1. An empty drum weighs 1.035 kg and when filled with benzene it weighs 5.418kg. If the density of benzene is 0.8766 g/mL, calculate the volume of benzene in the drum. Be sure to consider the units and significant figures.
2. Can the terms ‘mass' and ‘weight' be used interchangeably - explain.
3. Complete the following questions about nuclear radiation.
a) Discuss four vital factors that should be used in minimising the effects of radiation.
b) What is most effective shielding that can be used for protection from the following radiation types?
• alpha particles
• beta particles
• gamma rays
4. a) Explain what is meant by the terms hydrostatic pressure and hydrodynamic pressure?
b) Which of these terms can be used when discussing cardiac output?
5. A radioactive isotope, used in the agricultural industry has a half life of 8 days. On application, the radiation is emitted is measured at 12500 counts per sec (cps). If the area that it is applied to cannot be used until the radiation strength is less than 50 cps how long will it take before the site can be used again? (Hint assume initial strength is 100%)
6. Which two of the following are able to be calculated, based on the data provided.
Amplitude, wavelength or frequency.
7. Perform the calculation of the two wave characteristics and explain why it is not possible to calculate the third.
8. What is the difference between longitudinal and transverse waves, provide an example of each.
9. Explain why sound waves cannot travel in a vacuum but light can.
10. 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.
11. 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.
12. Explain what is meant by the term ‘half-life of a radioactive substance'.