Circuits to OpticsJune 16, 2004

2

Circular Motion

3

A ball attached to A ball attached to a string is moved at a string is moved at constant speed in a constant speed in a horizontal circular horizontal circular path. A target is located near the path path. A target is located near the path of the ball as shown in the diagram. At of the ball as shown in the diagram. At which point along the ball’s path which point along the ball’s path should the string be released, if the should the string be released, if the ball is to hit the target?ball is to hit the target?

A) A B) B C) C D) DA) A B) B C) C D) D

4

An artificial satellite makes 4 An artificial satellite makes 4 complete revolutions about the complete revolutions about the Earth in 8 hours. The period of Earth in 8 hours. The period of revolution of the satellite isrevolution of the satellite is

A) ½ hour A) ½ hour B) 2 hoursB) 2 hoursC) 8 hours C) 8 hours D) 32 hoursD) 32 hours

5

Centripetal Acceleratio

n&

Force

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The diagram below shows the elliptical The diagram below shows the elliptical orbit of a comet around the Sun. orbit of a comet around the Sun.

The magnitude of the centripetal The magnitude of the centripetal acceleration of the comet is greatest at acceleration of the comet is greatest at pointpointA) A B) B C) C D) DA) A B) B C) C D) D

7

A car moves with a A car moves with a constant speed in a constant speed in a clockwise direction clockwise direction around a circular around a circular path of radius path of radius r, as r, as represented in the diagram above. represented in the diagram above. When the car is in the position shown, When the car is in the position shown, its acceleration is directed toward theits acceleration is directed toward theA) north B) west C) south D) eastA) north B) west C) south D) east

8

Thermodynamics

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What is the boiling point of water at What is the boiling point of water at standard pressure on the Kelvin scale?standard pressure on the Kelvin scale?

A. 100 K A. 100 K B. 212 K B. 212 K C. 273 K C. 273 K D. 373 KD. 373 K

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A thermometer is dipped into alcohol A thermometer is dipped into alcohol and the alcohol is allowed to and the alcohol is allowed to evaporate from the thermometer. As evaporate from the thermometer. As the alcohol evaporates, the the alcohol evaporates, the temperature reading of the temperature reading of the thermometerthermometer

A. decreases A. decreases B. increases B. increases C. remains the sameC. remains the same

Which type of field is present near a moving Which type of field is present near a moving electric charge?electric charge?

(A) an electric field, only(A) an electric field, only(B) a magnetic field, only(B) a magnetic field, only(C) both an electric field and a magnetic field(C) both an electric field and a magnetic field(D) neither an electric field nor a magnetic (D) neither an electric field nor a magnetic

fieldfield

The electric circuit consists of a 12-volt The electric circuit consists of a 12-volt battery, a 3.0-ohm resistor, R1, and a variable battery, a 3.0-ohm resistor, R1, and a variable resistor, R2. At what value must the variable resistor, R2. At what value must the variable resistor be set to produce a current of 1.0 resistor be set to produce a current of 1.0 ampere through R1?ampere through R1?

(A) 6.0 Ω (A) 6.0 Ω (B) 3.0 Ω(B) 3.0 Ω(C) 9.0 Ω (C) 9.0 Ω (D) 12 Ω(D) 12 Ω

A physics student notices that 4.0 waves arrive at the beach every 20 seconds. The frequency of these waves is

(A) 0.20 Hz(B) 16 Hz (C) 5.0 Hz(D) 80 Hz

An electric guitar is generating a sound of constant frequency. An increase in which sound wave characteristic would result in an increase in loudness?

(A) speed (B) period(C) wavelength (D) amplitude

Which diagram best represents magnetic field lines around a bar magnet?

A laser beam is A laser beam is directed at the directed at the surface of a surface of a smooth, calm smooth, calm pond. Which pond. Which organisms could organisms could be illuminated by the laser light?be illuminated by the laser light?

(A) the bird and the fish (A) the bird and the fish (B) the crab and the seaweed(B) the crab and the seaweed(C) the bird and the seaweed (C) the bird and the seaweed (D) the crab and the fish(D) the crab and the fish

A photon of which electromagnetic A photon of which electromagnetic radiation has the most energy?radiation has the most energy?

(A) ultraviolet (A) ultraviolet (C) infrared(C) infrared(B) x ray (B) x ray (D) microwave(D) microwave

What is the reading on ammeter A?What is the reading on ammeter A?(A) 1.3 A (A) 1.3 A (C) 3.0 A(C) 3.0 A(B) 1.5 A (B) 1.5 A (D) 0.75 A(D) 0.75 A

Two pulses are traveling toward each other in a Two pulses are traveling toward each other in a uniform medium. Which diagram best represents uniform medium. Which diagram best represents the medium when the pulses meet at point X?the medium when the pulses meet at point X?

(A)(A)

(B)(B)

(C)(C)

(D)(D)

A mass, M, is hung from A mass, M, is hung from a spring and reaches a spring and reaches equilibrium at position B. equilibrium at position B. The mass is then raised to The mass is then raised to position A and released. position A and released. The mass oscillates between The mass oscillates between positions A and C. positions A and C.

At which position, A, B, or C, At which position, A, B, or C, is mass M located when the is mass M located when the kinetic energy of the system kinetic energy of the system is at a maximum? is at a maximum?

A mass, M, is hung from A mass, M, is hung from a spring and reaches a spring and reaches equilibrium at position B. equilibrium at position B. The mass is then raised to The mass is then raised to position A and released. position A and released. The mass oscillates between The mass oscillates between positions A and C. positions A and C.

At which position, A, B, or C, At which position, A, B, or C, is mass M located when the is mass M located when the gravitational potential energy gravitational potential energy of the system is at a maximum? of the system is at a maximum?

A mass, M, is hung from A mass, M, is hung from a spring and reaches a spring and reaches equilibrium at position B. equilibrium at position B. The mass is then raised to The mass is then raised to position A and released. position A and released. The mass oscillates between The mass oscillates between positions A and C. positions A and C.

At which position, A, B, or C, At which position, A, B, or C, is mass M located when the is mass M located when the elastic potential energy of the elastic potential energy of the system is at a maximum?system is at a maximum?

23

A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 45.7 cm from a double convex distance of 45.7 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the image distance. Determine the image distance.

1/f = 1/do + 1/d1/f = 1/do + 1/dii

1/(15.2 cm) = 1/(45.7 cm) + 1/d1/(15.2 cm) = 1/(45.7 cm) + 1/dii

0.0658 cm0.0658 cm-1-1 = 0.0219 cm = 0.0219 cm-1 -1 + 1/d+ 1/dii

0.0439 cm0.0439 cm-1-1 = 1/d = 1/dii

22.8 cm = d22.8 cm = dii

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A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 45.7 cm from a double convex distance of 45.7 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the image size. (Determine the image size. (22.8 cm = di)22.8 cm = di)

hhii/h/hoo = - d = - dii/d/doo

hhi i /(4.00 cm) = - (22.8 cm)/(45.7 cm)/(4.00 cm) = - (22.8 cm)/(45.7 cm)

hhi i = - (4.00 cm) • (22.8 cm)/(45.7 cm)= - (4.00 cm) • (22.8 cm)/(45.7 cm)

hhii = -1.99 cm= -1.99 cm

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A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 8.30 cm from a double convex distance of 8.30 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the image distance.Determine the image distance.

1/f = 1/do + 1/d1/f = 1/do + 1/dii

1/(15.2 cm) = 1/(8.30 cm) + 1/d1/(15.2 cm) = 1/(8.30 cm) + 1/dii

0.0658 cm0.0658 cm-1-1 = 0.120 cm = 0.120 cm-1 -1 + 1/d+ 1/dii

-0.0547 cm-0.0547 cm-1-1 = 1/d = 1/dii

-18.3 cm = -18.3 cm = ddii

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A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 8.30 cm from a double convex distance of 8.30 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the Determine the image size. image size.

((ddi i = -18.3 cm)= -18.3 cm)

hhii/h/hoo = - d = - dii/d/doo

hhi i /(4.00 cm) = - (-18.3 cm)/(8.30 cm)/(4.00 cm) = - (-18.3 cm)/(8.30 cm)

hhi i = - (4.00 cm) • (-18.3 cm)/(8.30 cm)= - (4.00 cm) • (-18.3 cm)/(8.30 cm)

hhii = = 8.81 cm8.81 cm

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A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 8.30 cm from a double convex distance of 8.30 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the image distance.Determine the image distance.

1/f = 1/do + 1/d1/f = 1/do + 1/dii

1/(15.2 cm) = 1/(8.30 cm) + 1/d1/(15.2 cm) = 1/(8.30 cm) + 1/dii

0.0658 cm0.0658 cm-1-1 = 0.120 cm = 0.120 cm-1 -1 + 1/d+ 1/dii

-0.0547 cm-0.0547 cm-1-1 = 1/d = 1/dii

-18.3 cm-18.3 cm= d= dii

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A 4.00-cm tall light bulb is placed a A 4.00-cm tall light bulb is placed a distance of 8.30 cm from a double convex distance of 8.30 cm from a double convex

lens having a focal length of 15.2 cm. lens having a focal length of 15.2 cm. Determine the Determine the image size.image size.

(-18.3 cm(-18.3 cm= d= dii))

hhii/h/hoo = - d = - dii/d/doo

hhi i /(4.00 cm) = - (-18.3 cm)/(8.30 cm)/(4.00 cm) = - (-18.3 cm)/(8.30 cm)

hhi i = - (4.00 cm) • (-18.3 cm)/(8.30 cm)= - (4.00 cm) • (-18.3 cm)/(8.30 cm)

hhi i = = 8.81 cm8.81 cm