Physical Science for Engineers
Chapter Exam Questions
Course Introduction
Physical Science for Engineers offers a comprehensive introduction to the fundamental principles of physics and chemistry with direct applications to engineering problems. The course covers topics such as mechanics, thermodynamics, electricity and magnetism, materials science, and basic chemical processes. Emphasis is placed on developing analytical and problem-solving skills and understanding the scientific concepts that underpin modern engineering practice. Through lectures, laboratory exercises, and real-world examples, students gain the knowledge necessary to analyze, design, and innovate in various engineering fields.
Recommended Textbook
Physics 5th Edition by James S. Walker
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Page 2
Chapter 1: Introduction to Physics
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Q1) The radius of the earth is 3963 mi.Which one of the following numbers is closest to the surface area of the earth? (1.0 mi = 1609 m)
A)4.9 × 10<sup>7</sup> m<sup>2</sup>
B)1.3 × 10<sup>14</sup> m<sup>2</sup>
C)2.6 × 10<sup>14</sup> m<sup>2</sup>
D)5.1 × 10<sup>14</sup> m<sup>2</sup>
Answer: D
Q2) How many significant figures are in the number 0.0037010?
A)four
B)five
C)six
D)seven
E)eight Answer: B
Q3) The number of significant figures in 10001 is A)two. B)three. C)five. D)six. Answer: C
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Chapter 2: One-Dimensional Kinematics
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Q1) To determine the height of a bridge above the water,a person drops a stone and measures the time it takes for it to hit the water.If the time is 2.3 s,what is the height of the bridge? Neglect air resistance.
A)10 m
B)14 m
C)26 m
D)32 m
E)52 m
Answer: C
Q2) Which of the following quantities has units of a displacement? (There could be more than one correct choice. )
A)32 ft/s<sup>2</sup> vertically downward
B)40 km southwest
C)9.8 m/s<sup>2</sup>
D)-120 m/s
E)186,000 mi
Answer: B,E
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Chapter 3: Vectors in Physics
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Sample Questions
Q1) The magnitude of the resultant of two vectors cannot be less than the magnitude of either of those two vectors.
A)True
B)False
Answer: False
Q2) A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s.During this swim,she is swept downstream 480 m.How fast can she swim in still water?
A)0.50 m/s
B)0.80 m/s
C)1.2 m/s
D)1.4 m/s
E)1.8 m/s
Answer: A
Q3) A velocity vector has components 36 m/s westward and 22 m/s northward.What are the magnitude and direction of this vector?
Answer: 42 m/s at 31° north of west
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Chapter 4: Two-Dimensional Kinematics
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Sample Questions
Q1) A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically.Which object is traveling faster when it hits the level ground below if neither of them experiences any air resistance?
A)It is impossible to tell because we do not know their masses.
B)the stone
C)the ball
D)Both are traveling at the same speed.
Q2) A hockey puck slides off the edge of a horizontal platform with an initial velocity of 28.0 m/s horizontally in a city where the acceleration due to gravity is 9.81 m/s<sup>2</sup>.The puck experiences no significant air resistance as it falls.The height of the platform above the ground is 2.00 m.What is the angle below the horizontal of the velocity of the puck just before it hits the ground?
A)77.2°
B)72.6°
C)12.8°
D)12.6°
E)31.8°
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Page 6
Chapter 5: Newtons Laws of Motion
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Q1) If the rockets of a spaceship in outer space (far from all gravity)suddenly lose power and go off,the spaceship will gradually slow to a stop.
A)True
B)False
Q2) You are standing in a moving bus,facing forward,when you suddenly slide forward as the bus comes to an immediate stop.What force caused you to slide forward?
A)gravity
B)the normal force due to your contact with the floor of the bus
C)the force due to friction between you and the floor of the bus
D)There is not a force causing you to slide forward.
Q3) In a collision between a huge SUV and a small hybrid car,the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV.
A)True
B)False
Q4) In order to lift a bucket of concrete,you must pull up harder on the bucket than the bucket pulls down on you.
A)True
B)False
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Page 7
Chapter 6: Applications of Newtons Laws
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Sample Questions
Q1) Pulling out of a dive,the pilot of an airplane guides his plane into a vertical circle.At the bottom of the dive,the speed of the airplane is 320 m/s.What is the smallest radius allowable for the vertical circle if the pilot's apparent weight is not to exceed 7.0 times his true weight?
A)1700 m
B)1500 m
C)2200 m
D)230 m
E)42 m
Q2) One way that future space stations may create artificial gravity is by rotating the station.Consider a cylindrical space station 380 m in diameter that is rotating about its longitudinal axis.Astronauts walk on the inside surface of the space station.How long will it take for each rotation of the cylinder if it is to provide "normal" gravity for the astronauts?
A)28 s
B)39 s
C)6.2 s
D)4.4 s
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Chapter 7: Work and Kinetic Energy
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Q1) A stone is moving on a rough level surface.It has 24 J of kinetic energy,and the friction force on it is a constant 0.50 N.What is the maximum distance it can slide?
A)2.0 m
B)12 m
C)24 m
D)48 m
Q2) Three cars (car F,car G,and car H)are moving with the same speed and slam on their brakes.The most massive car is car F,and the least massive is car H.If the tires of all three cars have identical coefficients of kinetic friction with the road surface,which car travels the longest distance to skid to a stop?
A)They all travel the same distance in stopping.
B)car F
C)car G
D)car H
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Chapter 8: Potential Energy and Conservation of Energy
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Sample Questions
Q1) A heavy rock and a light rock are dropped from the same height and experience no significant air resistance as they fall.Which of the following statements about these rocks are correct? (There could be more than one correct choice. )
A)Both rocks have the same kinetic energy when they reach the ground.
B)Both rocks have the same speed when they reach the ground.
C)The heavier rock reaches the ground before the lighter rock.
D)Just as they were released,both rocks had the same amount of gravitational potential energy.
E)When they reach the ground,the heavier rock has more kinetic energy than the lighter rock.
Q2) A stone is held at a height h above the ground.A second stone with four times the mass of the first one is held at the same height.The gravitational potential energy of the second stone compared to that of the first stone is
A)one-fourth as much.
B)one-half as much.
C)twice as much.
D)four times as much.
E)the same.
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10
Chapter 9: Linear Momentum and Collisions
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Q1) A dinner plate falls vertically to the floor and breaks up into three pieces,which slide horizontally along the floor.Immediately after the impact,a 320-g piece moves along the +x-axis with a speed of 2.00 m/s and a 355-g piece moves along the +y-axis with a speed of 1.50 m/s.The third piece has a mass of 100 g.In what direction relative to the +x-axis does the third piece move?
A)216.9° from the +x-axis
B)219.8° from the +x-axis
C)36.9° from the +x-axis
D)39.9° from the +x-axis
E)39.8° from the +x-axis
Q2) You are standing on a skateboard,initially at rest.A friend throws a very heavy ball towards you.You have two choices about what to do with the ball: either catch the ball or deflect it back toward your friend with the same speed as it was originally thrown.Which choice should you make in order to maximize your speed on the skateboard?
A)Catch the ball.
B)Deflect the ball back.
C)Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the ball.
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Chapter 10: Rotational Kinematics and Energy
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Q1) A uniform solid disk is released from rest and rolls without slipping down an inclined plane that makes an angle of 25° with the horizontal.What is the forward speed of the disk after it has rolled 3.0 m,measured along the plane?
A)2.0 m/s
B)3.5 m/s
C)4.1 m/s
D)5.7 m/s
E)6.3 m/s
Q2) A triatomic molecule is oriented as follows along the x-axis: mass m is at the origin,mass 2m is at x = a,and,mass 3m is at x = 2a.What is the moment of inertia of this molecule about the y-axis?
A)2ma<sup>2</sup>
B)3ma<sup>2</sup>
C)12ma<sup>2</sup>
D)14ma<sup>2</sup>
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Chapter 11: Rotational Dynamics and Static Equilibrium
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Sample Questions
Q1) To determine the location of the center of mass (or center of gravity)of a car,the car is driven over a scale on a horizontal floor.When the front wheels are over the scale,the weight recorded by the scale is 5800 N,and when the rear wheels are over the scale,the scale reads 6500 N.The distance between the front and rear wheels is measured to be 3.20 m.How far behind the front wheels is the center of mass located?
A)0.845 m
B)1.50 m
C)1.59 m
D)1.69 m
E)1.72 m
Q2) The drive chain in a bicycle is applying a torque of 0.850 N m to the wheel of the bicycle.You can treat the wheel as a thin uniform hoop (or ring)with a mass of 0.750 kg and a radius of 33.0 cm.What is the angular acceleration of the wheel?
A)10.4 rad/s<sup>2</sup>
B)20.8 rad/s<sup>2</sup>
C)5.20 rad/s<sup>2</sup>
D)3.43 rad/s<sup>2</sup>
E)1.06 rad/s<sup>2</sup>
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Chapter 12: Gravity
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Q1) Three identical 50-kg balls are held at the corners of an equilateral triangle,30 cm on each side.If one of the balls is released,what is the magnitude of its initial acceleration if the only forces acting on it are the gravitational forces due to the other two masses? (G = 6.67 × 10<sup>-11</sup> N m<sup>2</sup>/kg<sup>2</sup>)
A)3.7 × 10<sup>-8</sup> m/s<sup>2</sup>
B)2.5 × 10<sup>-8</sup> m/s<sup>2</sup>
C)1.9 × 10<sup>-8</sup> m/s<sup>2</sup>
D)4.2 × 10<sup>-8</sup> m/s<sup>2</sup>
E)6.4 × 10<sup>-8</sup> m/s<sup>2</sup>
Q2) The mass of Pluto is 1.31 × 10<sup>22</sup> kg and its radius is 1.15 × 10<sup>6</sup>
m.What is the acceleration of a freely-falling object at the surface of Pluto if it has no atmosphere? (G = 6.67 × 10<sup>-11</sup> N m<sup>2</sup>/kg<sup>2</sup>)
A)0.661 m/s<sup>2</sup>
B)9.81 m/s<sup>2</sup>
C)1.62 m/s<sup>2</sup>
D)3.72 m/s<sup>2</sup>
E)0.140 m/s<sup>2</sup>
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Chapter 13: Oscillations About Equilibrium
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Sample Questions
Q1) A 3.42-kg stone hanging vertically from an ideal spring on the earth undergoes simple harmonic motion at a place where g = 9.80 m/s<sup>2</sup>.If the force constant (spring constant)of the spring is 12 N/m. Find the period of oscillation of this setup on a planet where g = 1.60 m/s<sup>2</sup>.
A)3.35 s
B)2.51 s
C)4.36 s
D)5.70 s
Q2) A mass on a spring undergoes SHM.When the mass is at its maximum distance from the equilibrium position,which of the following statements about it are true? (There could be more than one correct choice. )
A)Its acceleration is zero.
B)Its speed is zero.
C)Its elastic potential energy is zero.
D)Its kinetic energy is a maximum.
E)Its total mechanical energy is zero.
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15
Chapter 14: Waves and Sound
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Sample Questions
Q1) Two tuning forks have frequencies of 440 and 522 Hz.What is the beat frequency if both are sounding simultaneously?
A)962 Hz
B)481 Hz
C)82 Hz
D)55 Hz
E)41 Hz
Q2) Find the first three harmonics of a string of linear mass density 2.00 g/m and length 0.600 m when the tension in it is 50.0 N.
A)132 Hz,264 Hz,395 Hz
B)66 Hz,132 Hz,198 Hz
C)264 Hz,528 Hz,792 Hz
D)none of the above
Q3) If the frequency of a violin string is to be increased by 20%,what change in tension must be applied?
A)44%
B)20%
C)4.5%
D)10%
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Page 16
Chapter 15: Fluids
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Q1) A plastic block of dimensions 2.00 cm × 3.00 cm × 4.00 cm has a mass of 30.0 g.What is its density?
A)0.80 g/cm<sup>3</sup>
B)1.20 g/cm<sup>3</sup>
C)1.25 g/cm<sup>3</sup>
D)1.60 g/cm<sup>3</sup>
Q2) A cylindrical rod of length 12 cm and diameter 2.0 cm will just barely float in water of density 1000 kg/m<sup>3</sup>.What is its mass?
A)38 g
B)75 g
C)150 g
D)300 g
Q3) An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water of density 1000 kg/m<sup>3</sup>.What is the density of the object?
A)6000 kg/m<sup>3</sup>
B)7000 kg/m<sup>3</sup>
C)8000 kg/m<sup>3</sup>
D)9000 kg/m<sup>3</sup>
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Chapter 16: Temperature and Heat
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Q1) By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24°C to -16°C? The coefficient of linear thermal expansion for this concrete is 1.0 × 10<sup>-5</sup> K<sup>-1</sup>.
A)0.50 cm
B)0.72 cm
C)1.2 cm
D)1.5 cm
Q2) The volume coefficient of thermal expansion for gasoline is 950 × 10<sup>-6</sup> K<sup>-1</sup>.By how many cubic centimeters does the volume of 1.00 L of gasoline change when the temperature rises from 30°C to 50°C?
A)6.0 cm<sup>3</sup>
B)12 cm<sup>3</sup>
C)19 cm<sup>3</sup>
D)37 cm<sup>3</sup>
Q3) A temperature change of 20°C corresponds to a Fahrenheit temperature change of A)68°F.
B)11°F.
C)36°F.
D)18°F.
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Page 18
Chapter 17: Phases and Phase Changes
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Q1) Two experimental runs are performed to determine the calorimetric properties of an alcohol which has a melting point of -10° C.In the first run,a 200-g cube of frozen alcohol,at the melting point,is added to 300 g of water at 20°C in a styrofoam container.When thermal equilibrium is reached,the alcohol-water solution is at a temperature of 5°C.In the second run,an identical cube of alcohol is added to 500 g of water at 20°C and the temperature at thermal equilibrium is 10°C.The specific heat capacity of water is 4190 J/kg K.Assume no heat is exchanged with the styrofoam container and the surroundings.What is the specific heat capacity of the alcohol?
A)1700 J/kg K
B)1900 J/kg K
C)2100 J/kg K
D)2300 J/kg K
E)2500 J/kg K
Q2) Two wires are made out of the same metal,but one wire is twice as long as the other wire.Which wire will have the greatest elastic modulus?
A)the shorter wire
B)the longer wire
C)It will be the same for both wires.
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Chapter 18: The Laws of Thermodynamics
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Q1) An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat.What is the change in the internal (thermal)energy of the athlete?
A)-225 kJ
B)-1075 kJ
C)1075 kJ
D)225 kJ
E)276 kJ
Q2) A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a constant pressure of 110 kPa.How much work is done by the gas during this expansion?
A)3.85 kJ
B)10.4 kJ
C)3850 kJ
D)10.4 MJ
E)3.85 MJ
Q3) When water at 0°C freezes,the entropy of the water
A)increases.
B)decreases.
C)remains constant.
D)could either increase or decrease;it depends on other factors.
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Page 20
Chapter 19: Electric Charges, Forces, and Fields
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Q1) Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above it.How far above the electron would the proton have to be? (k = 1/4 <sub>0</sub> = 9.0 × 10<sup>9</sup> N m<sup>2</sup>/C<sup>2</sup>,e = 1.6 × 10<sup>-19</sup> C,m<sub>proton</sub> = 1.67 × 10<sup>-27</sup> kg,m<sub>electron</sub> = 9.11 × 10<sup>-31</sup> kg)
A)1.5 m
B)2.3 m
C)3.7 m
D)4.6 m
E)5.1 m
Q2) Two point charges each experience a 1-N electrostatic force when they are 2 cm apart.If they are moved to a new separation of 8 cm,what is the magnitude of the electric force on each of them?
A)2 N
B)1/2 N
C)1/4 N
D)1/8 N
E)1/16 N
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Chapter 20: Electric Potential and Electric
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Q1) As a proton moves in the direction the electric field lines
A)it is moving from low potential to high potential and gaining electric potential energy.
B)it is moving from low potential to high potential and losing electric potential energy.
C)it is moving from high potential to low potential and gaining electric potential energy.
D)it is moving from high potential to low potential and losing electric potential energy.
E)both its electric potential and electric potential energy remain constant.
Q2) A tiny particle with charge + 5.0 C is initially moving at 55 m/s.It is then accelerated through a potential difference of 500 V.How much kinetic energy does this particle gain during the period of acceleration?
A)1.0 × 10<sup>4</sup> J
B)2.5 × 10<sup>-3</sup> J
C)100 J
D)2500 J
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Chapter 21: Electric Current and Direct-Current Circuits
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Q1) Calculate the current through a 10.0-m long 22-gauge nichrome wire with a radius of 0.321 mm if it is connected across a 12.0-V battery.The resistivity of the nichrome is 1.00 × 10<sup>-6</sup> m.
A)30.9 A
B)61.8 A
C)0.388 A
D)0.776 A
Q2) If a quantity you calculated has units of m what is that quantity?
A)potential
B)resistivity
C)resistance
D)capacitance
E)charge
Q3) The power rating of a 400- resistor is 0.25 W.What is the maximum voltage you can safely connect across its ends?
A)10 V
B)20 V
C)30 V
D)40 V
E)50 V
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Chapter 22: Magnetism
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Q1) Consider an ideal solenoid of length L,N windings,and radius b (L is much longer than b).A current I is flowing through the wire windings.If the length of the solenoid becomes twice as long (to 2L),but all other quantities remained the same,the magnetic field inside the solenoid will
A)remain the same.
B)become twice as strong as initially.
C)become one-half as strong as initially.
D)become four times as strong as initially.
E)become one-fourth as strong as initially.
Q2) Two long parallel wires are placed side-by-side on a horizontal table and carry current in the same direction.The current in one wire is 20 A,and the current in the other wire is 5 A.If the magnetic force on the 20-A wire has magnitude F,what is the magnitude of the magnetic force on the 5-A wire? No external magnetic fields are present.
A)4F
B)2F
C)F
D)F/2
E)F/4
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Page 24
Chapter 23: Magnetic Flux and Faradays Law of Induction
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Q1) The primary of an ideal transformer has 100 turns and its secondary has 200 turns.Neglecting frictional losses,if the power input to the primary is 100 W,we can expect the power output of the secondary to be
A)50 W.
B)100 W.
C)200 W.
D)none of the given answers.
Q2) A transformer is a device used to
A)transform an alternating current into a direct current.
B)transform a direct current into an alternating current.
C)increase or decrease an ac voltage.
D)increase or decrease a dc voltage.
Q3) A resistor and an inductor are connected in series to an ideal battery of constant terminal voltage.At the moment contact is made with the battery,the voltage across the resistor is
A)greater than the battery's terminal voltage.
B)equal to the battery's terminal voltage.
C)less than the battery's terminal voltage,but not zero.
D)zero.
E)equal to the voltage across the inductor.
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Chapter 24: Alternating-Current Circuits
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Q1) A series ac circuit has a resonance frequency of 9.0 kHz.If the inductor in the circuit has a value of 2.0 H,and the resistance is 75 ,what is the capacitance of the circuit?
A)0.16 pF
B)156 pF
C)6.2 pF
D)17.7 pF
Q2) A series circuit contains an 80- F capacitor,a 0.020-H inductor,and a switch.The resistance of the circuit is negligible.Initially,the switch is open,the capacitor voltage is 50 V,and the current in the inductor is zero.At time t = 0 s,the switch is closed.How long after closing the switch does the magnetic energy in the inductor first reach its maximum value?
A)2.0 ms
B)4.0 ms
C)6.0 ms
D)8.0 ms
E)10 ms
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Chapter 25: Electromagnetic Waves
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Q1) Which one of the following lists gives the correct order of the electromagnetic spectrum from low to high frequencies?
A)radio waves,infrared,microwaves,ultraviolet,visible,x-rays,gamma rays
B)radio waves,ultraviolet,x-rays,microwaves,infrared,visible,gamma rays
C)radio waves,microwaves,infrared,visible,ultraviolet,x-rays,gamma rays
D)radio waves,microwaves,visible,x-rays,infrared,ultraviolet,gamma rays
E)radio waves,infrared,x-rays,microwaves,ultraviolet,visible,gamma rays
Q2) An 800-kHz sinusoidal radio signal is detected at a point 6.6 km from the transmitter tower.The electric field amplitude of the signal at that point is 0.780 V/m.Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed.What is the amplitude of the magnetic field of the signal at that point? ( <sub>0</sub> = 8.85 × 10<sup>-12</sup> C<sup>2</sup>/N m<sup>2</sup>,c = 3.0 × 10<sup>8</sup> m/s, <sub>0</sub> = 4 × 10<sup>-7</sup> T m/A)
A)2.6 nT
B)2.1 nT
C)1.6 nT
D)3.1 nT
E)3.6 nT
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Page 27
Chapter 26: Geometrical Optics
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Sample Questions
Q1) An object is 5.7 cm from a spherical concave mirror.If the image is 4.7 cm tall and 10 cm from the mirror,how tall is the object?
A)12 cm
B)11 cm
C)8.2 cm
D)2.7 cm
Q2) Light enters glass from air.The angle of refraction will be
A)greater than the angle of incidence.
B)equal to the angle of incidence.
C)less than the angle of incidence.
Q3) A concave mirror having a focal length of magnitude 5.0 cm forms an image 4.0 cm behind the mirror.Where is the object for this image?
A)2.2 cm in front of the mirror
B)2.2 cm behind the mirror
C)9.0 cm in front of the mirror
D)1.0 cm behind the mirror
E)20 cm behind the mirror
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Chapter 27: Optical Instruments
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Sample Questions
Q1) The focal lengths of the objective lens and the eyepiece in a microscope are 0.29 cm and 2.50 cm,respectively.An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm.The magnitude of the final overall magnification of the microscope is closest to A)100.
B)200.
C)300.
D)410.
E)500.
Q2) The length of a telescope is 2.20 m and the focal length of the eyepiece is 1.9 cm.What is the focal length of the objective lens?
A)41 cm
B)45 cm
C)111 cm
D)218 cm
E)16 cm
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Chapter 28: Physical Optics: Interference and Diffraction
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Q1) Light has wavelength 600 nm in a vacuum.It passes into glass,which has an index of refraction of 1.5.What is the frequency of the light inside the glass? (c = 3.0 × 10<sup>8</sup> m/s)
A)3.3 × 10<sup>14</sup> Hz
B)5.0 × 10<sup>14</sup> Hz
C)3.3 × 10<sup>5</sup> Hz
D)5.0 × 10<sup>5</sup> Hz
Q2) If a diffraction grating is heated (without damaging it)and therefore expands,what happens to the angular location of the first-order maximum?
A)It moves toward the centerline.
B)It moves away from the centerline.
C)It doesn't change.
Q3) Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P.If the maximum constructive interference is to occur at point P,the two beams must travel paths that differ by
A)a whole number of wavelengths.
B)an odd number of half-wavelengths.
C)a whole number of half-wavelengths.
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Chapter 29: Relativity
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Q1) A pion is an unstable particle that has a mean lifetime of 2.55 × 10<sup>-8</sup> s.This is the time interval between its creation in a nuclear process and its extinction into decay products,as measured in a frame of reference at rest with respect to the pion.An average pion is traveling at 0.230c relative to Earth.How far does it travel in its lifetime,relative to Earth?
A)2.07 m
B)1.81 m
C)2.23 m
D)3.22 m
E)3.50 m
Q2) Consider three galaxies,Alpha,Beta and Gamma.An astronomer in Beta sees each of the other two galaxies moving away from her in opposite directions at 0.70c.At what speed would an observer in Alpha see the galaxy Beta moving?
A)0.82c
B)0.70c
C)0.94c
D)0.35c
E)0.57c
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Chapter 30: Quantum Physics
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Q1) If the wavelength of a photon in vacuum is the same as the de Broglie wavelength of an electron,which one is traveling faster through space?
A)The electron because it has more mass.
B)The photon because photons always travel through space faster than electrons.
C)They both have the same speed.
Q2) When a metal is illuminated by light,photoelectrons are observed provided that the wavelength of the light is less than 520 nm.What is the metal's work function? (c = 3.00 × 10<sup>8</sup> m/s,h = 6.626 × 10<sup>-34</sup> J s,1 eV = 1.60 × 10<sup>-19</sup> J)
A)2.4 eV
B)2.6 eV
C)2.8 eV
D)3.0 eV
Q3) A person of mass 50 kg has a de Broglie wavelength of 4.4 × 10<sup>-36</sup> m while jogging.How fast is she running? (h = 6.626 × 10<sup>-34</sup> J s)
A)2.0 m/s
B)3.0 m/s
C)4.0 m/s
D)5.0 m/s
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Chapter 31: Atomic Physics
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Sample Questions
Q1) The electron spin quantum number can have values of
A)-1/2,-1,0,+1,+1/2.
B)-1/2,-1,+1,+1/2.
C)-1/2,0,+1/2.
D)-1/2,+1/2.
E)only +1/2.
Q2) What is the maximum number of electrons that can occupy the g subshell?
A)10
B)14
C)18
D)22
Q3) What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2? (c = 3.00 × 10<sup>8</sup> m/s,h = 6.626 × 10<sup>-34</sup> J s,1 eV = 1.60 × 10<sup>-19 </sup>J)
A)243 nm
B)486 nm
C)556 nm
D)312 nm
E)609 nm
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Page 33
Chapter 32: Nuclear Physics and Nuclear Radiation
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Q1) A <sup>-</sup> particle is also known as A)an electron.
B)a positron.
C)a helium nucleus.
D)a high-energy photon.
Q2) In <sup>-</sup> decay,the number of protons in the nucleus is
A)decreased by 1.
B)decreased by 2.
C)increased by 1.
D)increased by 2.
E)remains unchanged.
Q3) In the fission reaction <sup>235</sup>U + <sup>1</sup>n <sup>141</sup>Ba + <sup>92</sup>Kr + x <sup>1</sup>n,what is the number x of neutrons produced?
A)0
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