5 Written Questions

1. No. By the Transducer
2. 1.Mechanical Wave 2.Longitudinal Wave 3.Travels in a straight line 4.travels through a medium 5.Composed of Compression and Decompression
3. 2-10MHz
4. Concentration of mass
   (Mass/Volume) Unit: Kg/cu.cm
5. Less than 20Hz

5 Matching Questions

1. Propagation Speed
2. If Period is in seconds
3. Mechanical Wave
4. Calculate the Wavelength for a 2MHz Transducer
5. Period increases when what decreases?

1. a Frequency
2. b 1540m/s divided by 2,000,000s=.00077m
3. c Frequency must be in cycles/sec or Hz
4. d Creates movement
5. e Distance Sound Wave travels through a Medium
   Units: mm/us, km/s, m/s

5 Multiple Choice Questions

1. No. Only Fetal Lungs, because the are filled with blood
   1. What 4 factors can be changed
   2. Can adult Lungs be scanned?
   3. What is related?
   4. What is unrelated?
2. Power is decreased to 1/4 of it's original value
   1. What Parameter is determined only by the Medium?
   2. 5 Characteristics of a Sound Wave
   3. If Wavelength is in mm and Propagation speed is in mm/us
   4. If Amplitude is decreased to 1/2 of it's original value?
3. Microseconds in Period
   1. Power is Proportional to?
   2. MHz compliments
   3. Megahertz in Frequency compliments
   4. If Period is in seconds
4. Easily
   1. Inversely Related
   2. Frequency and Focal Length
   3. Frequency and Period
   4. High Frequency attenuates?
5. s
   1. Hz compliments
   2. Compression
   3. Decompression
   4. MHz compliments

5 True/False Questions

1. Thick crystal → High frequency

   True        False

2. How are Period and Wavelength related? → Reciprocal Relationship

   True        False

3. What is the Frequency of a wave with a .1us Period → 10MHz

   True        False

4. Power is Proportional to? → Amplitude squared

   True        False

5. Relationship between Wavelength and Frequency → Directly Proportional

   True        False