Question

Fifty Seven Questions (no explanation required only answer)
Number then answer (ex. 11-4 C, 8 A, 11 D)
11-4) Both X rays and gamma rays are emitted from (a)
different parts of the atom (b) a variety of certain atomic
nuclei
11-8) Once an alpha particle is outside the nucleus it is (a)
free to wander about the nucleus (b) quickly bound to a
neighboring nucleus (c) electrostatically repelled (d)
radioactive
11-11) An atom with an imbalance of electrons to protons is
(a) a hadron (b) a baryon (c) an ion (d) an isotope (e) none
of these
11-16) Electric forces within an atomic nucleus tend to (a)
hold it together (b) push it apart (c) neither of these
11-31) Pure elements can be transformed into entirely different
elements. This statement at the present time is (a) true (b)
false
11-40) The most harmful radiations are those that (a) kill
living cells (b) damage living cells
11-43) A sample of relatively active radioactive material is
somewhat (a) warmer than the environment (b) cooler than
the environment (c) neither really
11-44) Which body is heated in its interior by nuclear
processes? (a) the sun (b) the earth (c) both (d) neither
11-47) When a nucleus emits a positron, its atomic number (a)
increases by 1 (b) decreases by 1 (c) doesn't change
11-53) Artificially induced radioactive elements generally have
(a) long half lives (b) short half lives
11-56) In a mass spectrometer, a variety of singly-ionized
atomic nuclei are directed into a magnetic field where they
are deflected and strike a detecting screen. The particles to
undergo the greatest deflection are the particles with the (a)
least mass (b) greatest mass (c) same for all
11-59) The half lives of elements beyond uranium are too short
for these elements to occur in natural deposits. But elements
below uranium that have equally short half lives do occur in
natural deposits. This is because they are (a) the small
leftover of huge abundances when the earth formed (b)
subdued and preserved by pressures beneath the earth (c)
bound with longer-living elements (d) the products of
uranium decay
11-60) In bubble chambers, charged particles move in spirals
because (a) the magnetic field decreases (b) the electric
charge decreases (c) the electric charge increases (d) of
perspective and parallax (e) of energy dissipation
11-61) In order for an atom to decay to an element which is one
greater in atomic number, it can emit (a) one alpha particle
and 3 beta particles (b) one positron and 2 beta particles (c)
one beta particle (d) all of these (e) none of these
11-62) An element emits 1 alpha particle, 1 positron, and 3 beta
particles. Its atomic number (a) decreases by 2 (b)
decreases by 1 (c) stays the same (d) increases by 1 (e)
increases by 2
11-66) A Geiger counter placed 1 meter from a point source of
radiation registers 100 counts per second. If the Geiger
counter is moved closer - to 0.5 meter from the source, what
will the count rate be? (a) 25 counts/min (b) 50 counts/min
(c) 100 counts/min (d) 200 counts/min (e) 400 counts/min


11-70) Compared to the mass of a uranium nucleus before
splitting, the pieces it splits into have (a) less mass (b) the
same mass (c) more mass
11-72) A chain reaction grows when the fraction of liberated
neutrons which go on to cause further fissions is (a) more
than half (b) half (c) less than half (d) 99%
11-73) When a lump of uranium is broken into smaller pieces,
the total surface area of the lump (a) decreases (b) remains
the same (c) increases
11-74) Which will leak more neutrons, two separate lumps of
uranium or the same two lumps stuck together? (a) Two
separate lumps (b) The same two lumps stuck together (c)
Both the same
11-75) A sphere of pure U-235 will explode if it is (a) hot
enough (b) shaken herd enough (c) big enough (d) small
enough
11-81) Plutonium is chemically toxic when it is (a) oxidized
(b) not oxidized (c) oxidized or non-oxidized (d) but
plutonium in any form is not chemically toxic
11-82) The effect of putting small amounts of Pu-239 with
U-238 is converting U-238 to (a) Th-239 (b) Pa-239 (c)
U-235 (d) Pu-239 (e) Pb-206
11-84) Three isotopes that undergo nuclear fission are (a)
Th-239, U-235, Pu-239 (b) Th-238, U-235, Pu-239 (c)
Th-235, U-235, Pu-239 (d) U-233, U-235, Pu-239 (e) none
of these
11-85) A nucleon has more potential energy with respect to a
nucleus when it is (a) inside the nucleus (b) outside the
nucleus (c) both the same
11-86) A nucleon has more mass when it is (a) inside the
nucleus (b) outside the nucleus (c) both the same
11-91) The nucleus with the most tightly bound nucleons is (a)
hydrogen (b) iron (c) lead (d) uranium (e) plutonium
11-93) A nuclear process that has relatively few radioactive
by-products is (a) fission (b) fusion (c) both of these have
comparable radioactive by-products
11-97) Detonation of a fusion type hydrogen bomb is started by
(a) splitting a small piece of uranium (b) pressing together
several small pieces of uranium (c) igniting a small fission
bomb (d) turning on a laser cross fire (e) none of these
11-100) Present-day research in nuclear fusion uses (a) laser
beams (b) ultra-hot plasmas (c) both of these (d) neither of
these
11-101) The fusion torch is a version of (a) a cyclotron (b) a
hydrogen magnet (c) an electron microscope (d) a linear
accelerator (e) a mass spectrometer
11-103) In gaseous form, at the same temperature, the average
speed of U-238 compared to the speed of U 235 is (a) less
(b) more (c) the same
11-104) Compared to protons, the reason neutrons are effective
nuclear bullets in nuclear reactions is that a neutron has (a)
more mass than a proton (b) more penetrating power than a
proton (c) a wider cross section than a proton (d) all of
these (e) none of these
11-106) In which of these processes is an element of matter
changed into a completely different element? (a) nuclear
fission (b) nuclear fusion (c) both of these (d) neither of
these
11-107) Hydrogen is a first-rate fuel for (a) nuclear reactions
(b) chemical reactions (c) both of these (d) neither of these
11-108) The mass of a nucleus is exactly equal to the sum of the
masses of its individual (a) separated protons (b) separated
neutrons (c) separated nucleons (d) all of these (e) none of
these
11-109) If all the uranium in the world were exhausted, breeder
reactors would be (a) used much more than they are now
(b) researched more than they are now (c) considered more
seriously than they are now (d) relics of a brief age (e) none
of these
11-110) Reactions that take place in a breeder reactor change (a)
elements into different elements (b) molecules into different
molecules (c) ions into different ions (d) all of these (e)
none of these
11-111) When uranium emits a beta particle, the result is a (a) a
different isotope of uranium (b) a transuranic element (c)
protactinium (d) thorium (e) depends on the isotope of
uranium that emits the beta particle
11-112) When U-238 emits an alpha particle, the nucleus left
behind has (a) 90 protons (b) 91protons (c) 92 protons (d)
93 protons (e) 94 protons
11-113) When U-239 emits a beta particle, the nucleus left
behind has (a) 90 protons (b) 91 protons (c) 92 protons (d)
93 protons (e) 94 protons
11-114) When U-235 undergoes fission, the two nuclei that
result have a total of (a) 90 protons (b) 91 protons (c) 92
protons (d) 93 protons (e) 94 protons
11-115) The mass of a nucleon is greatest where its potential
energy is (a) least (b) greatest
11-118) Fissioning an iron nucleus yields a net (a) absorption of
energy (b) release of energy (c) neither absorption nor
release of energy
11-119) Fusing two iron nuclei yields a net (a) absorption of
energy (b) release of energy (c) neither absorption nor
release of energy
11-120) Fissioning a lead nucleus yields a net (a) absorption of
energy (b) release of energy (c) neither absorption nor
release of energy
11-121) If gold were used as nuclear fuel, it would be best (a)
fused (b) fissioned (c) either fused or
11-122) If carbon were used as nuclear fuel, it would be best (a)
fused (b) fissioned (c) either fused or fissioned
11-123) If iron were used as nuclear fuel, it would be best (a)
fused (b) fissioned (c) neither fused nor fissioned
11-124) Compared to the energy produced by fissioning a single
uranium atom, the energy produced by fusing two deuterium
atoms is (a) more (b) less (c) the same
11-125) Compared to the energy produced by fissioning a gram
of uranium, the energy produced by fusing a gram of
deuterium is (a) more (b) less (c) the same
11-126) Compared to the sum of the masses of all the individual
nucleons in their separate states that makeup a nucleus, the
mass of the composite nucleus is (a) more (b) less (c) the
same
11-127) If uranium were split into three equal segments instead
of two, the reaction would be (a) more energetic (b) less
energetic (c) as energetic (d) not enough information is
given for a reasonable estimate
11-129) Suppose a hydrogen bomb were exploded in a box that
could contain the explosion, but conducted heat to the
outside and radiated it away. Compared to the weight before
the explosion, the weight of the box after it cooled to room
temperature would be (a) more (b) less (c) the same
11-130) Which shape uses the smallest amount of material when
creating a critical mass? (a) cube (b) elongated box (c)
cone (d) sphere (e) none of these
11-131) Which element has the smaller critical mass; U-235 that
releases 2.5 neutrons per fission, or Pu-239 that releases 2.7
neutrons per fission? (a) U-235 (b) Pu-239 (c) both would
have the same critical mass
11-133) Could you get rid of plutonium contaminating a soil
sample by bombarding it with neutrons? (a) No (b) Yes, but
you might not like what you got in its place (c) not enough
information is given


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Subject: Physics

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Conceptual Physics - 9th ed. Hewitt