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Modern Physics: Help and Review Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Becky was recently diagnosed with an aggressive brain tumor. Her oncologist recommended treating the tumor with cobalt-60 due to its precision with treating this type of cancer. This substance is being used for _____.

Question 2 2. Carbon-10 has a half-life of about 19 seconds. How many half-lives does it undergo in 2 minutes and 32 seconds?

Question 3 3. Why should you avoid looking directly at magnesium burning?

Question 4 4. Which of the following is really just a high-energy electron?

Question 5 5. The type of nuclear power that occurs when a heavier atom splits into smaller pieces, which is the most common on Earth is known as _____.

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Question 6 6. During a nuclear reaction, mass is lost. Which of the following does this result in?

Question 7 7. The equation E = mc2 shows that mass and energy are:

Question 8 8. Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed?

Question 9 9. Which of the following is an example of when an electron absorbs energy?

Question 10 10. Which of these is an observation Einstein made in the photoelectric effect experiment?

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Question 11 11. What is the energy required to break a nucleus into its individual nucleons called?

Question 12 12. When a larger particle is broken down into component parts, the sum of the masses of the component parts is slightly less than the mass of the larger particle. Which of the following accounts for this?

Question 13 13. The difference between the mass of the nucleus and the sum of each individual nucleon is:

Question 14 14. An electron is traveling at 50 meters per second. If the mass of an electron is 9.1 x 10^-31, what is the de-Broglie wavelength of the electron?

Question 15 15. If a substance has a half-life of 5 years, then how much of the initial sample remains after 15 years?

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Question 16 16. What is a photon?

Question 17 17. Consider an object approaching the speed of light. Which of the following is accurate?

Question 18 18. Which of the following symbols represents the speed of light?

Question 19 19. Which of the following statements is NOT true regarding the process of nuclear fusion?

Question 20 20. Einstein's equation for the relativity of mass and energy suggests that ...

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Question 21 21. What is wave-particle duality?

Question 22 22. Which of the following defines wave-particle duality?

Question 23 23. Which of the following can be shielded by a piece of paper?

Question 24 24. Rochelle has been experiencing fatigue, depression, and has had difficulty concentrating. Her physician believes she has an underperforming thyroid and wants to run some tests. Iodine-131 will be used to study the activity of Rochelle's thyroid. This substance is an example of _____.

Question 25 25. Which of the following is an application of wave-particle duality?

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Question 26 26. The Bohr model of the atom:

Question 27 27. Why do everyday objects not show wave properties?

Question 28 28. When an electron moves from an excited state to a ground state, it will _____.

Question 29 29. Despite human skin providing protection against alpha particles, why is it dangerous to ingest alpha particles?

Question 30 30. Who was the first to mathematically express the full concept of wave-particle duality?

Modern Physics: Help and Review Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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