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physics
schaums outline of college physics

Questions and Answers of Schaums Outline Of College Physics

Find the speed of compression waves in a metal rod if the material of the rod has a Young’s modulus of 1.20 × 1010 N/m2 and a density of 8920 kg/m3.
An increase in pressure of 100 kPa causes a certain volume of water to decrease by 5 × 10−3 percent of its original volume. (a) What is the bulk modulus of water? (b) What is the speed of sound
The level of normal speech exchanged with a person 1.0 m away corresponds to an intensity of about 10−6 W/m2. Determine the intensity level (β) of the sound.
The threshold of human hearing is an intensity of about 10–12 W/m2. Determine the corresponding intensity level using your calculator. Make sure to distinguish between the keys for ln and log even
A machine produces a sound level of 80 dB at the location of a detector. What would be the new sound level at the detector if an identical machine at the same distance was now turned on adding to the
Suppose the intensity of sound increases by a multiplicative factor of 10.0, going from say 1.0 W/m2 to 10 W/m2 to 100 W/m2 and so on. By how much is the intensity level increased each time?
If the intensity level of sound is to be decreased from 130 dB to 110 dB and if the initial intensity is Ii, what will be the final intensity If?
If the intensity of sound changes, the sound level will change. Suppose then that the sound level goes from βi to βf such that βf − βi = Δβ. Show that AB=10 log10 (f/I;) (23.9)
Suppose we add ±3.0 dB to the intensity level of sound in a room. What happens to the intensity as measured in W/m2?
Redo Problem 23.45 using Eq. (23.9).Problem 23.45If the intensity level of sound is to be decreased from 130 dB to 110 dB and if the initial intensity is Ii, what will be the final intensity If?
A sound has an intensity of 5.0 × 10−7 W/m2. What is its intensity level?
A person riding a power mower may be subjected to a sound of intensity 2.00 × 10−2 W/m2. What is the intensity level to which the person is subjected?
A rock band might easily produce a sound level of 107 dB in a room. To two significant figures, what is the sound intensity at 107 dB?
A whisper has an intensity level of about 15 dB. What is the corresponding intensity of the sound?
What sound intensity is 3.0 dB louder than a sound of intensity of 10 μW/cm2?
Calculate the intensity of a sound wave in air at precisely 0 °C and 1.00 atm if its amplitude is 0.002 0 mm and its wavelength is 66.2 cm. The density of air at S.T.P. is 1.293 kg/m3.
What is the amplitude of vibration in a 8000 Hz sound beam if its intensity level is 62 dB? Assume that the air is at 15 °C and its density is 1.29 kg/m3.
One sound has an intensity level of 75.0 dB, while a second has an intensity level of 72.0 dB. What is the intensity level when the two sounds are combined?
The two sources shown in Fig. 23-4 emit identical beams of sound (λ = 80 cm) toward one another. Each sends out a crest at the same time as the other (the sources are in-phase). Point P is a
The flux through the solenoid of Problem 32.17 is reduced to a value of 1.0 mWb in a time of 0.050 s. Find the induced emf in the solenoid.Problem 32.17Figure 32-9(a) depicts a two-turn horizontal
An organ pipe is tuned to emit a frequency of 196.00 Hz. When it and the G string of a violin are sounded together, ten beats are heard in a time of exactly 8 s. The beats become slower as the violin
How much work is required to carry an electron from the positive terminal of a 12-V battery to the negative terminal?
A 2000-loop solenoid is wound uniformly on a long rod with length d and cross-section A. The relative permeability of the iron is km.On top of this is wound a 50-loop coil which is used as a
A certain series circuit consists of a 12-V battery, a switch, a 1.0- MΩ resistor, and a 2.0-μF capacitor, initially uncharged. If the switch is now closed, find (a) The initial current in the
A 5.0-μF capacitor is charged to a potential difference of 20 kV across its plates. After being disconnected from the power source, it is connected across a 7.0-MΩ resistor to discharge. What is
A coil has an inductance of 1.5 H and a resistance of 0.60 Ω. If the coil is suddenly connected across a 12-V battery, find the time required for the current to rise to 0.63 of its final value. What
A step-up transformer is used on a 120-V line to furnish 1800 V. The primary has 100 turns. How many turns are on the secondary?
A transformer used on a 120-V line delivers 2.0 A at 900 V. What current is drawn from the line? Assume 100 percent efficiency.
A step-down transformer operates on a 2.5-kV line and supplies a load with 80 A. The ratio of the primary winding to the secondary winding is 20 : 1. Assuming 100 percent efficiency, determine the
An ammeter in a 60.0-Hz circuit reads 2.50 A. Determine the maximum current in the circuit.
Suppose the electrical power in an ac system has an effective voltage of 110 V. Determine the maximum voltage across the output terminals.
The ac current in a 60.0-Hz circuit has an effective value of 2.50 A. It passes through a 25.0-Ω resistor. Determine the maximum voltage across the resistor.
A coil possessing an inductance of 0.400 H is in a 60.0-Hz circuit. Determine its inductive reactance.
A 420-mF capacitor is in a 60.0-Hz circuit. Determine its capacitive reactance.
A coil possessing an inductance of 0.400 H and a resistance of 2.00 Ω is placed across a 6.00-V battery. Determine the sustained current in the circuit.
A voltmeter reads 80.0 V when it is connected across the terminals of a sinusoidal power source with ƒ = 1000 Hz. Write the equation for the instantaneous voltage provided by the source.
An ac current in a 10 Ω resistance produces thermal energy at the rate of 360 W. Determine the effective values of the current and voltage.
A 40.0-Ω resistor is connected across a 15.0-V variable-frequency electronic oscillator. Find the current through the resistor when the frequency is (a) 100 Hz and (b) 100 kHz.
Solve Problem 35.22 if the 40.0-Ω resistor is replaced by a 2.00- mH inductor.Problem 35.22A 40.0-Ω resistor is connected across a 15.0-V variable-frequency electronic oscillator. Find the current
Solve Problem 35.22 if the 40.0-Ω resistor is replaced by 0.300-μF capacitor.Problem 35.22A 40.0-Ω resistor is connected across a 15.0-V variable-frequency electronic oscillator. Find the current
A coil has resistance 20 Ω and inductance 0.35 H. Compute its reactance and its impedance to an alternating current of 25 cycles/s.
A current of 30 mA is supplied to a 4.0-μF capacitor connected across an alternating current line having a frequency of 500 Hz. Compute the reactance of the capacitor and the voltage across the
A coil has an inductance of 0.100 H and a resistance of 12.0 Ω. It is connected to a 110-V, 60.0-Hz line. Determine (a) The reactance of the coil, (b) The impedance of the coil, (c) The current
A 10.0-μF capacitor is in series with a 40.0-Ω resistance, and the combination is connected to a 110-V, 60.0-Hz line. Calculate (a) The capacitive reactance, (b) The impedance of the
A circuit having a resistance, an inductance, and a capacitance in series is connected to a 110-V ac line. For the circuit, R = 9.0 Ω, XL = 28 Ω, and XC = 16 Ω. Compute (a) The impedance of the
An experimenter has a coil of inductance 3.0 mH and wishes to construct a circuit whose resonant frequency is 1.0 MHz. What should be the value of the capacitor used?
A circuit has a resistance of 11 Ω, a coil of inductive reactance 120 Ω, and a capacitor with a 120-Ω reactance, all connected in series with a 110-V, 60-Hz power source. What is the potential
A 120-V, 60-Hz power source is connected across an 800-Ω noninductive resistance and an unknown capacitance in series. The voltage drop across the resistor is 102 V. (a) What is the voltage drop
A coil of negligible resistance is connected in series with a 90-Ω resistor across a 120-V, 60-Hz line. A voltmeter reads 36 V across the resistance. Find the voltage across the coil and the
The primary of an ideal transformer having negligible losses has 200 times the number of turns as the secondary. If the input power is 200 W ac, what is the output power?
The primary of an ideal transformer having negligible losses has 200 times the number of turns as the secondary. If the input power is 200 W dc, what is the output power? The load is purely resistive.
The secondary of a transformer having negligible losses has 300 times the number of turns as the primary. If the input voltage is 110 V ac, what is the output voltage?
The secondary of a transformer having negligible losses has 300 times the number of turns as the primary. If the output current is 50.0 mA ac, what is the input current?
A step-down transformer is used on a 2.2-kV line to deliver 110 V. How many turns are on the primary winding if the secondary has 25 turns?
A step-down transformer is used on a 1650-V line to deliver 45 A at 110 V. What current is drawn from the line? Assume 100 percent efficiency.
Two plane mirrors make an angle of 30° with each other. Locate graphically four images of a luminous point A placed between the two mirrors. (See Fig. 36-6.) B" Pi 30° XL A NM B' Fig. 36-6 Y X
A step-up transformer operates on a 110-V line and supplies a load with 2.0 A. The ratio of the primary and secondary windings is 1 : 25. Determine the secondary voltage, the primary current, and the
As shown in Fig. 36-8, a light ray IO is incident on a small plane mirror. The mirror reflects this ray back onto a straight ruler SC which is 1 m away from and parallel to the undeflected mirror MM.
A boy is 1.50 m tall and can just see his image in a vertical plane mirror 3.0 m away. His eyes are 1.40 m from the floor level. Determine the vertical dimension and elevation of the shortest mirror
The concave spherical mirror shown in Fig. 36-9 has radius of curvature 4 m. An object OO', 5 cm high, is placed 3 m in front of the mirror. By (a) Construction and (b) Computation, determine the
An object OO' is 25 cm from a concave spherical mirror of radius 80 cm (Fig. 36-10). Determine the position and relative size of its image II' (a) By construction and (b) By use of the mirror
As shown in Fig. 36-11, an object 6 cm high is located 30 cm in front of a convex spherical mirror of radius 40 cm. Determine the position and height of its image, (a) By construction and (b) By
Where should an object be placed, with reference to a concave spherical mirror of radius 180 cm, to form a real image that is half the size of the object?
How far must a girl stand in front of a concave spherical mirror of radius 120 cm to see an erect image of her face four times its natural size?
What kind of spherical mirror must be used, and what must be its radius, in order to give an erect image one-fifth as large as an object placed 15 cm in front of it?
The diameter of the Sun subtends an angle of approximately 32 minutes (32') at any point on the Earth. Determine the position and diameter of the solar image formed by a concave spherical mirror
A dental technician uses a small mirror that gives a magnification of 4.0 when it is held 0.60 cm from a tooth. What is the radius of curvature of the mirror?
A lit candle is a perpendicular distance of 20.0 cm from the front of a flat mirror. (a) Where will its image appear? (b) What kind of image will it be?
A bug 1.0 cm tall is a perpendicular distance of 15.0 cm from the front of a flat mirror. (a) Where will its image appear? (b) How tall will the image be? (c) Can the image be projected onto a
A converging thin lens (f = 20 cm) is placed 37 cm in front of a screen. Where should the object be placed if its image is to appear on the screen?
Compute the position and focal length of the converging thin lens, which will project the image of a lamp, magnified 4 times, upon a screen 10.0 m from the lamp.
In what two positions will a converging thin lens of focal length +9.00 cm form images of a luminous object on a screen located 40.0 cm from the object?
A converging thin lens with 50-cm focal length forms a real image that is 2.5 times larger than the object. How far is the object from the image?
A thin lens of focal length f projects upon a screen the image of a luminous object magnified N times. Show that the lens distance from the screen is (N + 1)f.
A thin lens has a convex surface of radius 20 cm and a concave surface of radius 40 cm and is made of glass of refractive index 1.54. Compute the focal length of the lens, and state whether it is a
A thin double convex lens has faces of radii 18 and 20 cm. When an object is 24 cm from the lens, a real image is formed 32 cm from the lens. Determine (a) The focal length of the lens and (b) The
A thin glass lens (n = 1.50) has a focal length of +10 cm in air. Compute its focal length in water (n = 1.33).
A double convex thin lens has radii of 20.0 cm. The index of refraction of the glass is 1.50. Compute the focal length of this lens (a) In air and (b) When it is immersed in carbon disulfide (n =
Two thin lenses, of focal lengths +9.0 and -6.0 cm, are placed in contact. Calculate the focal length of the combination.
An achromatic lens is formed from two thin lenses in contact, having powers of +10.0 diopters and -6.0 diopters. Determine the power and focal length of the combination.
Draw diagrams to indicate qualitatively the position, nature, and size of the image formed by a converging lens of focal length f for the following object distances: (a) Infinity, (b) Greater than
A thin lens has a focal length of +20.0 cm. An object is placed 300 m in front of the lens. Roughly where will the image be formed? Explain your answer.
An object is very far from the front of a thin converging lens. As the object approaches the lens, still farther than one focal length from it, what happens to the size of the image?
You are designing a copy machine using a positive lens with a 15.0-cm focal length. Where should the input page be located with respect to the lens in order to produce exact copies? Explain your
Show that for a thin positive lens f = S₂ S₁/(S₂ + S;) So Si
Where must an object be located with respect to a thin positive lens of focal length 300 cm if its image is to be real and magnified?
A bug on the central axis is 300 cm from a thin positive lens of focal length 60.0 cm. Where will its image be formed? Describe that image. [Thin Lens Equation] =+=-=-=- So Si (38.1)
Considering the bug in the previous problem, what was the magnification of the image? Does your answer agree with the answers to the previous problem?Previous problemA bug on the central axis is 300
Where should an object be placed in front of a thin converging lens of focal length 100 cm if the image is to be 200 cm behind the lens? Explain your answer. Describe the image.
Where should an object be placed in front of a thin converging lens of focal length 100 cm if the image is to be 400 cm behind the lens? Discuss your answer. Describe the image.
A 1.0-cm-tall object is placed in front of a thin converging lens of focal length 200 cm. The resulting image is right-side-up and 2.0 cm tall. Roughly locate and then describe the image. Determine
A 1.0-cm-tall object is placed in front of a thin converging lens of focal length 200 cm. The image is right-side-up and 2.0 cm tall. Write an expression for the image distance in terms of the object
Where should a 1.0-cm-tall object be placed in front of a thin converging lens of focal length 200 cm if the image is to be rightside- up and 2.0 cm tall? Discuss your answer. Describe the image.
What is the separation between the object and its image formed by a positive lens when the image is real and twice the size of the object? Give your answer in terms of 25.0 cm.
An object on the central axis is 200 cm from the vertex of a thin negative lens having a focal length of 25.0 cm. Locate and describe the image.
We have a thin negative lens with a focal length of −1.40 m. An object is placed on the central axis 200 cm from the lens. If the object is 2.00 cm tall, how tall is the image? Locate and describe
Determine the nature, position, and transverse magnification of the image formed by a thin converging lens of focal length +100 cm when the object distance from the lens is (a) 150 cm, (b) 75.0 cm.
Determine the two locations of an object such that its image will be enlarged 8.0 times by a thin lens of focal length +4.0 cm.
What are the nature and focal length of the thin lens that will form a real image having one-third the dimensions of an object located 9.0 cm from the lens?
Describe fully the image of an object that is 10 cm high and 28 cm from a diverging lens of focal length -7.0 cm.

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