College Physics I Exam Review - 2739 Verified Questions

Page 1


Course Introduction

College Physics I Exam Review

College Physics I provides an introduction to the fundamental principles of physics, emphasizing concepts and problem-solving skills relevant to students in a variety of fields. Topics covered include mechanics, kinematics, Newton's laws of motion, energy, momentum, rotational dynamics, and the principles of waves and vibration. The course combines theoretical understanding with practical applications through laboratory experiments and exercises, helping students to develop a solid foundation in classical physics and to relate physical phenomena to real-world experiences. This course is typically designed for students not majoring in physics or engineering.

Recommended Textbook College Physics 11th Edition by Raymond A. Serway

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30 Chapters

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Page 2

Chapter 1: Units, Trigonometry, and Vectors

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Sample Questions

Q1) If = 90° ,what is the value of sin<sup>2</sup> + sin<sup>2</sup> ?

A)0

B)1

C) 1

D)The answer depends on .

Answer: B

Q2) Note the expression: y = x<sup>2</sup>.Which statement is most consistent with this expression?

A)If y doubles,then x quadruples.

B)y is greater than x.

C)If x doubles,then y doubles.

D)If x doubles,then y quadruples.

Answer: D

Q3) Note the expression: y = A/x<sup>3</sup>.Which statement is most consistent with this expression?

A)y is less than A.

B)If x is halved,y is multiplied by eight.

C)If x is doubled,y is multiplied by a factor of 8.

D)y is greater than x.

Answer: B

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Chapter 2: Motion in One Dimension

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Sample Questions

Q1) A European sports car dealer claims that his car will accelerate at a constant rate from rest to 100 km/h in 8.00 s.If so,what is the acceleration? (Hint: First convert speed to m/s. )

A)3.47 m/s<sup>2</sup>

B)6.94 m/s<sup>2</sup>

C)5.21 m/s<sup>2</sup>

D)10.4 m/s<sup>2</sup>

E)8.68 m/s<sup>2</sup>

Answer: A

Q2) A strobe photograph shows equally-spaced images of a car moving along a straight road.If the time intervals between images is constant,which of the following cannot be positive?

A)the speed of the car

B)the average velocity of the car

C)the acceleration of the car

D)the direction of motion of the car

Answer: C

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Chapter 3: Motion in Two Dimensions

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Sample Questions

Q1) What is the magnitude of the horizontal displacement of the rock?

A)3.53 m

B)13.3 m

C)222 m

D)26.1 m

Answer: D

Q2) A baseball thrown from the outfield is released from shoulder height at an initial velocity of 29.1 m/s at an initial angle of 30.0° with respect to the horizontal.What is the maximum vertical displacement that the ball reaches during its trajectory?

A)10.8 m

B)21.6 m

C)32.4 m

D)14.4 m

E)28.8 m

Answer: A

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5

Chapter 4: Newtons Laws of Motion

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Q1) A 7.00-kg mass is placed on a 28.0° incline and friction keeps it from sliding.The coefficient of static friction in this case is 0.574,and the coefficient of sliding friction is 0.528.What is the frictional force in this situation?

A)32.2 N

B)60.6 N

C)32.0 N

D)34.8 N

E)3.29 N

Q2) The acceleration due to gravity on the Moon's surface is one-sixth that on Earth.An astronaut's life support backpack weighs 250 lb on Earth.What does it weigh on the Moon?

A)1 500 lb

B)250 lb

C)256 lb

D)41.7 lb

E)244 lb

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6

Chapter 5: Energy

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Q1) A bobsled makes a run down an ice track starting at 250 m vertical distance up the hill.If there is no friction,what is the velocity at the bottom of the hill?

A)35.0 m/s

B)49.5 m/s

C)46.7 m/s

D)70.0 m/s

E)58.3 m/s

Q2) A 24.0-kg crate,initially at rest,slides down a ramp 4.0 m long and inclined at an angle of 20° with the horizontal.If there is no friction between ramp surface and crate,what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s<sup>2</sup>)

A)880 J

B)940 J

C)644 J

D)322 J

E)161 J

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Chapter 6: Momentum, Impulse, and Collisions

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Q1) A crane drops a 0.250-kg steel ball onto a steel plate.The ball's speeds just before impact and after are 4.00 m/s and 3.70 m/s,respectively.If the ball is in contact with the plate for 0.035 s,what is the magnitude of the average force that the ball exerts on the plate during impact?

A)55.0 N

B)2.14 N

C)28.6 N

D)26.4 N

E)1.93 N

Q2) A car wash nozzle directs a steady stream of water at 1.10 kg/s,with a speed of 30.0 m/s,against a car window.What force does the water exert on the glass? Assume the water does not splash back.

A)27.3 N

B)33.0 N

C)31.1 N

D)0.367 N

E)1.10 N

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Chapter 7: Rotational Motion and Gravitation

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Sample Questions

Q1) In order for a satellite to be geosynchronous,its orbit must:

A)go over the North and South Poles.

B)be over the equator.

C)be over a single longitude.

D)emit television signals.

Q2) A wheel is rotated about a horizontal axle at a constant angular speed.Next it is rotated in the opposite direction with the same angular speed.The acceleration at a point on the top of the wheel in the second case as compared to the acceleration in the first case:

A)is in the same direction.

B)is in the opposite direction.

C)is upward.

D)is tangential to the wheel.

Q3) The distance from the center of a Ferris wheel to a passenger seat is 12 m.What centripetal acceleration does a passenger experience when the wheel's angular speed is 0.50 rad/s?

A)17 m/s<sup>2</sup>

B)9.0 m/s<sup>2</sup>

C)3.0 m/s<sup>2</sup>

D)6.0 m/s<sup>2</sup>

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Chapter 8: Rotational Equilibrium and Dynamics

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Sample Questions

Q1) A ventilation fan with a moment of inertia of 0.034 kg·m<sup>2</sup> has a net torque of 0.11 N·m applied to it.If it starts from rest,what angular momentum will it have 9.0 s later?

A)0.88 kg·m<sup>2</sup>/s

B)0.99 kg·m<sup>2</sup>/s

C)2.0 kg·m<sup>2</sup>/s

D)3.3 kg·m<sup>2</sup>/s

Q2) A 274-N uniform ladder,11.0 m long,rests against a smooth vertical wall.The coefficient of static friction between ladder and floor is 0.400.What minimum angle can the ladder make with the floor before it slips?

A)84.3°

B)68.2°

C)21.8°

D)51.3°

E)11.3°

Q3) What is the center of mass of each rod?

A)rod 1: (35.20 m,0),rod 2: (0,11.73 m)

B)rod 1: (17.60 m,0),rod 2: (0,16.50 m)

C)rod 1: (2.50,4.00),rod 2: (3.75 m,0 m)

D)rod 1: (10.20 m,0),rod 2: (0,9.70 m)

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Chapter 9: Fluids and Solids

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Sample Questions

Q1) How much power is theoretically available from a mass flow of 1 000 kg/s of water that falls a vertical distance of 120 m?

A)1.18E+6 kW

B)1.20E+5 kW

C)1.18E+3 W

D)8.17E+1 W

E)1.18E+6 W

Q2) A large stone is resting on the bottom of the swimming pool.The normal force of the bottom of the pool on the stone is equal to the

A)weight of the stone.

B)weight of the water displaced.

C)sum of the weight of the stone and the weight of the displaced water.

D)difference between the weight of the stone and the weight of the displaced water.

Q3) In an elastic solid there is a direct proportionality between strain and A)elastic modulus.

B)temperature.

C)cross-sectional area.

D)stress.

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Chapter 10: Thermal Physics

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Sample Questions

Q1) The Rankine temperature scale has Fahrenheit degrees and a zero point at absolute zero.What is the Fahrenheit temperature of 62 Rankine?

A)-397.7 °F

B)111.6 °F

C)211.2 °F

D)-238.7 °F

Q2) What thermodynamic quantity is held constant in Boyle's law?

A)pressure

B)volume

C)temperature

D)Both pressure and volume are each held constant.

Q3) An ideal gas is confined to a container with adjustable volume.The number of moles and temperature are constant.By what factor will the volume change if pressure triples?

A)1/9

B)1/3

C)3

D)9

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Chapter 11: Energy in Thermal Processes

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Sample Questions

Q1) A slice of bread contains about 125 kcal.If specific heat of a person were 1.00 kcal/kg °C,by how many °C would the temperature of a 65.0-kg person increase if all the energy in the bread were converted to heat?

A)3.85°C

B)0.96°C

C)1.92°C

D)2.40°C

E)1.44°C

Q2) Twenty grams of a solid at 70°C is place in 100 grams of a fluid at 20°C.Thermal equilibrium is reached at 30°C.The specific heat of the solid

A)is equal to that of the fluid.

B)is less than that of the fluid.

C)is more than that of the fluid.

D)cannot be compared to that of a material in a different phase.

Q3) Which of the following involves the greatest heat transfer?

A)One gram of steam at 100°C changing to water at 100°C.

B)One gram of ice at 0°C changing to water at 0°C.

C)One gram of water cooling from 100°C to 0°C.

D)One gram of ice heating from 100°C to 0°C.

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Page 13

Chapter 12: The Laws of Thermodynamics

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Sample Questions

Q1) How much thermal energy must be added to 7.10 moles of a diatomic ideal gas to raise its temperature 22.1 K?

A)652 J

B)1 960 J

C)4 570 J

D)3 260 J

E)3 520 J

Q2) Which of the following increases the internal energy of a solid metal rod?

A)raising it to a greater height

B)throwing it through the air

C)having the rod conduct heat

D)having the rod absorb heat

Q3) A thermodynamic process that happens very quickly tends to be

A)isobaric.

B)isothermal.

C)isovolumetric.

D)adiabatic.

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Chapter 13: Vibrations and Waves

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Sample Questions

Q1) If a long spring with spring constant k is cut into 4 equal lengths,what is the spring constant of each of the 4 shorter springs?

A)It is still k.

B)It is k/4.

C)It is 4k.

D)It is k/16.

E)It is k + 4.

Q2) A 2.00-m long piano string of mass 10.0 g is under a tension of 320 N.Find the speed with which a wave travels on this string.

A)506 m/s

B)253 m/s

C)126 m/s

D)358 m/s

E)80.0 m/s

Q3) Which is not an example of approximate simple harmonic motion?

A)A ball bouncing on the floor.

B)A child swinging on a swing.

C)A piano string that has been struck.

D)A car's radio antenna as it waves back and forth.

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Page 15

Chapter 14: Sound

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Sample Questions

Q1) If I<sub>0</sub> = 10 <sup>12</sup> W/m<sup>2</sup> is the threshold of hearing,a sound with intensity I<sub>1</sub> = 10 <sup>11</sup> W/m<sup>2</sup> will give a certain decibel level.Suppose a new sound has an intensity I<sub>2</sub> = 2I<sub>1</sub><sup>2</sup>/I<sub>0</sub>.What is the new decibel level?

A)2.3 dB

B)23 dB

C)100 dB

D)it will square the decibel level

E)1.0 dB

Q2) A C note (f = 256 Hz)is sounded on a piano.If the length of the piano wire is 1.8 m and its mass density is 2.2 g/m,what is the tension in the wire?

A)6.4E+1 N

B)1.4E+2 N

C)1.9E+3 N

D)1.1E+3 N

E)5.6E+2 N

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16

Chapter 15: Electric Forces and Fields

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Sample Questions

Q1) Relative distribution of charge density on the surface of a conducting solid depends on the

A)shape of the conductor.

B)mass density of the conductor.

C)type of metal of which the conductor is made.

D)strength of the earth's gravitational field.

Q2) A 6.6- C charge is placed at the origin and a second charge is placed on the x-axis at x = 0.1 m.If the resulting force on the second charge is 5.7 N in the positive x-direction,what is the value of its charge?

A)1.0 C

B)1.0 nC

C)-1.0 C

D)-1.0 nC

E)0 C

Q3) The electric field of a point charge has an inverse ________ behavior.

A)r<sup>1/2</sup>

B)r

C)r<sup>2</sup>

D)r<sup>3</sup>

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Page 17

Chapter 16: Electrical Energy and Capacitance

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Q1) Suppose two charges,one positive and one negative,are separated by a distance d. Where can two equipotential surfaces at different potentials intersect in the region near the charges?

A)halfway between the charges if the charges have the same magnitude

B)closer to the smaller negative charge than the larger positive charge if the charges are not equal

C)Equipotential surfaces at different potentials cannot intersect.

D)closer to the smaller positive charge than the larger negative charge if the charges are not equal

Q2) A 20- F capacitor is attached across a 1 000-V power supply.What is the net charge on the capacitor?

A)10 mC

B)20 mC

C)40 mC

D)none of the above

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Chapter 17: Current and Resistance

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Q1) The unit of electric resistance,the ohm,is equivalent to which of the following?

A)V/A

B)V m

C)A/s

D)A/m

Q2) How long is a wire made from 100 cm<sup>3</sup> of copper if its resistance is 4.0 ohms? The resistivity of copper is 1.7 × 10<sup>-5</sup> ·m.

A)4.9 m

B)1.7 × 10<sup>2</sup> m

C)2.6 × 10<sup>2</sup> m

D)1.5 × 10<sup>3</sup> m

E)24 m

Q3) A light bulb has resistance of 175 when operating at 100 V.Find the current in the light bulb.

A)1.8 A

B)0.33 A

C)0.57 A

D)0.76 A

E)1.3 A

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Page 19

Chapter 18: Direct-Current Circuits

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Q1) Three resistors with values R<sub>1</sub>,R<sub>2</sub> and R<sub>3</sub>,respectively,are connected in parallel.Which of the following expresses the total resistance,R<sub>T</sub>,of the three resistors when connected in parallel?

A)R<sub>T</sub> = R<sub>1</sub> + R<sub>2</sub> + R<sub>3</sub>

B)R<sub>T</sub> = (1/R<sub>1</sub> + 1/R<sub>2</sub> + 1/R<sub>3</sub>)

C)RT = R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub>

D)R<sub>T</sub> = (1/R<sub>1</sub> + 1/R<sub>2</sub> + 1/R<sub>3</sub>) <sup>1</sup>

Q2) In order for a circuit to respond quickly,its time constant should be short.In a circuit involving resistance and capacitance,which of the following choices would result in the shortest time constant?

A)R = 75 ,C = 75 F

B)R = 200 ,C = 200 F

C)R = 300 ,C = 75 F

D)R = 100 ,C = 30 F

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Chapter 19: Magnetism

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Q1) A circular loop carrying a current of 1.6 A is oriented in a magnetic field of 0.30 T.The loop has an area of 0.14 m<sup>2</sup> and is mounted on an axis,perpendicular to the magnetic field,which allows the loop to rotate.What is the torque on the loop when its plane is oriented at a 21° angle to the field?

A)2.4E-2 N m

B)6.3E-2 N m

C)3.7E-2 N m

D)5.6E-2 N m

E)9.4E-1 N m

Q2) The right-hand rule allows one to find a property of the interaction of a magnetic field with a charged particle.The right-hand rule applied to moving charges:

A)results in positive charges moving clockwise.

B)results in negative charges moving clockwise.

C)can be used for positive charges only.

D)gives the direction of the force on a charge moving in a magnetic field.

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Chapter 20: Induced Voltages and Inductance

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Q1) By what factor is the self-inductance of an air solenoid changed if only its number of coil turns,N,is multiplied by five?

A)1/5

B)5

C)15

D)25

E)1/25

Q2) A coil is placed in a magnetic field and has a flux <sub>B</sub> through it.The coil is stressed so that its area reduces to 75% of its original value.If the plane of the coil stays the same and the flux through it remains the same,how must the magnetic field change?

A)It must increase by 25%.

B)It must increase by 33%.

C)It must increase by 125%.

D)It must decrease by 25%.

Q3) The unit of inductance,the henry,is equivalent to A)V·s/A.

B)V/m.

C)J/C.

D)none of the units given.

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Chapter 21: Alternating-Current Circuits and Electromagnetic Waves

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Q1) What is the current in the primary?

A)30.5 mA

B)4.50 mA

C)32.8 mA

D)136 mA

Q2) In an AC series circuit the inductive reactance is 41.0 and the frequency is 137

Hz.What is the inductance in the circuit?

A)4.8E-2 H

B)1.5E-1 H

C)3.0E-1 H

D)4.7E-1 H

E)2.2E-1 H

Q3) The power dissipated in an AC series circuit increases as the phase angle approaches what value?

A)zero

B)45°

C)90°

D)180°

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Chapter 22: Reflection and Refraction of Light

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Q1) Monochromatic light hits a piece of glass.What happens to the wavelength in the glass as the index of refraction increases?

A)decreases

B)increases

C)remains constant

D)approaches 3 × 10<sup>8</sup> m

Q2) Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more.Which of the following is not true?

A)The index of refraction for color 2 is greater than that for color 1.

B)The two colors of light have different frequencies associated with them.

C)The speed of light for color 2 is greater than that for color 1 in this prism.

D)The wavelength for color 1 is different than that for color 2 in this prism.

Q3) What is the cause of refraction of a wave traveling from one medium to another?

A)There is a frequency change due to the change in the medium

B)There is a speed change due to the change in the medium.

C)There is a change in wave amplitude due to the change in the medium.

D)None of the above are associated with refraction.

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Chapter 23: Mirrors and Lenses

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Q1) Reducing the lens aperture size is a scheme one can use to reduce the occurrence of which of the following effects?

A)spherical aberration

B)mirages

C)chromatic aberration

D)light scattering

Q2) Parallel rays of light that hit a concave mirror will come together

A)at the center of curvature.

B)at the focal point.

C)at a point half way to the focal point.

D)at infinity.

Q3) An object is 20.0 cm from the surface of a spherical Christmas tree ornament that is 8.00 cm in diameter.What is the magnification of the image?

A)- 0.091

B)- 0.545

C)+ 0.091

D)+ 0.545

E)+ 0.364

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25

Chapter 24: Wave Optics

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Q1) A beam of polarized light of intensity I<sub>0</sub> passes through a sheet of ideal polarizing material.The polarization axis of the beam and the transmission axis of the sheet differ by 38°.What is the intensity of the emerging light?

A)0.79I<sub>0</sub>

B)0.62I<sub>0</sub>

C)0.91I<sub>0</sub>

D)0.90I<sub>0</sub>

E)0.96I<sub>0</sub>

Q2) Unpolarized light is passed through polarizer 1.The light then goes though polarizer 2 with its plane of polarization at 35.8° to that of polarizer 1.Polarizer 3 is placed after polarizer 2.Polarizer 3 has its plane of polarization at 58.8° to the plane of polarization of polarizer 2 and at 94.6° to that of polarizer 1.What fraction of the intensity of the original light gets though the last polarizer?

A)0.177

B)0.463

C)0.232

D)0.088

E)0.021

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26

Chapter 25: Optical Instruments

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Q1) A given individual is unable to see objects clearly when they are beyond 100 cm.What focal length lens should be used to correct this problem?

A) 100 cm

B) 33.3 cm

C) 20 cm

D)75 cm

E)100 cm

Q2) The pupil of a cat's eye narrows to a slit of width 0.5 mm in daylight.Assuming a wavelength of 500 nm,what is the angular resolution? (1 nm = 10 <sup>9</sup> m)

A)1 × 10 <sup>3</sup> rad

B)5 × 10 <sup>3</sup> rad

C)1 × 10 <sup>4</sup> rad

D)5 × 10 <sup>4</sup> rad

E)2.5 × 10 <sup>4</sup> rad

Q3) A lens is used as a magnifier.Which of the following statements is incorrect?

A)The lens is convex.

B)The dioptric power of the lens is positive.

C)The magnification is greatest when the eye focuses at the near point.

D)The focal length of the lens must be negative.

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Page 27

Chapter 26: Relativity

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Q1) According to the special theory of relativity,if a 30-year old astronaut sent on a space mission is accelerated to speeds close to that of light,and then returns to Earth after 20 years as measured on Earth,what would be his biological age upon returning?

A)less than 50 years

B)50 years

C)more than 50 years

D)exactly 100 years

Q2) Suppose an object whose mass is m is moving with a speed of 0.8c.Which is the correct expression for its kinetic energy?

A)K = mv<sup>2</sup>/2

B)K = mc<sup>2</sup>

C)K = ( 1)mc<sup>2</sup>

D)Answers a and c are both correct.

Q3) That the speed of light in a vacuum has the same value for all inertial frames is

A)inconsistent with the results of the Michelson-Morley experiment.

B)consistent with the results of the Michelson-Morley experiment.

C)not related to the results of the Michelson-Morley experiment.

D)not true.

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Chapter 27: Quantum Physics

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94 Verified Questions

94 Flashcards

Source URL: https://quizplus.com/quiz/67699

Sample Questions

Q1) The de Broglie wavelength of a 0.069 kg golf ball is 4.67 × 10 <sup>34</sup>m.What is its speed? (h = 6.63 × 10 <sup>34</sup> J s)

A)10 m/s

B)21 m/s

C)3.1 m/s

D)90 m/s

E)4.5 m/s

Q2) Planck's quantum theory is compatible with the experimental data related to which of the following?

A)blackbody radiation

B)the photoelectric effect

C)line spectra emitted by hydrogen gas

D)all of the above

Q3) What is the energy of the scattered x-rays?

A)343 keV

B)300 keV

C)400 keV

D)2410 keV

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29

Chapter 28: Atomic Physics

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73 Verified Questions

73 Flashcards

Source URL: https://quizplus.com/quiz/67700

Sample Questions

Q1) Of the various wavelengths emitted from a hydrogen gas discharge tube,those that are associated with transitions from higher levels down to the n = 1 level produce which of the following?

A)infrared

B)visible

C)mixture of infrared and visible

D)ultraviolet

Q2) Characteristic K x-rays are the result of:

A)inner electron transitions.

B)outer electron transitions.

C)nuclear electron states.

D)buckytubes.

Q3) If a hydrogen atom,originally in its ground state of energy -13.6 eV,absorbs a photon of energy 15.9 eV,what is the resulting kinetic energy of the electron if the proton has negligible kinetic energy?

A)13.6 eV

B)-2.30 eV

C)2.30 eV

D)15.9 eV

E)Such a photon cannot be absorbed in this case.

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Chapter 29: Nuclear Physics

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88 Verified Questions

88 Flashcards

Source URL: https://quizplus.com/quiz/67701

Sample Questions

Q1) The isotope <sup>64</sup>Zn has a nuclear radius of 4.8 × 10 <sup>15</sup> m.Which of the following is the mass number of an isotope for which the nuclear radius is 3.6 × 10 <sup>15</sup> m?

A)3

B)1

C)9

D)27

E)48

Q2) An alpha particle (mass = 6.68 × 10 <sup>27</sup> kg)is emitted from a radioactive nucleus with a kinetic energy of 4.55 MeV.How fast is the alpha particle moving in m/s? (1 MeV = 1.6 × 10 <sup>13</sup> J)

A)3.84E+3 m/s

B)1.48E+7 m/s

C)1.04E+7 m/s

D)3.82E+7 m/s

E)5.11E+6 m/s

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Chapter 30: Nuclear Energy and Elementary Particles

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90 Verified Questions

90 Flashcards

Source URL: https://quizplus.com/quiz/67702

Sample Questions

Q1) Of the quarks u,d,c,s,t,and b,which have positive fractional electronic charge?

A)u,d,c

B)d,s,b

C)s,t,b

D)u,c,t

Q2) The size and sign of the charge on an electron is the same as that for A)a positron.

B)an antiproton.

C)an antineutron.

D)an antineutrino.

Q3) How fast is an ion of deuterium moving,assuming rms speed,if it is in a plasma with a temperature of 190 × 10<sup>6</sup> K? (k<sub>B</sub> = 1.38 × 10<sup>-23</sup> J/K and m<sub>D</sub> = 2 × 1.66 × 10<sup>-27</sup> kg)

A)1.54E+6 m/s

B)1.54E+4 m/s

C)2.37E+12 m/s

D)8.89E+5 m/s

E)2.80E+6 m/s

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32

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