| NY Regents January 2008, Part 2 Printer Friendly Version |
| 21. An electric circuit contains a variable resistor connected to a source of constant potential difference. Which graph best represents the relationship between current and resistance in this circuit? | |||||
22 In the circuit diagram below, two 4.0-ohm resistors are connected to a 16-volt battery as shown.
The rate at which electrical energy is expended in this circuit is | |||||
| 23. Increasing the amplitude of a sound wave produces a sound with | |||||
| 24. The product of a wave’s frequency and its period is | |||||
| 25. A periodic wave having a frequency of 5.0 hertz and a speed of 10. meters per second has a wavelength of | |||||
| 26. An electromagnetic wave traveling through a vacuum has a wavelength of 1.5 × 10–1 meter. What is the period of this electromagnetic wave? | |||||
| 27. A ray of light (f = 5.09 × 1014 Hz) traveling in air strikes a block of sodium chloride at an angle of incidence of 30.°. What is the angle of refraction for the light ray in the sodium chloride? | |||||
| 28 The speed of a ray of light traveling through a substance having an absolute index of refraction of 1.1 is | |||||
| 29. Resonance occurs when one vibrating object transfers energy to a second object causing it to vibrate. The energy transfer is most efficient when, compared to the first object, the second object has the same natural | |||||
| 30. A subatomic particle could have a charge of | |||||
31. Two pulses traveling in the same uniform medium approach each other, as shown in the diagram below.
Which diagram best represents the superposition of the two pulses? | |||||
| 32. A police car traveling at a speed of 30.0 meters per second sounds its siren, which has a frequency of 1.00 × 103 hertz. As the police car approaches a stationary pedestrian, the pedestrian detects a siren frequency of | |||||
| 33. A variable-frequency light source emits a series of photons. As the frequency of the photon increases, what happens to the energy and wavelength of the photon? | |||||
| 34. Which diagram best represents the shape and direction of a series of wave fronts after they have passed through a small opening in a barrier? | |||||
35. The diagram below represents the sequence of events (steps 1 through 10) resulting in the production of a D– meson and a D+ meson. An electron and a positron (antielectron) collide (step 1), annihilate each other (step 2), and become energy (step 3). This energy produces an anticharm quark and a charm quark (step 4), which then split apart (steps 5 through 7). As they split, a down quark and an antidown quark are formed, leading to the final production of a D– meson and a D+ meson (steps 8 through 10).
Which statement best describes the changes that occur in this sequence of events? | |||||
| 36. A joule is equivalent to a | |||||
| 37. The weight of a chicken egg is most nearly equal to | |||||
| 38. Two forces act concurrently on an object. Their resultant force has the largest magnitude when the angle between the forces is | |||||
| 39. A bicycle and its rider have a combined mass of 80. kilograms and a speed of 6.0 meters per second. What is the magnitude of the average force needed to bring the bicycle and its rider to a stop in 4.0 seconds? | |||||
| 40. Gravitational forces differ from electrostatic forces in that gravitational forces are | |||||
