Q1) lodine 131I is widely used in the treatment and diagnosis of the Thyroid gland.
The radius (in fm) of this isotope is:
A) 131.0
B) 157.2
C) 5.2
D) 5.4
E) 6.1
Q2) A 55-kg person has absorbed a 20-rad dose. How many joules of energy are
deposited in his body?
A)1.1
B) 20
C)11
D) 55
E) 1100
Q3) The activity of 1 gram of radium 22688 Ra is exactly 1 Ci. The half-life of radium
(in years) is:
A) 226
B) 1170
C) 2280
D) 1580
E) 1950
Q4) A 70-kg researcher absorbs 4.5 × 108 neutrons in a workday, each of energy
1.2 MeV. The relative
biological effectiveness (RBE) for these neutrons is 10. What is the equivalent
dosage of the radiation exposure for this researcher, in mrem?
A) 1.2
B) 0.39
C) 0.77
D) 3.7
E) 12
,Q5) A 2.0-mCi source of 32P is implanted in a tumor to give it a 24-Gy dose. The
half-life of 32P is 14.3 days, and 1mCi delivers 10 mGy/min. How long (in min)
should the source remain implanted?
A) 12
B) 1200
C) 2400
D) 300
E) 800
Q6) Ionizing radiation can be used on meat products to reduce the levels of
microbial pathogens. Assume that for refrigerated meat the upper allowed limit is
3.8 kGy. If a beam of electrons, each of energy 1.6 MeV, irradiates 3.0 kg of beef,
how many electrons should the beef mass absorb to reach the upper allowed
limit?
A) 3.8 x 1010
B) 4.5 x 1010
C) 3.8 x 1016
D) 4.5 x 1016
E) 1.6 x 1010
Q7) A biological tissue of mass m is exposed to 60 rad of alpha radiation. How
many rads of slow neutrons can cause the same damage to the same tissues? (For
alpha RBE=20, for slow neutrons RBE = 5).
1) 240
B) 300
C) 60
D) 360
E) 1200
Q8) A blood vessel of radius r splits into two smaller vessels, each of radius r /3.
If the velocity in the larger vessel is v, then the velocity in each of the smaller
vessel is:
A) 9v
B) v/9
C) 2v/9
D) v
E) 9v/2
,09) Water flows into the top floor of a 16 m high building through a pipe of
constant 2 cm diameter. At the base of the building (ground level) the water flows
into the pipe at a speed of 60 cm/s where the gauge pressure is 3.2 atm. The
gauge pressure (in atm) in the pipe in the top floor is:
A) 0
B) 1.65
C) 2.65
D) 1.54
E) 3.2
Q10) The surface of water in a tank supplying water to a house is 7 m above the
faucet ( )حنفيةin the house. If the faucet is 2.0-cm diameter, how long (in s) does it
take to fill a 0.25-m3 container in the house?
A) 95
B)57
C) 68
D) 80
E) 136
Q11) How much force (FM in N) must the biceps muscle exert when a 5.0-kg mass
is held in the hand with the forearm being in static equilibrium in a horizontal
position as in the figure. Assume that the elbow joint, O, is 5 cm far from the
point
of application of FM, and that the mass of forearm and hand together is 2.0 kg.
A) 800
B) 402
C) 100
D) 200
E) 50
Q12) The figure shows a uniform, horizontal beam (length = 8 m, mass = 25
kg) that is pivoted to the wall by a hinge at point O, with its far end supported
by a cable that makes an angle of 51° with the horizontal. If a person (mass = 60
kg) stands 3.0 m from the pivot, what is the horizontal component of the hinge
force (in N) acting at point 0?
A) 380
B) 189
, C) 0
D) 20
E) 278
Q13) The kinetic energy of a car moving along a horizontal road is 130 kJ. The
driver applies the breaks, and the car stops in 20 m. The force of friction (in N)
(assumed constant) is:
A) 260000
B) 2600
C) 130000
D) 6500
E) 1300
Q14) A 55-kg athlete climbs a 9 m long rope in 10s. His average power output (in
W) is
A) 231
B) 485
C) 550
D) 90
E) 331
Q15) A 4.0 kg mass is placed on a rough surface that makes an angle of 20° with
the horizontal. If the mass is on the verge of motion, then the coefficient of static
friction (µs) is
A) 0.36
B) 0.94
C) 0.87
D) 0.11
E) 0.34
Q16) A student moves 6 m along the positive x-direction, then he turns around
and moves 9 m along the
negative x-direction. His average velocity (in m/s) over the 7.0 s total interval of
motion is:
A) -3
B) 0.43
The radius (in fm) of this isotope is:
A) 131.0
B) 157.2
C) 5.2
D) 5.4
E) 6.1
Q2) A 55-kg person has absorbed a 20-rad dose. How many joules of energy are
deposited in his body?
A)1.1
B) 20
C)11
D) 55
E) 1100
Q3) The activity of 1 gram of radium 22688 Ra is exactly 1 Ci. The half-life of radium
(in years) is:
A) 226
B) 1170
C) 2280
D) 1580
E) 1950
Q4) A 70-kg researcher absorbs 4.5 × 108 neutrons in a workday, each of energy
1.2 MeV. The relative
biological effectiveness (RBE) for these neutrons is 10. What is the equivalent
dosage of the radiation exposure for this researcher, in mrem?
A) 1.2
B) 0.39
C) 0.77
D) 3.7
E) 12
,Q5) A 2.0-mCi source of 32P is implanted in a tumor to give it a 24-Gy dose. The
half-life of 32P is 14.3 days, and 1mCi delivers 10 mGy/min. How long (in min)
should the source remain implanted?
A) 12
B) 1200
C) 2400
D) 300
E) 800
Q6) Ionizing radiation can be used on meat products to reduce the levels of
microbial pathogens. Assume that for refrigerated meat the upper allowed limit is
3.8 kGy. If a beam of electrons, each of energy 1.6 MeV, irradiates 3.0 kg of beef,
how many electrons should the beef mass absorb to reach the upper allowed
limit?
A) 3.8 x 1010
B) 4.5 x 1010
C) 3.8 x 1016
D) 4.5 x 1016
E) 1.6 x 1010
Q7) A biological tissue of mass m is exposed to 60 rad of alpha radiation. How
many rads of slow neutrons can cause the same damage to the same tissues? (For
alpha RBE=20, for slow neutrons RBE = 5).
1) 240
B) 300
C) 60
D) 360
E) 1200
Q8) A blood vessel of radius r splits into two smaller vessels, each of radius r /3.
If the velocity in the larger vessel is v, then the velocity in each of the smaller
vessel is:
A) 9v
B) v/9
C) 2v/9
D) v
E) 9v/2
,09) Water flows into the top floor of a 16 m high building through a pipe of
constant 2 cm diameter. At the base of the building (ground level) the water flows
into the pipe at a speed of 60 cm/s where the gauge pressure is 3.2 atm. The
gauge pressure (in atm) in the pipe in the top floor is:
A) 0
B) 1.65
C) 2.65
D) 1.54
E) 3.2
Q10) The surface of water in a tank supplying water to a house is 7 m above the
faucet ( )حنفيةin the house. If the faucet is 2.0-cm diameter, how long (in s) does it
take to fill a 0.25-m3 container in the house?
A) 95
B)57
C) 68
D) 80
E) 136
Q11) How much force (FM in N) must the biceps muscle exert when a 5.0-kg mass
is held in the hand with the forearm being in static equilibrium in a horizontal
position as in the figure. Assume that the elbow joint, O, is 5 cm far from the
point
of application of FM, and that the mass of forearm and hand together is 2.0 kg.
A) 800
B) 402
C) 100
D) 200
E) 50
Q12) The figure shows a uniform, horizontal beam (length = 8 m, mass = 25
kg) that is pivoted to the wall by a hinge at point O, with its far end supported
by a cable that makes an angle of 51° with the horizontal. If a person (mass = 60
kg) stands 3.0 m from the pivot, what is the horizontal component of the hinge
force (in N) acting at point 0?
A) 380
B) 189
, C) 0
D) 20
E) 278
Q13) The kinetic energy of a car moving along a horizontal road is 130 kJ. The
driver applies the breaks, and the car stops in 20 m. The force of friction (in N)
(assumed constant) is:
A) 260000
B) 2600
C) 130000
D) 6500
E) 1300
Q14) A 55-kg athlete climbs a 9 m long rope in 10s. His average power output (in
W) is
A) 231
B) 485
C) 550
D) 90
E) 331
Q15) A 4.0 kg mass is placed on a rough surface that makes an angle of 20° with
the horizontal. If the mass is on the verge of motion, then the coefficient of static
friction (µs) is
A) 0.36
B) 0.94
C) 0.87
D) 0.11
E) 0.34
Q16) A student moves 6 m along the positive x-direction, then he turns around
and moves 9 m along the
negative x-direction. His average velocity (in m/s) over the 7.0 s total interval of
motion is:
A) -3
B) 0.43
