1. Questions:
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3. 1. What is the theory of relativity?
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   2. Who developed the theory of relativity?
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   3. What are the two main postulates of the theory of relativity?
    
6. 4. What implications does the theory of relativity have on time delay? Explain
   
   5. What are the implications of the theory of relativity for the global positioning system (GPS)?
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   6. In what other situations of daily life can we apply the theory of relativity? Explain
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