PhysicsLAB AAPT Quiz
1996 Physics Quiz Bowl (Part 2)

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21. Two isolated conducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

22. When an ideal gas is isothermally compressed:

23. A hypothetical planet has seven times the mass of Earth and twice the radius of Earth. The magnitude of the gravitational acceleration at the surface of this planet is most nearly:
24. A 2.0-kg ball is attached to a 0.80 m string and whirled in a horizontal circle at a constant speed of 6.0 m/s.
The work done on the ball during each revolution is:
25. Which of the following is NOT possible for the images formed by the lens in the accompanying figure?

26. If the speed of sound in air is 340 m/s, the length of the organ pipe, open at both ends, that can resonate at the fundamental frequency of 136 Hz, would be:
27. A long straight wire conductor is placed below a compass. When the conventional current in the conductor is from south to north and large, the N pole of the compass:

28. A photon with frequency f behaves as if it had a mass equal to:
29. Two large parallel plates a distance d apart are charged by connecting them to a battery of potential difference V. The battery is disconnected, and the plates are slowly moved apart. As the distance between plates increases:

30. An 800-kg elevator accelerates downward at 2.0 m/s2. The force exerted by the cable on the elevator is:
31. See the accompanying figure.
What is the current through the 300-ohm resistor when the capacitor is fully charged?
32. The 10.0 kg box shown in the figure below is sliding to the right along the floor. A horizontal force of 10.0 N is being applied to the right. The coefficient of kinetic friction between the box and the floor is 0.20.
The box is moving with:

33. Two blocks X and Y are in contact on a horizontal frictionless surface. A 36 N constant force is applied to X as shown below.
The force exerted by X on Y is:
34. A point charge +q is placed midway between two point charges +3q and -q separated by a distance 2d. If Coulomb’s constant is k, the magnitude of the force on the charge +q is:
35. A projectile of mass m is fired horizontally from a spring gun that rests on a horizontal frictionless surface. The mass of the gun is M .
If the kinetic energy of the projectile after firing is Ek, the gun will recoil with a kinetic energy equal to:
36. An isolated conducting sphere of radius R has positive charge +Q. Which graph best depicts the electric field as a function of r, the distance from the center of the sphere?
37. Four identical light bulbs K, L, M, and N are connected in the electrical circuit shown in the accompanying figure. Bulb M burns out.
Which of the following statements is true?

38. A pendulum bob mass m on a cord length L is pulled sideways until the cord makes an angle θ with the vertical as shown in the figure below.
The change in potential energy of the bob during the displacement is:

39. Assume the objects in the following diagrams have equal mass and the strings holding them in place are identical. In which case would the string be most likely to break?
40. A proton of mass M and kinetic energy Ek passes undeflected through a region with electric and magnetic fields perpendicular to each other. The electric field has magnitude E. The magnitude of the magnetic field B is:

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