Brain fingerprinting is a controversial new tool used in helping to solve crimes. In 2-3 pages, discuss what criteria from
Frye and/or
Daubert will the process need to meet to be admissible as evidence in court? Be specific and support your answers.
Radiometric Dating
- Name
the three kinds of strength used to characterize materials AND give an
example of a material that are strong in each of these modes.
- What kinds of bonding occurs in each of the three materials you listed in question #1?
- Explain how atoms can be arranged in such a way to create a permanent magnet.
- Identify
10 objects in your home that use semiconductors. What other kinds of
materials with special electrical properties are found in all of these
10 objects?
- Research the status of magnetically levitated trains
like the one now operating in China. How does it operate? How fast
might it go?
- How does a nuclear reactor work?
- What
types of researchers and scientists use carbon-14 radiometric dating?
What type of researcher would use the other isotopes such as
uranium-238?
- Use the periodic table to identify the element, its atomic number, mass number and electrical charge of the following:
# Protons | # Neutrons | # Electrons | Element Symbol | Atomic Number | Mass | Electrical Charge |
1 | 0 | 1 | | | | |
8 | 8 | 8 | | | | |
17 | 18 | 18 | | | | |
36 | 50 | 36 | | | | |
- Potassium-40
decays into argon-40 with a half-life of 1.2 billion years. A
particular mineral grain is known to have had a million potassium atoms
in its crystal structure when it formed. When the grain was ground up,
scientists discovered 750,000 atoms of argon-40. When did the grain
form? (Hint: Use Figure 12-10 on page 272 to obtain a qualitative
estimate).
- What are the half-lives of the following common isotopes:
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