 AAPT Quiz PhysicsBowl 2011 (Part 1)
All Division 01 students, START HERE.
All Division 02 students – skip the first 10 questions and begin on # 11.
*** Treat g = 10 m/s2 for ALL questions #1 – #50.

1. Which one of the following choices best represents the average mass of an adult human male?
2. Albert Einstein’s most famous equation is E = mc2. The unit for the quantity represented by E can be written as which one of the following options?
3. The distance of one thousand meters can be written as one kilometer. Which one of the following choices best represents a distance of one million meters?
4. The following two measurements of length are recorded from an experiment:

L1 = 4.57 x 103 m and L2 = 2.130 x 102 m.

Using the rules of significant digits, what is the sum of (L1 and L2) using these measurements? 5. A positively charged rod is brought near a metal electroscope that is initially uncharged. As shown in the figure, the rod does not touch the electroscope. There is no charge transfer between the electroscope and rod, but the leaves of the electroscope move apart from each other when the rod is brought near the top of the electroscope. Which one of the following choices is the best explanation for this phenomenon?

The next two questions share the same information Base your answers to questions 6 and 7 on the information and diagram below.

 A ball of mass = 0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance.
6. When the ball reaches its maximum height, which one of the following choices best represents the magnitude of the net force acting on the ball?
7. Approximately how much time does it take the ball to reach the maximum height from its launch?

8. An object moves along a horizontal line with increasing speed. Which one of the following choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion? 9. Which one of the following choices best represents the speed of 60.0 miles/hr rewritten in units of km/day? 10. A string of negligible mass connects an object of mass M = 10 kg to the ceiling of an elevator. The elevator experiences a constant downward speed of 3.0 m/s. Let T represent the magnitude of the force on the mass M by the string (tension), G represent the magnitude of the gravitational force by the Earth acting on the mass M hanging in the elevator, and F represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the relationships between these forces?
All Division 01 students, continue to question #40.
All Division 02 students, START HERE. Numbers 1 – 10 on your answer sheet should be blank. Your first answer should be for #11.
*** Treat g = 10 m/s2 for ALL questions #1 – #50.

11. The largest particle accelerator in the world is called the LHC. What does LHC stand for?
12. A 5.0 kg mass moves along the x-axis. At one instant of time, the mass has position 2.0 m, velocity 3.0 m/s, and acceleration 4.0 m/s2. What is the net force acting on the mass at this instant of time? 13. A physics book sits at rest on a table. On top of the book is a calculator, also at rest. Which one of the following choices is the Newton’s Third Law pair force to the force that the table exerts on the book?

14. A car makes a trip in two parts:

• Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
• Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.

What is the average speed of the car for the entire two-part trip? 15. A 4.0 kg object is pushed to the right on a rough surface by a horizontal force of 15 N as shown. During the push, the object accelerates uniformly to the right at 2.50 m/s2. What must be the magnitude of the force of friction also acting on the object during the push?
16. Which one of the following is NOT a vector quantity?
17. A new radio station broadcasts its signal with a wavelength of 3.40 m. At what frequency is this station broadcasting?
The next two questions share the same information Base your answers to questions 18 and 19 on the information and diagram below.

 The motion of an object moving along a straight line is given by the velocity vs. time graph shown. 18. Which one of the following choices best represents the average acceleration of the object during the time interval from t = 4.0 s to t = 9.0 s?
19. Which one of the following choices best represents the instantaneous acceleration of the object at the time of t = 5.0 s?

20. The transistor is a solid piece of semiconducting material with many applications in electronics. The initial development of transistors and the Nobel Prize awarded for its invention occurred closest to which calendar year?
21. Which one of the following choices best represents the time it takes for light coming from the Moon’s surface to reach the Earth?
22. Three moles of an ideal gas occupy a container of volume 2.5 x 10-2 m3. The pressure inside this container is 5.00 x 105 Pa. Which one of the following choices best represents the temperature of the gas?
23. A string, clamped at both ends, has its tension fixed. A wave generator vibrates the string with a frequency f producing waves of wavelength which have speed v. The frequency of the wave generator now is doubled to 2f. Which one of the following choices best describes the new values of the wavelength of waves produced and the speed of the waves on the string? 24. Two wave pulses travel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?  25. The product (3 Teslas)×(2 meters)×(4 meters/second) is equivalent to which one of the following?