Waves & Sound

Standing Waves

Shown below are standing waves on a rope. Rank the waves from highest to lowest based on frequency.

1__ 2__ 3__ 4__ Answer. Answer : D A C B The frequency of a wave is the number of vibrations per unit of time. (TOC)

Sound Waves

Shown below are tuning forks vibrating at different frequencies. Rank the tuning forks from highest to lowest based on the wavelength of the sound wave they produce.

1__ 2__ 3__ 4__ Answer. Answer : D B A C The wavelength of a wave is inversely related to the frequency. (TOC)

Speed of Sound

Shown below are jet airplanes emitting sound waves with identical frequencies. The airplanes are moving at different speeds. Rank the airplanes from highest to lowest based on the speed of the airplane.

1__ 2__ 3__ 4__ Answer. Answer : C A D B As an object approaches the speed of sound, the distance between wave-fronts in front of the object decreases. (TOC)

Light

Shown below is a ray of white light passing through a glass prism and separating into a color spectrum. Rank the colors in the color spectrum from highest to lowest based on their frequency.

1__ 2__ 3__ 4__ 5__ 6__ Answer. Answer : F E D C B A For light traveling from air to glass, the more bending, the higher the frequency. (TOC)

Shown below are rays of light traveling from air through materials with varying indexes of refraction. Rank the materials from highest to lowest based on their index of refraction.

1__ 2__ 3__ 4__ Answer. Answer : B C A D The more bending, the higher the index of refraction. (TOC)

Shown below is a situation where a coin is placed in the bottom of a foam cup. Situation A is before, and situation B is after water is poured into the cup. In which situation is the coin more visible to the observer?

A or B? Answer. Answer : B The light rays from the water will refract toward the observer. (TOC)

Electricity & Magnetism

Shown below are circuits with varying numbers of identical light bulbs and identical voltage sources. Assume the wires have no resistance, and rank the circuits from highest to lowest based on the brightness of bulb number 1.

1__ 2__ 3__ Answer. Answer : B A C I = V/R (TOC)

Shown below are circuits with identical resistors and varying voltage sources. In each circuit a voltmeter has been placed across one of the resistors. Rank the circuits from highest to lowest based on the measured voltage.

1__ 2__ 3__ 4__ Answer. Answer : B C A D The voltage source is equal to the sum of the voltage drops for a series circuit. (TOC)

Shown below are circuits with identical resistors and varying voltage sources. In each circuit am ammeter has been inserted in the circuit. Rank the circuits from highest to lowest based on the measured current.

1__ 2__ 3__ 4__ Answer. Answer : D A C B I = V/R (TOC)

Shown below are circuits with identical resistors and varying voltage sources. In each circuit am ammeter has been inserted in the circuit. Rank the circuits from highest to lowest based on the measured current.

1__ 2__ 3__ 4__ Answer. Answer : D A C B I = V/R (TOC)

Shown below are electromagnets with equal current flow. Each pair are seperated the same distance. Rank the circuits from highest to lowest based on the force of attraction of the pair of electromagnetsbrightness of bulb number 1.

1__ 2__ 3__ 4__ Answer. Answer : C B D A right-hand-rule F = BIL (TOC)

Shown below are ions entering a mass spectrometer with the same speed and different circular paths. Each ion has the same charge. Rank the ions from highest to lowest based on their mass.

1__ 2__ 3__ 4__ Answer. Answer : D C B A m = qBr/v (TOC)