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help plz i beg you,it is very important and if i don't finish this i will fail?
(1) where does background ultraviolet radiation come from?
(2)how should a radiation worker feel about use of radiation sources?
(a)they should be handled with care, but they are always dangerous (b)the hazards associated with handling any radiation source depends on time, distance and shielding(c)they are always extremely dangerous to work with
(3)a beta particle is simply a high speed _____
(a) alpha particle (b) proton (c) neutron (d) helium nucleus (e) electron
(4) which of the following things would you say are naturally radioactive?
(a) air (b) water (c) air and soil (d) soil (e) all of the above
(5) one valuable characteristic of fission is the amount of energy released for each disintegrating atom is ________.
(a) one of the largest known (b) substantial (c) small (d) intermediate (e) unlimited
(6) when large unstable nuclei split because the electric force is greater than the nuclear force, this is called ______
(a)nucleus (b)nuclear physics (c)artificial radioactivity (d)natural radioactivity (e)artificial transmutation
(7) the radioactive emissions which have no electric charge are _______
(a)proton (b)gamma rays (c)alpha particles (d)helium nuclei (e)beta particles
(8) when a nucleus splits, the mass number is equal to the ______
(a)mass number of the ejected particle (b)mass number of the remaining nucleus (c)the energy released (d)the sum of a and b (e)none of the above
(9) which of the following radioactive emissions is not a particle
(a)proton (b)alpha (c)beta (d)neutron (e)gamma ray
6 Answers
- 1 decade agoFavorite Answer
WHY DNT U JST STDY THT....IF WE GONNA ANSWER ALL UR QUESTNS HERE IT'LL MAKE U LAZY.....
- 1 decade ago
Oh what the hell, knowledge is knowledge and even though you might fail you might actually learn something too:
1. Generally, from the sun. The sun gives off many different forms of radiation, including infra-red (which we feel as heat), visible light, and ultraviolet radiation, which we can't see but which can age or burn our skin.
2. Probably the best answer is (b)
3. A beta particle is a high speed electron. Beta decay is where a neutron decays to a proton (positive charge) and emits an electron (negative charge).
4. Probably all, though levels are relatively low.
5. I hate questions like this. They have an air of subjectivity about them in terms of definition. It's certainly not (c) or (e), and (d) is meaningless. It's certainly substantial so (b) is a possibility.
As for (a) "One of the largest known?" Maybe, but then what level of knowledge are we talking about? Are we comparing with theoretical technologies that may be "known" but have not yet been practically implemented?
6. Artificial transmutation
7. Gamma rays. A proton has a single +ve charge, an alpha particles are the same as helium nuclei, with 2 +ve charges, and beta particles are electrons with a single -ve charge.
8. (d)
9. Gamma ray - it's a wave, not a particle!
Source(s): Personal knowledge + a little bit of Wikipedia to refresh - chickey_soupLv 61 decade ago
In the time it took you to post that you could have looked up the answers.
and if not finishing this means you fail - that means you haven't been doing well all year - which means you should probably fail.
- DaveLv 71 decade ago
1. the sun
2.a
3.neutron
4.proton
5.a
6.c
7.e
8, c
9.e
If someone else disagrees with any of these go with that because it's been a long time for me since I studied this.
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- 1 decade ago
The answer to all of those questions is.....ready?......wait for it.....
you should have studied for your final!!! Sorry....
