I Need Help If I Dont Pass This I Will Fell The Ninth Grade?

(1) The force of repulsion between protons in the nucleus of small atoms is _____ the nuclear force of attraction.
(a) greater than (b) equal to (c) less than (d) too small to be measured compared with (e) both b and d
(2) The range of half-lives of different radioactive elements is from _____.
(a) hours to years (b) days to months (c) seconds to billion of years (d) hours to weeks (e) days to weeks
(3) Hydrogen nuclei collide at high speeds to form helium nuclei. This is called ______.
(a) fission (b) half-life (c) a reactor (d) radioactivity (e) fusion
(4) a device which controls the rate of nuclear fission reaction is called a(n) ______.
(a) hydrogen bomb (b) chain reaction (c) atomic bomb (d) nuclear reactor (e) electrostatic precipitator
(5) The process in which each split atom gives up neutrons which in turn split other atoms and so on is called a(n) ______.
(a) disaster (b) nuclear reactor (c) fusion reaction (d) chain reaction (e) meltdown
(6) Uranium (235) and uranium (238) have the same number of protons but different numbers of neutrons. These 2 elements are said to be radioactive _______.
(a) half-lives (b) isotopes (c) bombs (d) molecules (e) tracers
(7) large nuclei are unstable because the nuclear force _______.
(a) increase as protons move farhter apart (b) decrease as protons move farther apart (c) remains unchanged as protons move farther apart (d) remains unchanged as protons come closer together (e) both a and d
(8) The radioactive emission with the weakest penetrating power is the _______.
(a) alpha (b) X ray (c) gamma (d) beta (e) neutron
(9) The atom that remains after a nucleus disintergrates is______.
(a)larger than the original atom and possibley radioactive(b)larger than the original atom and not radioactive(c)smaller than the original atom and not radioactive(d)larger than the original atom and not radioactive(e)smaller than the original atom and possibly radioactive
(10) In a nuclear disintegration (splitting of an atom), the particle that is ejected may be ______.
(a) a helium nucleus (b) a high speed electron (c) a neutron (d) energy (e) a, b, or c

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This entry was posted on Friday, December 18th, 2009 at 11:30 am and is filed under speed tracer. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

8 Responses to “I Need Help If I Dont Pass This I Will Fell The Ninth Grade?”

  1. 1. b
    2. c
    3.e
    4.d
    5.d
    6.b
    7.c
    8.a
    9.e
    10.d
    Again if someone disagrees with any of these go with that. It’s been a long time since I’ve even thought about this except in terms of quantum theory, the LHC, string theory etc.

  2. I guess next time you’ll work harder, huh?
    And it’s “Fail” by the way.

  3. Get a book and read it or repeat the ninth grade.

  4. OMG
    IS THIS NINTH GRADE WORK ?!?!
    im in the ninth grade and i don’t know any of this ^^”

  5. seems like you will FAIL science….and you only want someone to do the work for you; i.e. figure it out!

  6. fell….i think you mean FAIL
    and it seems like you will just fail science….not that whole grade

  7. Well by the title ( fell) = Fail. maybe you should have paid attention better in school. you know study !

  8. 1 is c
    2 is c
    3 is e
    4 is d
    5 is d
    6 is b
    7 is b i think but am not sure
    8 is a
    9 is e me thinks but not sure
    10 is e
    now do study yourself as well child ok. the time it took u to ask the question u could have researched all that and more.

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