| 26. Which type of oscillation would most likely produce an electromagnetic wave? | |||||
| 27. If monochromatic light passes from water into air with an angle of incidence of 35°, which characteristic of the light will remain the same? | |||||
| 28. The absolute index of refraction of medium Y is twice as great as the absolute index of refraction of medium X. As a light ray travels from medium X into medium Y, the speed of the light ray is | |||||
| 29.The diagram below shows a transverse wave moving toward the right along a rope.
| |||||
| 30.When an isolated conductor is placed in the vicinity of a positive charge, the conductor is attracted to the charge. The charge of the conductor | |||||
| 31.The quarks that compose a baryon may have charges of | |||||
| 32. A rubber block weighing 60. newtons is resting on a horizontal surface of dry asphalt. What is the magnitude of the minimum force needed to start the rubber block moving across the dry asphalt? | |||||
33. The data table below lists the mass and speed of four different objects.
Which object has the greatest inertia? | |||||
34. The electroscope shown in the diagram below is made completely of metal and consists of a knob, a stem, and leaves. A positively charged rod is brought near the knob of the electroscope and then removed. The motion of the leaves results from electrons moving from the | |||||
| 35. Which circuit diagram represents the correct way to measure the current in a resistor? | |||||
| 36. The height of a typical kitchen table is approximately | |||||
| 37. A ball is thrown with a velocity of 35 meters per second at an angle of 30.° above the horizontal. Which quantity has a magnitude of zero when the ball is at the highest point in its trajectory? | |||||
38. The graph below represents the relationship between velocity and time of travel for a toy car moving in a straight line.
The shaded area under the line represents the toy car’s | |||||
| 39. A spring stores 10. joules of elastic potential energy when it is compressed 0.20 meter. What is the spring constant of the spring? | |||||
| 41. What is the magnitude of the average net force acting on the cannon? | |||||
| 42. A metal sphere, X, has an initial net charge of -6 x 10-6 coulomb and an identical sphere, Y, has an initial net charge of +2 x 10-6 coulomb. The spheres touch each other and then separate. What is the net charge on sphere X after the spheres have separated? | |||||
| 43. A constant eastward horizontal force of 70. newtons is applied to a 20.-kilogram crate moving toward the east on a level floor. If the frictional force on the crate has a magnitude of 10. newtons, what is the magnitude of the crate’s acceleration? | |||||
| 44. Which graph represents the relationship between the energy of photons and the wavelengths of photons in a vacuum? | |||||
| 46. What is the total number of antinodes on the standing wave in the diagram? | |||||
| 47. The diagrams below represent four pieces of copper wire at 20.°C. For each piece of wire, ℓ represents a unit of length and A represents a unit of cross-sectional area.
The piece of wire that has the greatest resistance is | |||||
| 49. What is the magnitude of the electric force between the two spheres? | |||||
| 50. The diagram below represents the wave fronts produced by a point source moving to the right in a uniform medium. Observers are located at points A and B.
Compared to the wave frequency and wavelength observed at point A, the wave observed at point B has a | |||||
