2nd Semester Review

Which of the following is the time it takes to complete a cycle of motion? a. amplitude b. period c. frequency d. revolution

Which of the following is the time it takes to complete a cycle of motion? a. amplitude b. period c. frequency d. revolution

A musical tone sounded on a piano has a frequency of 410 Hz and a wavelength of 0.80 m. What is the speed of the sound wave? a. 170 m/s c. 330 m/s b. 240 m/s d. 590 m/s

A musical tone sounded on a piano has a frequency of 410 Hz and a wavelength of 0.80 m. What is the speed of the sound wave? a. 170 m/s c. 330 m/s b. 240 m/s d. 590 m/s

A student sends a pulse traveling on a taut rope with one end attached to a post. What will the student observe? a. The pulse will not be reflected if the rope is free to slide up and down on the post. b. The pulse will be reflected and inverted if the rope is free to slide up and down on the post. c. The pulse will be reflected and inverted if the rope is fixed to the post. d. The pulse will not be inverted if the rope is fixed to the post.

A student sends a pulse traveling on a taut rope with one end attached to a post. What will the student observe? a. The pulse will not be reflected if the rope is free to slide up and down on the post. b. The pulse will be reflected and inverted if the rope is free to slide up and down on the post. c. The pulse will be reflected and inverted if the rope is fixed to the post. d. The pulse will not be inverted if the rope is fixed to the post.

How high or low we perceive a sound to be, depending on the frequency of the sound wave, is defined as the a. infrasonic wave. b. frequency. c. ultrasonic wave. d. pitch.

How high or low we perceive a sound to be, depending on the frequency of the sound wave, is defined as the a. infrasonic wave. b. frequency. c. ultrasonic wave. d. pitch.

The Doppler effect occurs with a. only sound waves. b The Doppler effect occurs with a. only sound waves. b. only compressional waves c. only water waves. b. only compressional waves. d. all waves.

The Doppler effect occurs with a. only sound waves. b The Doppler effect occurs with a. only sound waves. b. only compressional waves c. only water waves. b. only compressional waves. d. all waves.

What phenomenon is created by two tuning forks side by side that emit frequencies that differ by only a small amount? a. resonance b. interference c. the Doppler effect d. beats

What phenomenon is created by two tuning forks side by side that emit frequencies that differ by only a small amount? a. resonance b. interference c. the Doppler effect d. beats

If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because a. all wavelengths travel at the same speed. b. the speed of light varies for each form. c. wavelength and frequency are equal. d. the speed of light increases as wavelength increases.

If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because a. all wavelengths travel at the same speed. b. the speed of light varies for each form. c. wavelength and frequency are equal. d. the speed of light increases as wavelength increases.

If you are reading a book and you move twice as far away from the light source, how does the brightness at the new distance compare with that at the old distance? It is a. one-eighth b. one-fourth c. one-half d. twice

If you are reading a book and you move twice as far away from the light source, how does the brightness at the new distance compare with that at the old distance? It is a. one-eighth b. one-fourth c. one-half d. twice

Refraction is the term for the bending of a wave disturbance as it passes at an angle from one ____ into another. a. glass c. area b. medium d. boundary

Refraction is the term for the bending of a wave disturbance as it passes at an angle from one ____ into another. a. glass c. area b. medium d. boundary

When a light ray passes from water (n = 1. 333) into diamond (n = 2 When a light ray passes from water (n = 1.333) into diamond (n = 2.419) at an angle of 45°, its path is a. bent toward the normal. b. bent away from the normal. c. parallel to the normal. d. not bent.

When a light ray passes from water (n = 1. 333) into diamond (n = 2 When a light ray passes from water (n = 1.333) into diamond (n = 2.419) at an angle of 45°, its path is a. bent toward the normal. b. bent away from the normal. c. parallel to the normal. d. not bent.

A beam of light in air is incident at an angle of 35° to the surface of a rectangular block of clear plastic (n = 1.49). What is the angle of refraction? a. 42° b. 55° c. 23° d. 59°

A beam of light in air is incident at an angle of 35° to the surface of a rectangular block of clear plastic (n = 1.49). What is the angle of refraction? a. 42° b. 55° c. 23° d. 59°

Interference effects observed in the early 1800s were instrumental in supporting a concept of the existence of which property of light? a. polarization b. particle nature c. wave nature d. electromagnetic character

Interference effects observed in the early 1800s were instrumental in supporting a concept of the existence of which property of light? a. polarization b. particle nature c. wave nature d. electromagnetic character

A repelling force occurs between two charged objects when a A repelling force occurs between two charged objects when a. charges are of unlike signs. b. charges are of like signs. c. charges are of equal magnitude. d. charges are of unequal magnitude.

A repelling force occurs between two charged objects when a A repelling force occurs between two charged objects when a. charges are of unlike signs. b. charges are of like signs. c. charges are of equal magnitude. d. charges are of unequal magnitude.

Which sentence best characterizes electric conductors. a Which sentence best characterizes electric conductors? a. They have low mass density. b. They have high tensile strength c. They have electric charges that move freely. d. They are poor heat conductors.

Which sentence best characterizes electric conductors. a Which sentence best characterizes electric conductors? a. They have low mass density. b. They have high tensile strength c. They have electric charges that move freely. d. They are poor heat conductors.

A wire carries a steady current of 0. 1 A over a period of 20 s A wire carries a steady current of 0.1 A over a period of 20 s. What total charge moves through the wire in this time interval? a. 200 C b. 20 C c. 2 C d. 0.005 C

A wire carries a steady current of 0. 1 A over a period of 20 s A wire carries a steady current of 0.1 A over a period of 20 s. What total charge moves through the wire in this time interval? a. 200 C b. 20 C c. 2 C d. 0.005 C

In alternating current, the motion of the charges a In alternating current, the motion of the charges a. continuously changes in the forward and reverse directions. b. is equal to the speed of light. c. is greater than the speed of light. d. in the direction of the electric field.

In alternating current, the motion of the charges a In alternating current, the motion of the charges a. continuously changes in the forward and reverse directions. b. is equal to the speed of light. c. is greater than the speed of light. d. in the direction of the electric field.

A light bulb has a resistance of 240  when operating at 120 V A light bulb has a resistance of 240  when operating at 120 V. What is the current in the light bulb? a. 2.0 A c. 0.50 A b. 1.0 A d. 0.20 A

A light bulb has a resistance of 240  when operating at 120 V A light bulb has a resistance of 240  when operating at 120 V. What is the current in the light bulb? a. 2.0 A c. 0.50 A b. 1.0 A d. 0.20 A

An electric toaster requires 1100 W at 110 V An electric toaster requires 1100 W at 110 V. What is the resistance of the heating coil? a. 7.5  c. 1.0 x 101  b. 9.0  d. 11 

An electric toaster requires 1100 W at 110 V An electric toaster requires 1100 W at 110 V. What is the resistance of the heating coil? a. 7.5  c. 1.0 x 101  b. 9.0  d. 11 

If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire player? a. 3.0 V c. 6.0 V b. 4.0 V d. 12 V

If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire player? a. 3.0 V c. 6.0 V b. 4.0 V d. 12 V

Three resistors with values of 3. 0 , 6 Three resistors with values of 3.0 , 6.0 , and 12  are connected in series. What is the equivalent resistance of this combination? a. 0.58  c. 7.0  b. 1.7  d. 21 

Three resistors with values of 3. 0 , 6 Three resistors with values of 3.0 , 6.0 , and 12  are connected in series. What is the equivalent resistance of this combination? a. 0.58  c. 7.0  b. 1.7  d. 21 

Three resistors connected in parallel carry currents labeled I1, I2, and I3. Which of the following expresses the total current It in the combined system? a. It = I1 + I2 + I3 b. It = (1/ I1 + 1/ I2 + 1/ I3) c. It = I1 = I2 = I3 d. It = (1/I1 + 1/ I2 + 1/ I3)–1

Three resistors connected in parallel carry currents labeled I1, I2, and I3. Which of the following expresses the total current It in the combined system? a. It = I1 + I2 + I3 b. It = (1/ I1 + 1/ I2 + 1/ I3) c. It = I1 = I2 = I3 d. It = (1/I1 + 1/ I2 + 1/ I3)–1

37. How is the relationship between period and frequency represented as an equation?

T = 1/f or f = 1/T

38. Which carries a sound wave more rapidly, a solid or a gas? Explain.

Solid, because it is denser.

43. What is the electric force between an electron and a proton that are separated by a distance of 1.0 x 10–10 m? (e = 1.60 x 10–19 C, kc = 8.99 x 109 N·m2/C2)

F = k q1 q2 / d2 F = (9 x 109)(1. 6 x 10-19)(-1. 6 x 10-19)/(1 F = k q1 q2 / d2 F = (9 x 109)(1.6 x 10-19)(-1.6 x 10-19)/(1.0 x 10–10 )2 F = -2.3 x 10-8 N The charges are opposite so the force is attractive.

44. A hair dryer is connected across a 120 V outlet 44. A hair dryer is connected across a 120 V outlet. If the resistance of the hair dryer is 144 W, how much power is dissipated in the form of electromagnetic radiation and heat?

V = IR 120 = I x 144 I = 0.8333 A P = IV P = 0.8333 x 120 P = 100 W

45. Three resistors with values of 16 W, 19 W, 25 W, respectively, are connected in parallel. What is their equivalent resistance?

1/RT = 1/R1 + 1/R2 + 1/R3 1/RT = 1/16 + 1/19 + 1/25 1/RT = 0. 0625 + 0 1/RT = 1/R1 + 1/R2 + 1/R3 1/RT = 1/16 + 1/19 + 1/25 1/RT = 0.0625 + 0.053 + 0.04 1/RT = 0.15513 RT = 6.45 Ω