Transcript Physics MCAT Review - University of North Dakota

Passage VI Q 107-112 MCAT 1
Q 107
Which of the following describes the
direction of the motion of alpha, beta, and
gamma rays in the presence of an external
magnetic field?
A. They all travel straight.
B. They all are bent in the same direction
C. Gamma rays travel straight; alpha and
beta rays are bent in the same direction.
D. Gamma rays travel straight; alpha and
beta rays are bent in opposite directions.
Passage VI Q 107-112 MCAT 1
Q 108
The fissioning of the 23592U nucleus involves
the release of energy. Which of the
following describes the main energy
transfer that takes place?
A. Kinetic to potential.
B. Mass to kinetic
C. Potential to mass
D. Kinetic to electrical
Passage VI Q 107-112 MCAT 1
Q 109
A radioactive series begins with 23892U and
has an intermediate product of 23492 U.
Which of the following describes a possible
sequence of particle emissions that occurs
between these two atoms?
A. Beta, beta, beta, beta.
B. Alpha, beta, beta, beta.
C. Alpha, alpha, beta, beta.
D. Alpha, beta, beta.
Passage VI Q 107-112 MCAT 1
Q 110
A sample of radiosium (2411Na) has a halflife of 15 hr. If the sample’s activity is 100
millicuries after 24 hr, approximately what
must its original activity have been?
A. 200 millicuries.
B. 300 millicuries.
C. 600 millicuries.
D. 1000 millicuries.
Passage VI Q 107-112 MCAT 1
Q 111
In a radioactive series, a nucleus decays
through several steps. The thorium series
starts with a 23290Th atom, then emits 1
alpha, 2 beta, 4 alpha, 1 beta, 1 alpha, and
1 beta, in succession. The final product of
the series is:
A. 20882Pb.
B. 20888Ra.
C. 22082Pb.
D. 22088Ra.
Passage VI Q 107-112 MCAT 1
Q 112
When a nucleus emits a 2.5 MeV gamma
ray, by how much does the nuclear mass
decrease?
A. 2.8 X 10-28 kg.
B. 1.2 X 10-28 kg.
C. 4.4 X 10-30 kg.
D. 8.6 X 10-31 kg.
Passage VIII Q 124-127 MCAT 1
Q 124
The densities of the balls, D1, D2, and D3,
are related by which of the following?
A. D1 < D2 < D3.
B. D1 < D2 = D3.
C. D1 = D2 < D3.
D. D1 = D2 > D3.
Passage VIII Q 124-127 MCAT 1
Q 125
Ball 2 is in the water 20 cm above Ball 3.
What is the approximate difference in
pressure between the two balls?
A. 2 X 102 N/m2.
B. 5 X 102 N/m2.
C. 2 X 103 N/m2.
D. 5 X 103 N/m2.
Passage VIII Q 124-127 MCAT 1
Q 126
Assume that the density of Ball 1 is
8.0 x 102 kg/m3. Ignoring atmospheric
pressure, what fraction of Ball 1 is above
the surface of the water?
A. 4/5
B. 3/4
C. 1/4
D. 1/5
Passage VIII Q 124-127 MCAT 1
Q 127
Assume that the side of the water tank is
punctured 5.0 m below the top of the water,
and the atmospheric pressure is
1.0 x 105 N/m2. What is the approximate
speed of the water flowing from the hole?
A. 10 m/s
B. 12 m/s
C. 14 m/s
D. 17 m/s
Passage VII Q 99-103 MCAT II
Q 102
If all the current in the lamp is due to
electron motion, how many electrons are
emitted from the cathode each second
when the current is 0.2 A?
A. 2.50 x 1018
B. 1.25 x 1018
C. 1.60 x 1017
D. 1.25 x 1017
Passage VII Q 104-109 MCAT II
Q 108
A nuclear reactor operates most efficiently
if its shape contains the minimum surface
area for neutrons to escape for any specific
volume. The most efficient reactor would
be in the shape of a:
A. cube.
B. sphere
C. cylinder
D. slab
No Passage Q 117 MCAT II
Q 117
A 12-V battery causes a current to flow
through a circuit consisting of a 24- and
an 8- resistor in parallel. What current
flows through the 8- resistor?
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Passage IX Q 120-124 MCAT II
Q 122
What physical quantity is represented by the
area of quadrilateral OABC in Figure 2?
A. Average speed of the box
B. Average acceleration of the box
C. Distance traveled by the box
D. Work done on the box
Passage IX Q 120-124 MCAT II
Q 123
Which of the following expressions is equal
to a, the acceleration vector of the box as it
moves from Point B to Point C? (Note: The
coefficient of friction between the box and
the surface between Point B and Point C is
equal to kh.)
A. (-g + kh)i
C. khg i
B. (-g/kh)i
D. - khg i