Test Prep NET - Nurse Entrance Test Exam
Page: 3 / 45
Total 222 questions
Question #11 (Topic: Reading Comprehension)
The discoveries of the white dwarf, the neutron star, and the black hole, coming well after the discovery of the red giant are among eh most exciting developments
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
According to the passage, in the final stages of its development our own sun is likely to take the form of a
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
According to the passage, in the final stages of its development our own sun is likely to take the form of a
A. white dwarf
B. neutron star
C. red giant
D. gas of free neutrons
E. black hole
Answer: A
Question #12 (Topic: Reading Comprehension)
The discoveries of the white dwarf, the neutron star, and the black hole, coming well after the discovery of the red giant are among eh most exciting developments
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
According to the passage, an imbalance arises between nuclear radiation pressure and gravitational force in stars because
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
According to the passage, an imbalance arises between nuclear radiation pressure and gravitational force in stars because
A. the density of a star increases as it ages
B. radiation pressure increases as a star increases in mass
C. radiation pressure decreases when a star's fuel has been consumed
D. the collapse of a star increases its gravitational force.
E. a dense plasma decreases the star's gravitational force.
Answer: C
Question #13 (Topic: Reading Comprehension)
The discoveries of the white dwarf, the neutron star, and the black hole, coming well after the discovery of the red giant are among eh most exciting developments
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The author asserts that the discoveries of the white dwarf, the neutron star, and the black hole are significant because these discoveries.
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The author asserts that the discoveries of the white dwarf, the neutron star, and the black hole are significant because these discoveries.
A. demonstrate the probability of infinite density and infinitely small dimensions
B. pose the most comprehensive and fundamental problem faced by physicists in decades
C. clarify the paradox suggested by the collapse of electrons into atomic nuclei.
D. establish the relationship between the mass and gravitational pressure.
E. assist in establishing the age of the universe by tracing the life histories of stars.
Answer: B
Question #14 (Topic: Reading Comprehension)
The discoveries of the white dwarf, the neutron star, and the black hole, coming well after the discovery of the red giant are among eh most exciting developments
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The passage contains information that answers which of the following questions?
I. What is the density limit of the gravitational collapse of neutron stars?
II. At what point in its life cycle does a star begin to contract?
III. What resists the gravitational collapse of star?
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The passage contains information that answers which of the following questions?
I. What is the density limit of the gravitational collapse of neutron stars?
II. At what point in its life cycle does a star begin to contract?
III. What resists the gravitational collapse of star?
A. I only
B. III only
C. I and II only
D. II and III only
E. I, II and III
Answer: E
Question #15 (Topic: Reading Comprehension)
The discoveries of the white dwarf, the neutron star, and the black hole, coming well after the discovery of the red giant are among eh most exciting developments
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The author introduces the discussion of the paradox concerning atomic structures in order to
in decades because they may be well present physicists with their greatest challenge since the failure of classical mechanics. In the life cycle of the star, after all
of the hydrogen and helium fuel has been burned, the delicate balance between the outer nuclear radiations. Pressure and the stable gravitational force becomes
disturbed and slow contraction begins. As compression increases, a very dense plasma forms. If the initial star had mass of less than 1.4 solar masses (1.4 times
the mass of our sun), the process ceases at the density of 1,000 tons per cubic inch, and the star becomes the white dwarf. However, if the star was originally
more massive, the white dwarf plasma can’t resist the gravitations pressures, and in rapid collapse, all nuclei of the star are converted to a gas of free neutrons.
Gravitational attraction compresses this neutron gas rapidly until a density of 10 tons per cubic inch is reached; at this point the strong nuclear force resists further
contraction. If the mass of the star was between 1.4 and a few solar masses, the process stops here, and we have a neutron star. But if the original star was more
massive than a few solar masses, even the strong nuclear forces cannot resist the gravitational brunch. The neutrons are forced into one another to form heavier
hadrons and these in turn coalesce to form heavier entities, of which we as yet know nothing. At this point, a complete collapse of the stellar mass occurs; existing
theories predict a collapse to infinite density and infinitely small dimensions Well before this, however, the surface gravitational force would become so strong that
no signal could ever leave the star - any photon emitted would fall back under gravitational attraction â€" and the star would become black hole in space. This
gravitational collapse poses a fundamental challenge to physics. When the most widely accepted theories predict such improbable things as infinite density and
infinitely small dimensions, it simply means that we are missing some vital insight. This last happened in physics in the 1930’s, when we faced the fundamental
paradox concerning atomic structure. At that time, it was recognized that electrons moved in table orbits about nuclei in atoms. However, it was also recognized
that if charge is accelerated, as it must be to remain in orbit, it radiates energy; so, theoretically, the electron would be expected eventually to spiral into the
nucleus and destroy the atom. Studies centered around this paradox led to the development of quantum mechanics. It may well be that an equivalent t advance
awaits us in investigating the theoretical problems presented by the phenomenon of gravitational collapse.
The author introduces the discussion of the paradox concerning atomic structures in order to
A. Show why it was necessary to develop quantum mechanics
B. Compare the structure of an atom with the structure of star
C. Demonstrate by analogy that a vital insight in astrophysics is missing
D. illustrate the contention that improbable things do happen in astrophysics
E. Argue that atoms can collapse if their electrons do not remain in orbit.
Answer: C
