008 10.0 points The graph below represents the potential en- ergy U as a function of displacement for an object on the end of a spring (F = -ka) oscillating in simple harmonic motion with amplitude U maz - + Which graph represents the kinetic energy K of the object as a function of displacement x? 1. 2. 3. 4. 5. K maz K K mar -I K +11+2 K +2 +Imas K 'max IIIVIII 2 -2 maz "max 6. y 7. t Kmaz K maz K K maz 4+++2 x+ 009 10.0 points 8.7 waves crash onto a beach every 49.5 s. What is their frequency? 1. 0.233918 2. 0.116531 3. 0.180198 4.0.426136 5.0.150943 6.0.573248 7.0.175758 8.0.58104 9. 0.559006 10. 0.272572 Answer in units of Hz. 010 10.0 points A state trooper's car sends out a radar signal at a frequency of 8.63 GHz. Find the wavelength of this signal. The wave speed is 2.998 x 10 m/s. 1. 0.0445468 2. 0.0472871 3. 0.0501338 4. 0.0272545 5. 0.0347393 6. 0.0258448 7. 0.0222074 8. 0.0211127 9. 0.0329451 10. 0.0293922 Answer in units of m. 011 10.0 points A string with a linear mass density of 0.001 kg/m carries a tension of 0.4 N. A 100 Hz sinusoidal wave on this string has a wavelength of: 1.500 cm 2. 2000 cm 3. 20 cm 4. 0.05 cm 5.2 cm 012 10.0 points A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 38.7 kHz, and the speed of sound in air is 355 m/s, what is the smallest insect a bat can detect? 1.5.22124 2. 7.50524 3.5.05797 4. 10.7165 5. 6.90802 6. 18.1771 7.7.2379 8. 10.2616 9. 7.42004 10.9.17313 Answer in units of mm. 013 (part 1 of 2) 10.0 points An ambulance is traveling north at 61.6 m/s, approaching a car that is also travel- ing north at 33.9 m/s. The ambulance driver hears his siren at a frequency of 949 Hz. -61.6 m/s Ambulance -33.9 m/s Car What is the wavelength at any position in front of the ambulance for the sound from the ambulance's siren? The velocity of sound in air is 343 m/s. 1. 0.342162 2.0.516348 3. 0.405014 4. 0.473387 5. 0.505575 6.0.468167 7. 0.292909 8.0.34994 9. 0.296523 10.0.327346 Answer in units of m. 014 (part 2 of 2) 10.0 points At what frequency does the driver of the car hear the ambulance's siren? 1. 1042.42 2. 889.294 3. 1090.24 4. 570.766 5. 599.014 6. 716.622 7.668.953 8.555.903 9. 769.623 10.922.225 Answer in units of Hz.