1. Complete the following regarding the application of sound waves in medical science.
a) What type of medical imaging uses sound waves?
b) Explain how this form of imaging works.
2. The most harmful of the three common types of nuclear radiation is the
a) alpha particle.
b) beta particle.
c) gamma ray.
d) All have the same penetrating ability.
3. What is the difference between longitudinal and transverse waves, provide an example of each. Explain why sound waves cannot travel in a vacuum but light can.