Physics for Engineers
Exam Solutions
Course Introduction
Physics for Engineers is designed to provide engineering students with a foundational understanding of physics concepts and principles relevant to their field. The course explores topics such as mechanics, thermodynamics, waves, electricity and magnetism, and modern physics, with an emphasis on real-world engineering applications. Through lectures, laboratory experiments, and problem-solving exercises, students develop analytical and critical thinking skills required for tackling engineering challenges. The course equips students with the conceptual and quantitative tools necessary to understand the physical phenomena underlying engineering systems and technological innovations.
Recommended Textbook
Physics 10th Edition by John D. Cutnell
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10 Chapters
662 Verified Questions
662 Flashcards
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Page 2
Chapter 11: Fluids
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65 Verified Questions
65 Flashcards
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Sample Questions
Q1) Complete the following statement: Bernoulli's principle is a statement of
A)hydrostatic equilibrium.
B)thermal equilibrium in fluids.
C)mechanical equilibrium in fluids.
D)energy conservation in dynamic fluids.
E)momentum conservation in dynamic fluids.
Answer: D
Q2) A balloon inflated with helium gas (density = 0.2 kg/m³)has a volume of 6 × 10<sup>-</sup>³ m³.If the density of air is 1.3 kg/m³,what is the buoyant force exerted on the balloon?
A)0.01 N
B)0.08 N
C)0.8 N
D)1.3 N
E)7.8 N
Answer: B
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Chapter 13: The Transfer of Heat
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42 Verified Questions
42 Flashcards
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Sample Questions
Q1) Complete the following statement: The transfer of heat by convection will occur
A)only in metals.
B)only in a vacuum.
C)only in non-metallic solids.
D)with or without the presence of matter.
E)only in the presence of a liquid or a gas.
Answer: E
Q2) The power radiated by a distant star is 6.2 × 10² W.The radius of the star,which may be considered a perfect radiator,is 1.06 × 10¹ m.Determine the surface temperature of the star.
A)2970 K
B)4630 K
C)7440 K
D)8710 K
E)9970 K
Answer: A
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4
Chapter 14: The Ideal Gas Law and Kinetic Theory
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55 Verified Questions
55 Flashcards
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Sample Questions
Q1) In the space between two stars,the temperature of a gas cloud is 12 K;and the density of the gas is 1.2 × 10<sup>-</sup> atom/m³.What is the absolute pressure of the gas?
A)2.0 × 10<sup>-</sup>³ Pa
B)1.2 × 10<sup>-</sup>² Pa
C)2.0 × 10<sup>-</sup>¹ Pa
D)1.2 × 10<sup>-</sup> Pa
E)1.4 × 10<sup>-</sup> Pa
Answer: A
Q2) Consider two ideal gases,A and B,at the same temperature.The rms speed of the molecules of gas A is twice that of gas B.How does the molecular mass of A compare to that of B?
A)The molecular mass of A is twice that of B.
B)The molecular mass of A is one half that of B.
C)The molecular mass of A is 1.4 times that of B.
D)The molecular mass of A is one fourth that of B.
E)The molecular mass of A is four times that of B.
Answer: D
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Chapter 15: Thermodynamics
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Sample Questions
Q1) An engine is used to lift a 2700-kg truck to a height of 3.0 m at constant speed.In the lifting process,the engine received 4.18 × 10 J of heat from the fuel burned in its interior.What is the efficiency of the engine?
A)0.19
Q2) An isobaric process is represented on a pressure-volume graph by which one of the following curves?
A)a parabola
B)a hyperbola
C)a vertical line
D)a circle
E)a horizontal line
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Chapter 17: The Principle of Linear Superposition and
Interference Phenomena
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51 Verified Questions
51 Flashcards
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Sample Questions
Q1) A pebble is dropped in a lake;and it produces ripples with a frequency of 0.50 Hz.When should a second pebble be dropped at the same place to produce destructive interference?
A)0.50 s after the first
B)0.75 s after the first
C)1.0 s after the first
D)1.5 s after the first
E)2.0 s after the first
Q2) The beat period occurring when two tuning forks are vibrating is 0.333 s.One of the forks is known to vibrate at 588.0 Hz.What are the possible vibration frequencies of the second tuning fork?
A)587.7 or 588.3 Hz
B)586.0 or 592.0 Hz
C)580.3 or 596.7 Hz
D)585.0 or 591.0 Hz
E)584.5 Hz or 591.5 Hz
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Chapter 20: Electric Circuits
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Sample Questions
Q1) Complete the following statement: The unit kilowatt - hour measures A)current.
B)energy.
C)power.
D)potential drop.
E)voltage.
Q2) Which one of the wires carries the smallest current when they are connected to identical batteries?
A)wire E
B)wire D
C)wire C
D)wire B
E)wire A
Q3) Which one of the following quantities can be converted to kilowatt - hours (kWh)?
A)2.0 A
B)8.3 V
C)5.8 J
D)9.6 W
E)6.2 C/V
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Page 8
Chapter 22: Electromagnetic Induction
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Sample Questions
Q1) A 0.60-T magnetic field is directed perpendicular to the plane of a circular loop of radius 0.40 m.What is the magnitude of the magnetic flux through the loop?
A)0.049 Wb
B)0.098 Wb
C)0.24 Wb
D)0.30 Wb
E)zero Wb
Q2) Assume S has been closed for a long time.Which one of the following statements is true when coil 1 and its core are moved toward point B?
A)There is no induced current in r.
B)There is a magnetic field in coil 1 that points toward B.
C)There is an induced current in R that flows from left to right.
D)There is an induced current in R that flows from right to left.
E)There is an induced magnetic field in coil 2 that points toward B.
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9
Chapter 25: The Refl Ection of Light: Mirrors
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Sample Questions
Q1) Which one of the following statements concerning a virtual image produced by a mirror is true?
A)A virtual image is always larger than the object.
B)A virtual image is always smaller than the object.
C)A virtual image is always upright relative to the object.
D)A virtual image is always inverted relative to the object.
E)A virtual image can be photographed or projected onto a screen.
Q2) Determine the image height in the concave mirror.
A)0.5
B)1.5
C)2.0
D)3.0
E)4.5
Q3) Makenzie walks directly toward a plane mirror at a speed of 0.30 m/s.Determine the speed of the image relative to her.
A)0.15 m/s
B)0.30 m/s
C)0.60 m/s
D)0.90 m/s
E)1.2 m/s
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Chapter 26: The Refraction of Light: Lenses and Optical Instruments
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102 Flashcards
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Sample Questions
Q1) A physics student desires to create a beam of light that consists of parallel rays.Which one of the following arrangements would allow her to accomplish this task?
A)A light bulb is placed at the focal point of a convex mirror.
B)A light bulb is placed at the focal point of a diverging lens.
C)A light bulb is placed at the focal point of a converging lens.
D)A light bulb is located at twice the focal length from a concave mirror.
E)A light bulb is located at twice the focal length from a converging lens.
Q2) Which one of the following statements best explains why chromatic aberration occurs in lenses,but not in mirrors?
A)The shape of the mirror prevents chromatic aberration.
B)The thickness of a lens varies from top to bottom.
C)The frequency of light changes when it passes through glass.
D)The angle of incidence varies over the surface of a lens for incident parallel rays of light.
E)Different colors of light are refracted by different amounts as the light passes through a lens.
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Chapter 29: Particles and Waves
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Sample Questions
Q1) The de Broglie wavelength of an electron (m = 9.11 × 10<sup>-</sup>³¹ kg)is 1.2 × 10<sup>-</sup>¹ m.Determine the kinetic energy of the electron.
A)1.5 × 10<sup>-</sup>¹ J
B)1.6 × 10<sup>-</sup>¹ J
C)1.7 × 10<sup>-</sup>¹ J
D)1.8 × 10<sup>-</sup>¹ J
E)1.9 × 10<sup>-</sup>¹ J
Q2) The position of a hydrogen atom (m = 1.7 × 10<sup>-</sup>² kg)is known to within 2.0 × 10<sup>-</sup> m.What is the minimum uncertainty in the atom's velocity?
A)zero m/s
B)0.0085 m/s
C)0.011 m/s
D)0.016 m/s
E)0.031 m/s
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