5. The figure shows a standing wave pattern in a string. What is the wavelength of one of the component traveling waves?

(A) 10 cm
(B) 20 cm
(C) 40 cm
(D) 60 cm
(E) 120 cm

1. 1.25 × 0.25 + 1.222 = ______. (A) 1.5345 (B) 1.535 (C) 1.53 (D) 1.5 (E) 2

2. Over a short interval near time t = 0 the coordinate of a bicycle in meters is given byx(t) = 12t – 4t3 , where t is in seconds. At the end of 1 s, what is the acceleration of the bicycle? (A) 23 m/s2 (B) 15 m/s2 (C) -4 m/s2 (D) -12 m/s2 (E) -24 m/s2

3. A 8000-N trunk is pushed along a level road by two men who apply a total forward force of 1000 N. Neglecting friction, what is the acceleration of the trunk? (Gravitational acceleration g = 10 m/s2) (A) 0.0125 m/s2 (B) 0.125 m/s2 (C) 0.8 m/s2 (D) 1.25 m/s2 (E) 8 m/s2

4. An incompressible fluid of density ρ is in a bucket on the elevator floor accelerating upward with acceleration a. What is the pressure difference between two points in the fluid separated by a vertical distance △h? (Gravitational acceleration is g) (A) ρa△h (B) ρg△h (C) ρga△h (D) ρ(g – a)△h (E) ρ(g + a)△h

6. The figure shows four situations in which a source of sound S and a detector D are either moving or stationary. The arrows indicate the directions of motion. The speeds (when not zero) are all the same. (Note that the detector in situation ③ is stationary). Rank the situations according to the apparent frequency of the source, lowest to highest. (A) ①,②,③,④ (B) ④,③,②,① (C) ①,③,②,④ (D) ②,①,④,③ (E) ②,①,③,④

7. What is the deterministic factor of a sound wave for the sound pitch? (A) amplitude (B) frequency (C) phase (D) speed (E) intensity

8. A sample of an ideal gas is taken through the cyclic process abca shown in the figure. The scale of the vertical axis is set by At point a, T = 200 K. What is the temperature of the gas at point c? (A) 400 K (B) 600 K (C) 1419 K (D) 1800 K (E) 4258 K

9. An engine does 15 kJ of work while exhausting 37 kJ to a cold reservoir. What is the efficiency of the engine? (A) 28.8 % (B) 38.8 % (C) 68.8 % (D) 88.8 % (E) 98.8 %

10. The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T that are perpendicular to the page. A set of directions A through H is shown next to the figure. When the two equal currents in the wires are directed up out of the page, the direction of the magnetic field at P is closest to the direction of ______. (A) A (B) E (C) F (D) G (E) H

11. Consider radio waves (r), visible light (v), infrared (i), X-rays (x), and ultraviolet (u). In order of increasing frequency, they are ______. (A) r, v, i, x, u (B) r, i, v, u, x (C) i, r, v, u, x (D) x, u, v, i, r (E) r, i, v, x, u