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Homework Help: Helpppp Pleaseee

  1. Feb 22, 2007 #1
    Helpppp!! Pleaseee

    Today we had a sub teacher. This worksheet is due tomorrow. Is there any help I can get? Not just answers but explainations?


    Confused on a couple questions:

    1. The splitting of a nucleus of an atom to obtain energy is called:
    fusion
    fission
    alpha numeric
    sunlight

    2. Which type of nuclear reaction could produce a virtually limitless and clean source of energy?
    fusion
    fission
    alphanumeric
    nuclear detonation

    3. Which of the following is a use for nuclear energy?
    -Making large explosions
    -Injecting radiactive isotopes into humans
    -Carbon dating really old things

    4.The form of radiation that is a particle consisting of two neutrons and two protons is:
    -alpha
    -beta
    -gamma
    -lighta

    7. Why is the strong nuclear force needed to keep the nucleus together?
    -Protons and electrons repel with each other.
    -Protons repel each other
    -Protons and electrons attract each other
    -Neutrons and protons attract each other

    8. The energy involved in a chemical change is ___ than that of a phase change.
    -more
    -less
    -about the same
    -none are correct

    9. In a ____ change, the molecules and atoms retain their identity but change state.
    -phase
    -chemical
    -nuclear
    -positional

    10. In a fusion reaction what happens to the missing mass?
    - It is converted to steam
    - It is converted to ice
    - It is converted to energy
    - It disappears and is lost for useful purposes

    11. The atomic change that produces the largest amount of energy is
    - chemical
    - physical
    - phase
    - nuclear

    12. When does beta decay occur?

    - When an atom has far greater neutrons than protons
    - When an atom has far greater protons than neutrons
    - When an atom has far greater electrons than protons
    - When an atom has far greater protons than electrons
    - When an atom has far greater electrons than neutrons

    13. Gamma rays can be completely blocked by:
    - sheet of paper
    - cubed of tin foil
    - cubed concrete
    - lead pencil
     
  2. jcsd
  3. Feb 22, 2007 #2

    cristo

    User Avatar
    Staff Emeritus
    Science Advisor

    Please show your work before we can help. What thoughts do you have on the questions?
     
  4. Feb 22, 2007 #3
    1. The splitting of a nucleus of an atom to obtain energy is called:
    fusion
    fission
    alpha numeric
    sunlight

    2. Which type of nuclear reaction could produce a virtually limitless and clean source of energy?
    fusion
    fission
    alphanumeric
    nuclear detonation

    3. Which of the following is a use for nuclear energy?
    -Making large explosions
    -Injecting radiactive isotopes into humans
    -Carbon dating really old things

    4.The form of radiation that is a particle consisting of two neutrons and two protons is:
    -alpha
    -beta
    -gamma
    -lighta

    7. Why is the strong nuclear force needed to keep the nucleus together?
    -Protons and electrons repel with each other.
    -Protons repel each other
    -Protons and electrons attract each other
    -Neutrons and protons attract each other

    8. The energy involved in a chemical change is ___ than that of a phase change.
    -more
    -less
    -about the same
    -none are correct

    9. In a ____ change, the molecules and atoms retain their identity but change state.
    -phase
    -chemical
    -nuclear
    -positional

    10. In a fusion reaction what happens to the missing mass?
    - It is converted to steam
    - It is converted to ice
    - It is converted to energy
    - It disappears and is lost for useful purposes

    What is a fusion reaction?
    11. The atomic change that produces the largest amount of energy is
    - chemical
    - physical
    - phase
    - nuclear

    I think nuclear is strong. I'm unsure.

    12. When does beta decay occur?
    - When an atom has far greater neutrons than protons
    - When an atom has far greater protons than neutrons
    - When an atom has far greater electrons than protons
    - When an atom has far greater protons than electrons
    - When an atom has far greater electrons than neutrons


    13. Gamma rays can be completely blocked by:
    - sheet of paper
    - cubed of tin foil
    - cubed concrete
    - lead pencil

    I think concrete. The other answers isnt as strong.


    *I would like someone to kind of explain a little bit of each to me if possible. My sub handed a worksheet out today, no text book to refer to nothing. So I'm really stuck.

    Also I can define the words to understand more of the question.
     
  5. Feb 22, 2007 #4
    Do you have a textbook? Wikipedia would be able to help with most, as well. I am sure there are lots of people that could explain each process in detail very well, but aside from it being pretty tedious, the text book has already done it! :P

    Here is one to get you started. http://en.wikipedia.org/wiki/Nuclear_fission
     
  6. Feb 22, 2007 #5
  7. Feb 22, 2007 #6

    cristo

    User Avatar
    Staff Emeritus
    Science Advisor

    surfergirl.. I think you should put some effort in. You should at least be able to narrow down most of the questions to a maximum of 2 answers.

    For example: Q1, do you think that sunlight splits an atom?
     
  8. Feb 23, 2007 #7

    chemisttree

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    This is pretty funny!
     
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