answer choices

Thermal Energy

Thermal Equilibrium

Energy Transfer

Cooler to Warmer

Thermal Equilibrium

Which one of the following temperatures is approximately equal to "room temperature?"

Group of answer choices

293 K

100 K

0 K

100 °C

293 K

A barometer is taken from the base to the top of a 279-m tower. Assuming the density of air is 1.29 kg/m3, what is the measured change in pressure?

Group of answer choices

359 Pa

927 Pa

2120 Pa

3530 Pa

3530 Pa

A body of dimensions 2.7 m 3.8 m 2.5 m, weighs 2500 N in water. Find its weight in air.

Group of answer choices

254.12 kN

327.06 kN

127.06 kN

101.65 kN

508.25 kN

254.12 kN

The coefficient of linear expansion of a certain solid is 9 x 10-6/C°. Assuming this solid behaves like most solids, what is its coefficient of volume expansion?

Group of answer choices

9.1 x 10-6/C°

27 x 10-6/C°

27 x 10-36/C°

729 x 10-6/C°

27 x 10-6/C°

A surveyor uses a steel measuring tape that is exactly81.157 m long at a temperature of 20°C. The markings on the tape are calibrated for this temperature. What is the length of the tape when the temperature is 37.474 °C?

Answer should be rounded to three (3) decimal places.

81.174 m

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.

103.68 N

Which exhibits the greatest pressure applied to a floor?

Group of answer choices

Wearing stilettos and standing in one foot

Barefoot standing in one foot

Wearing stilettos and standing on both feet

Barefoot standing in both feet

Wearing stilettos and standing in one foot

What is the mass of a solid gold ball in kg of diameter 261 cm and density of 19.3 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places.

145404.10

A plastic sphere floats in water with 55% of its volume submerged. This same sphere floats in glycerin with 58% of its volume submerged. Determine the density of the sphere (kg/m3). Numerical Answer only.

1,000.00 kg/m³

A plastic sphere floats in water with 57% of its volume submerged. This same sphere floats in glycerin with 63% of its volume submerged. Determine the density of the sphere (kg/m3). Numerical Answer only.

793.8 kg/m³

Archimedes Principle is most useful in determining the volume of ____.

Group of answer choices

Regularly shaped 3D objects

Irregularly shaped 3D objects

Non-sticky liquids

Two-dimensional objects

Irregularly shaped 3D objects

During a bout with a flu an 65 kg man ran a fever of 40.07

C instead of the normal body temperature. Assuming that the human body is mostly water, how much heat (J) is required to raise his temperature by that amount? Numerical Answer only. Round off to two (2) decimal places.

1.69 x 10⁶

Objects A, B, and C are solid metals arranged from increasing coefficient of linear expansion. If the three metals of uniform shape are subjected to the same amount of heat, which of them would show the least change in length?

Group of answer choices

Object A

Object C

Object B

None of them

Object A

Convert 22oC to Kelvins.

295.15 K

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?

Group of answer choices

Indeterminate

Yes

Negative

No

Yes

Heat is more formally known as __.

Group of answer choices

Radiant force

Hotness of something

Thermal energy

Temperature

Thermal energy

A 64 grams piece of iron at 519°C is put into 595 grams of water at 15°C. What is the final temperature (C) of the water and the iron? Numerical Answer only. Round off to four (4) decimal places.

Specific Heat of Iron = 444 J/kg-C

Specific Heat of Water = 4190 J/kg-C

20.6646°C.

A shower head has 20 circular openings, each with radius 1.0 mm. The shower head is connected to a pipe with radius 0.80 cm. If the speed of water in the pipe is 3.0 m/s, what is its speed as it exits the shower-head openings?

Group of answer choices

2.9 m/s

5 m/s

9.6 m/s

3.5 m/s

10.5 m/s

9.6 m/s

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?

Group of answer choices

mercury

water

benzene

ethyl alcohol

ethyl alcohol

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?

Group of answer choices

The force exerted by the water on dam A is greater than that on dam B.

The horizontal distance of the water behind the two dams does not determine the force on them.

The force exerted by the water on dam B is greater than that on dam A.

Dam A is more likely to collapse than dam B if the water level rises.

The force exerted by the water on dam B is greater than that on dam A.

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 water, should you__________________________.

Group of answer choices

leave the treasure chest on top of the raft or hang the treasure chest in the water with a rope attached to the raft

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

leave the treasure chest on top of the raft

secure the treasure chest to the underside of the raft

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

As a balloon rises in the air its volume increases, at the end it acquires a stable height and cannot rise any further.

Group of answer choices

True

False

True

Which one of the following properties could not be used as a temperature sensitive property in the construction of a thermometer?

Group of answer choices

the change in electrical resistance of a wire

the change in pressure of a gas at constant volume

the change in mass of a solid

the change in length of a metal rod

the change in volume of a liquid

the change in mass of a solid

The digital sign outside a local bank reports that the temperature is 44 °C. What is the temperature in degrees Fahrenheit?

Group of answer choices

111 °F

56 °F

120 °F

79 °F

99 °F

111 °F

The liquid in the thermometer rises when it is placed in the hot water because ___________.

Group of answer choices

it gains heat from the hot water and expands.

the surrounding air is too warm.

the liquid is boiling.

loses heat from the hot water and contracts.

it gains heat from the hot water and expands.

An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________

Group of answer choices

At all times it is the darkest body

It cannot be distinguished at all times

Initially, it is darkest body and at later times the brightest

Initially, it is the darkest body and at later it cannot be distinguished

Initially, it is darkest body and at later times the brightest

Place equal masses of aluminum and copper the same distance from a fire. If aluminum has a higher specific heat than copper, the one to undergo the faster increase in temperature will be the_________

Group of answer choices

aluminum

No answer text provided.

copper

No answer text provided.

copper

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.

Group of answer choices

6040 kg/m3

3020 kg/m3

12080 kg/m3

24160 kg/m3

7235 kg/m3

6040 kg/m3

The coefficient of linear expansion of steel is 12 x 10-6/C°. A railroad track is made of individual rails of steel 1.0 km in length. By what length would these rails change between a cold day when the temperature is -10 °C and a hot day at 30 °C?

Group of answer choices

620 cm

48 cm

480 cm

24 cm

0.62 cm

48 cm

A 0.39 -kg lead ball is heated to 75°C and dropped into an ideal calorimeter containing 0.19-kg of water initially at 44 °C. What is the final equilibrium temperature of the lead ball? The specific heat capacity of lead is 128 J/(kg ∙ C°); and the specific heat of water is 4186 J/(kg ∙ C°).

Answer should be rounded to two(2) decimal places.

46.01°C

What is the mass of a solid copper ball in kg of diameter 16 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places.

19.1 kg

42% 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.

445.20 kg/m³.

A solid object has a volume of 88 cubic centimeters. If it is submerged to a certain liquid displacing x mL, what is their volume altogether in the container provided nothing was spilled?

Group of answer choices

(88 - x) mL

(x - 88) mL

88x mL

(x + 88) mL

(x + 88) mL

A fragile glass will naturally break if being heated on one side only under rapidly increasing temperature. Which of the following will make the glass melt?

Group of answer choices

Heating it in microwave oven in high heat setting

Heating it using one candle

Heating it under the sun

Heating it uniformly and gradually

Heating it uniformly and gradually

During a bout with a flu an 76 kg man ran a fever of 40.26

C instead of the normal body temperature. Assuming that the human body is mostly water, how much heat (J) is required to raise his temperature by that amount? Numerical Answer only. Round off to two (2) decimal places.

982,392.16 J

This thermodynamic system is where there is no transfer of mass but there is a transfer of heat.

Group of answer choices

Open system

Closed system

None of these

Isolated system

Closed system

A 70 grams piece of iron at 527°C is put into 631 grams of water at 15°C. What is the final temperature (C) of the water and the iron? Numerical Answer only. Round off to four (4) decimal places.

Specific Heat of Iron = 444 J/kg-C

Specific Heat of Water = 4190 J/kg-C

20.9700°C

Convert 36oC to Kelvins.

A 62 grams piece of iron at 528°C is put into 630 grams of water at 15°C. What is the final temperature (∘C) of the water and the iron? Numerical Answer only. Round off to four (4) decimal places.

Specific Heat of Iron = 444 J/kg-C

Specific Heat of Water = 4190 J/kg-C

20.2804

Heat is added to a substance, but its temperature does not rise. Which one of the following statements provides the best explanation for this observation?

Group of answer choices

The substance must be a gas.

The substance must be a non-perfect solid.

The substance undergoes a change of phase.

The substance has unusual thermal properties.

The substance undergoes a change of phase.

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.

Group of answer choices

6 N

3 N

4 N

5 N

3 N

A 2.00-kg metal object requires 5.02 x 103 J of heat to raise its temperature from 20.0 °C to 40.0 °C. What is the specific heat capacity of the metal?

Group of answer choices

251 J/(kg ∙ C°)

63.0 J/(kg ∙ C°)

502 J/(kg ∙ C°)

126 J/(kg ∙ C°)

126 J/(kg ∙ C°)

71% 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.

871.83

Exposure to heat makes the molecules of an object ___.

Group of answer choices

Vibrate

Collapse

Combust

Disappear

Vibrate

How much heat (kJ) is required to convert 12 g of ice at -6 C to steam at 103C? Numerical Answer only. Round off to two (2) decimal places.

Specific Heat of Ice = 2.090 kJ/kg C

Specific Heat of Water = 4.190 kJ/kg C

Specific Heat of Steam = 2.010 kJ/kg C

Steam Heat of Vaporization = 2260 kJ/kg

Water Heat of Fusion = 334 kJ/kg

39.96 kJ

If 80 mL of pure water was displaced by a certain object, what is the buoyant force acting on the object? Use g = 9.81 m/s2.

Group of answer choices

0.008 N

0.7848 N

0.8324 N

0.8 N

0.7848 N

What is the mass of a solid copper ball in kg of diameter 94 cm and density of 8.9 x 103 kg/m3? Numerical Answer only. Round off to two (2) decimal places.

4.15

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 object?

Group of answer choices

Mass only

Volume only

Neither of the two

Mass and volume

Mass only

Absolute zero on the Celsius temperature scale is -273.15 °C. What is absolute zero on the Fahrenheit temperature scale?

Group of answer choices

-363.67 °F

-459.67 °F

-395.67 °F

-331.67 °F

-427.67 °F

-459.67 °F

A cube of wood having an edge dimension of 20.0 cm and a density of 650 kg/m3 floats on water. What is the distance from the horizontal top surface of the cube to the water level?

Group of answer choices

8.0 cm

7.0 cm

10 cm

20cm

5.0 cm

7.0 cm

What mass of water (at 4.0 °C) can be contained in a rectangular box whose dimensions are 10.0 cm by 5.00 cm by 1.00 cm? The density of water at 4.0 °C is 1.000 ´ 103 kg/m3.

Group of answer choices

50.0 g

5.0 g

25.0 g

10.0 g

50.0 g

Calculate the change in temperature of an 900mm aluminum bar, that has increased in length to 901.035mm.(α = 25 x 10-6 )

Group of answer choices

46oC

57oC

34.5oC

12oC

46oC

In conduction process the molecules of the solid pass the heat from one to another, ____________.

Group of answer choices

without themselves moving from one place to another.

without themselves moving from their positions

themselves move from one place to another

No answer text provided.

without themselves moving from their positions

At standard temperature and pressure, carbon dioxide has a density of 1.98 kg/m3. What volume does 0.85 kg of carbon dioxide occupy at standard temperature and pressure?

Group of answer choices

2.3 m^3

0.86 m^3

0.43 m^3

4.8 m^3

0.43 m^3

A 15.0-kg solid gold statue is raised from the sea bottom. What is the tension in the hoisting cable (assumed massless) when the statue is at rest and completely underwater?

Group of answer choices

9.1 N

139.16 N

7.84 N

200 N

147 N

139.16 N

The coefficient of linear expansion of aluminum is 23 x 10-6/C°. A circular hole in an aluminum plate is 2.725 cm in diameter at 0 °C. What is the diameter of the hole if the temperature of the plate is raised to 100 °C?

Group of answer choices

2.731 cm

2.788 cm

2.728 cm

2.757 cm

0.0063 cm

2.788 cm

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 474 Joules of heat is added to 17grams?

Answer should be rounded off to two decimal places.

71.5°C

Holding mass constant, if the volume of an object quadruples, its density is ___.

Group of answer choices

Quartered

Quadrupled, as well

Halved

Doubled

Quartered

Suppose a 72kg 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.

988.39 kg/m³

A hydraulic system is used to lift a 3,303kg vehicle in an auto garage. If the vehicle sits on a piston of area 0.89 square meter, and a force is applied to a piston of area 0.08 square meters, what is the minimum force (N) that must be applied to lift the vehicle? Numerical Answer only. Round off to two (2) decimal places.

294242.8

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.

108.60 kg

Suppose a 66kg woman floats in fresh water with 84% of her volume submerged when her lungs are full of air. What is her average density (kg/m3)? Numerical Answer only.

840 kg/m³

The final temperature of a rod that underwent heating is the boiling point of pure water. What is its initial temperature if the change in temperature is 12° C?

88°C

At solid to liquid phase change in an isolated system, there is no change in temperature, only the __.

Group of answer choices

Thermal radiation

Latent heat of vaporization

Change in mass

Latent heat of fusion

Latent heat of fusion

When two magnetic North poles are brought close to each other, they will

Group of answer choices

repel

cancel each other out

create sparks

attract

repel

When a magnet is able to move freely, its North pole will

Group of answer choices

point to the Earth's magnetic North pole

point to the Earth's geographic North pole

spin wildly

point to the Earth's South pole

point to the Earth's magnetic North pole

This Law says that the Induced current is proportional to the change of magnetic flux .

Group of answer choices

Faraday's

Coulomb's

Ampere's

Lenz's

Faraday's

A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will________

Group of answer choices

be excessive

decrease

increase

remain constant

decrease

A solenoid with 500 turns, 0.10 m long, carrying a current of 4.0 A and with a radius of 10-2 m will have what strength magnetic field at its center?

Group of answer choices

62 x 10 - 4 T

250 x 10 - 4 T

31 x 10 - 4 T

125 x 10 - 4 T

250 x 10 - 4 T

A solenoid of length 0.250 m and radius 0.0200 m is comprised of 120 turns of wire. Determine the magnitude of the magnetic field at the center of the solenoid when it carries a current of 15.0 A.

Group of answer choices

52 x 10-3 T

50 x 10-3 T

05 x 10-3 T

26 x 10-3 T

52 x 10-3 T52 x 10-3 T

A magnetron in a microwave oven emits electromagnetic waves with frequency f= 2,710 MHz. What magnetic field strength in Tesla is required for electrons to move in circular paths with this frequency? Numerical Answer only. Round off to three (3) decimal places

0.011 T

A solenoid has an inductance of 87.1mH and a resistance of 0.34 Ω. How long would it take for the current to go from zero to 63% of its final value when connected ot a battery of voltage , V. Numerical Answer only. Round off to three (3) decimal places.

0.255 seconds

An electron travels through a region of space with no acceleration. Which one of the following statements is the best conclusion?

Group of answer choices

E must be zero, but B might be non-zero in that region

E and B might both be non-zero, but they must be mutually perpendicular.

B must be zero, but E might be non-zero in that region.

Both E and B must be zero in that region

E and B might both be non-zero, but they must be mutually perpendicular.

A solenoid has an inductance of 83mH and a resistance of 0.48 Ω. Find the time constant for this circuit. Numerical Answer only. Round off to three (3) decimal places.

A transformer for home use of a portable radio reduces 120-V ac to 9 V dc. A secondary coil contains 35 turns and the radio draws 408mA. Calculate the number of turns in the primary coil.

467 t

A transformer for home use of a portable radio reduces 120-V ac to 12 V dc. A secondary coil contains 38 turns and the radio draws 357mA. Calculate the number of turns in the primary coil.

What is the induced voltage across a coil with 58 turns that is located in a magnetic field that is changing at a rate of -9 Wb/s? Numerical Answer only.

522

What is the induced voltage across a coil with 94 turns that is located in a magnetic field that is changing at a rate of -5 Wb/s? Numerical Answer only.

A circular coil 0.04 m in radius, with 33 turns of wire, lies in a horizontal plane. It carries a counterclockwise (as viewed from above) current of 6 a. The coil is in a uniform 1.3-T magnetic field directed toward the right. Find the magnitude of the torque on the coil in Nm. Numerical Answer only. Round off to four (4) decimal places.

1.2965

The north pole of a magnet is pushed downward into the center of a loop of wire. What will happen?

Group of answer choices

No current will be induced in the wire because you need the south pole of the magnet to induce current.

No current will be induced in the wire because the wire is not moving.

Current will be induced in the wire in a counter-clockwise direction

Current will be induced in the wire in a clockwise direction

Current will be induced in the wire in a counter-clockwise direction

A superconducting wire carries a current of 104 A. Find the magnetic field at a distance of 1.0 m from the wire.

Group of answer choices

1.6 x 10-2 T

3.2 x 10-2 T

2 x 10-3 T

8 x 10-3 T

2 x 10-3 T

A solenoid has an inductance of 85.2mH and a resistance of 0.26 Ω. Find the time constant for this circuit. Numerical Answer only. Round off to three (3) decimal places.

The Earth's magnetic field passes through a square tabletop with a magnitude of 4.95 x 10-5 T and is directed at an angle of 165° relative to the normal of the tabletop. If the tabletop has 1.50-m sides,what is the magnitude of the magnetic flux through it?

Group of answer choices

30 x 10-6 Wb

7.11 x 10-5 Wb

2.88 x 10-5 Wb

1.08 x 10-4 Wb

1.08 x 10-4 Wb

What is the induced voltage across a coil with 89 turns that is located in a magnetic field that is changing at a rate of -5 Wb/s? Numerical Answer only.

A single circular loop of wire of radius 0.75 m carries a constant current of 3.0 A. The loop may be rotated about an axis that passes through the center and lies in the plane of the loop. When the orientation of the normal to the loop with respect to the direction of the magnetic field is 25°, the torque on the coil is 1.8 N × What is the magnitude of the uniform magnetic field exerting this torque on the loop?

Group of answer choices

1.7 T

0.80 T

0.37 T

3.0 T

0.80 T

A circular coil 0.06 m in radius, with 32 turns of wire, lies in a horizontal plane. It carries a counterclockwise (as viewed from above) current of 4 a. The coil is in a uniform 1.2-T magnetic field directed toward the right. Find the magnitude of the torque on the coil in Nm. Numerical Answer only. Round off to four (4) decimal places.

For a given wirewound core, an increase in current through the coil

Group of answer choices

reverses the flux lines

decreases the flux density

increases the flux density

causes no change in flux density

increases the flux density

The path executed by a chargged particle whose motion is perpendicular to the magnetic field is

Group of answer choices

a straight line

an ellipse

a circle

a helix

a circle

A circular coil 0.04 m in radius, with 29 turns of wire, lies in a horizontal plane. It carries a counterclockwise (as viewed from above) current of 5 a. The coil is in a uniform 1.5-T magnetic field directed toward the right. Find the magnitude of the magnetic moment on the coil in A-m2. Numerical Answer only. Round off to four (4) decimal places.

0.7308 A-m²

An electric wire in the wall of a building carries a DC current of 32 A vertically upward. What is the

magnetic field (in microTesla) due to this current at a point P 10 cm due north of the wire? Numerical Answer only. Round off to three (3) decimal places.

64.000 μT

A uniform magnetic field passes through two areas, A1 and A2. The angles between the magnetic field and the normals of areas A1 and A2 are 30.0° and 60.0°, respectively. If the magnetic flux through the two areas is the same, what is the ratio A1/A2?

Group of answer choices

0.816

0.577

1.73

1.00

0.577