Question 1 (1 point) all An ambulance siren is emitting a sound with a frequency f5. The ambulance is driving toward the base of a large cliff at speed 12.1. If the frequency of the reflected sound heard by the occupants of the ambulance is 10% higher than the frequency of the siren, which of the following statements best describes the situation? 0 The ratio of the speed of the ambulance to the speed of sound in air cannot be determined because the ambient temperature has not been given. 0 The speed of the ambulance is greater than 15% of the speed of sound in air. 0 The speed of the ambulance is about 10% of the speed of sound in air. 0 The speed of the ambulance is about 5% of the speed of sound in air. Question 3 (1 point} Aloud cat emits a wail that has an intensity of 8. 5 X 105 W/m2. A dog makes a loud barking sound with that has a sound level of 85 dB. Which of the following statements is true? (Note: I0 : 1012 W/m2) O The sound level of the cat is greater. O The intensity of the dog's sound is greater. 0 Both sounds are the same intensity. 0 There is insufficient information to compare the intensity of the two sounds. Question 2 (1 point) Listen Which statement about a closed thermodynamic cycle is always true? OAQ = 0 OAW = 0 OEint = 0 if and only if AQ = 0 and AW = 0 OEint = 0