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We offer the latest MCAT practice test designed for free and effective online Medical College Admission Test: Verbal Reasoning, Biological Sciences, Physical Sciences, Writing Sample certification preparation. It's a simulation of the real MCAT exam experience, built to help you understand the structure, complexity, and topics you'll face on exam day.

Exam Code: MCAT
Exam Questions: 815
Medical College Admission Test: Verbal Reasoning, Biological Sciences, Physical Sciences, Writing Sample
Updated: 27 Aug, 2025
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Question 1

Ink jet printers produce high resolution output, at a lower cost than laser printers, by generating charged ink
droplets which are then deflected onto a sheet of paper by an electric field. Each droplet deflected by the field
strikes the paper and forms a tiny dot of ink. While a typical printed letter requires about 100 drops, an ink jet
printer is able to produce drops at a rate of 100,000 per second.
The essential elements of the ink jet printer head are shown in Figure 1. The drop generator produces the ink
droplets, each with a mass of approximately 1.2 × 10−10 kg and a diameter of approximately 30 μm. The drops
then enter a highly precise charging unit which controls the charge q on each droplet to within 2%, with typical
charges for drops generated by various ink jet printers ranging from −1.0 × 10−13 C to −3.0 × 10−14 C. The
charged droplets are subsequently passed through the deflecting plates between which a variable electric field
is generated. The electronically controlled electric field between the plates is typically varied over a range from
1.0 × 106 N/C to 5.4 × 106 N/C, and is used to aim the ink droplet at the paper. 
MCAT-part-3-page300-image59
MCAT-part-3-page300-image58
An ink jet printer deflects a particular ink droplet by 1.5 mm in the region of the deflector. Which of the following
is a possible value of the work done on the droplet?

Section: Physical Sciences 

Options :
Answer: C

Question 2

Which of these is NOT true about ultrasound waves?


Section: Physical Sciences 

Options :
Answer: B

Question 3

The rich analyses of Fernand Braudel and his fellow Annales historians have made significant contributions to
historical theory and research. In a departure from traditional historical approaches, the Annales historians,
assume (as do Marxists) that history cannot be limited to a simple recounting of conscious human actions, but
must be understood in the context of forces and material conditions that underlie human behavior. Braudel was
the first Annales historian to gain widespread support of the idea that history should synthesize data from
various social sciences, especially economics, in order to provide a broader view of human societies over time
(although Febvre and Bloch, founders of the Annales school, had originated this approach).
Braudel conceived of history as the dynamic interaction of three temporalities. The first of these, the
evenementielle, involved short-lived dramatic “events,” such as battles, revolutions and the actions of great
men, which had preoccupied traditional historians like Carlyle. Conjonctures was Braudel’s term for larger
cyclical processes that might last up to half a century. The longue duree, a historical wave of great length, was
for Braudel the most fascinating of the three temporalities. Here he focused on those aspects of everyday life
that might remain relatively unchanged for centuries. What people ate, what they wore, their means and routes
of travel – for Braudel these things create “structures” which define the limits of potential social change for
hundreds of years at a time.
Braudel’s concept of the longue duree extended the perspective of historical space as well as time. Until the
Annales school, historians had taken the juridical political unit the nation-state, duchy, or whatever as their
starting point. Yet, when such enormous timespans are considered, geographical features may well have more
significance for human populations than national borders. In his doctoral thesis, a seminal work on the
Mediterranean during the reign of Philip II, Braudel treated the geohistory of the entire region as a “structure”
that had exerted myriad influences on human lifeways since the first settlements on the shores of the
Mediterranean Sea. And so the reader is given such arcane information as the list of products that came to
Spanish shores from North Africa, the seasonal routes followed by Mediterranean sheep and their shepherds,
and the cities where the best ship timber could be bought.
Braudel has been faulted for the imprecision of his approach. With his Rabelaisian delight in concrete detail,
Braudel vastly extended the realm of relevant phenomena; but this very achievement made it difficult to delimit
the boundaries of observation, a task necessary to beginning any social investigation. Further, Braudel and
other Annales historians minimize the differences among the social sciences. Nevertheless, the many similarlydesigned studies aimed at both professional and popular audiences indicate that Braudel asked significant
questions which traditional historians had overlooked.
In the third paragraph, the author is primarily concerned with discussing:

Section: Verbal Reasoning  

Options :
Answer: B

Question 4

Although nihilism is commonly defined as a form of extremist political thought, the term has a broader meaning.
Nihilism is in fact a complex intellectual stance with venerable roots in the history of ideas, which forms the
theoretical basis for many positive assertions of modern thought. Its essence is the systematic negation of all
perceptual orders and assumptions. A complete view must account for the influence of two historical
crosscurrents: philosophical skepticism about the ultimacy of any truth, and the mystical quest for that same
pure truth. These are united by their categorical rejection of the “known”.
The outstanding representative of the former current, David Hume (1711-1776), maintained that external reality
is unknowable, since sense impressions are actually part of the contents of the mind. Their presumed
correspondence to external “things” cannot be verified, since it can be checked only by other sense
impressions. Hume further asserts that all abstract conceptions turn out, on examination, to be generalizations
from sense impressions. He concludes that even such an apparently objective phenomenon as a cause-andeffect relationship between events may be no more than a subjective fabrication of the observer. Stanley Rosen
notes: “Hume terminates in skepticism because he finds nothing within the subject but individual impressions
and ideas.”
For mystics of every faith, the “experience of nothingness” is the goal of spiritual practice. Buddhist meditation
techniques involve the systematic negation of all spiritual and intellectual constructs to make way for the
apprehension of pure truth. St. John of the Cross similarly rejected every physical and mental symbolization of
God as illusory. St. John’s spiritual legacy is, as Michael Novak puts it, “the constant return to inner solitude, an
unbroken awareness of the emptiness at the heart of consciousness. It is a harsh refusal to allow idols to be
placed in the sanctuary. It requires also a scorching gaze upon all the bureaucracies, institutions, manipulators,
and hucksters who employ technology and its supposed realities to bewitch and bedazzle the psyche.”
Novak’s interpretation points to the way these philosophical and mystical traditions prepared the ground for the
political nihilism of the nineteenth and twentieth centuries. The rejection of existing social institutions and their
claims to authority is in the most basic sense made possible by Humean skepticism. The political nihilism of the
Russian intelligentsia combined this radical skepticism with a near mystical faith in the power of a new
beginning. Hence, their desire to destroy becomes a revolutionary affirmation; in the words of Stanley Rosen,
“Nihilism is an attempt to overcome or repudiate the past on behalf of an unknown and unknowable, yet hopedfor, future.” This fusion of skepticism and mystical re-creation can be traced in contemporary thought, for
example as an element in the counterculture of the 1960s.
The passage implies that the two strands of nihilist thought

Section: Verbal Reasoning 

Options :
Answer: A

Question 5

One of the most common methods that scientists use to determine the age of fossils is known as carbon
dating. 14C is an unstable isotope of carbon that undergoes beta decay with a half-life of approximately 5,730
years. Beta decay occurs when a neutron in the nucleus decays to form a proton and an electron which is
ejected from the nucleus.
14C is generated in the upper atmosphere when 14N, the most common isotope of nitrogen, is bombarded by
neutrons. This mechanism yields a global production rate of 7.5 kg per year of 14C, which combines with
oxygen in the atmosphere to produce carbon dioxide. Both the production and the decay of 14C occur
simultaneously. This process continues for many half-lives of 14C, until the total amount of 14C approaches a
constant.
A fixed fraction of the carbon ingested by all living organisms will be 14C. Therefore, as long as an organism is
alive, the ratio of 14C to 12C that it contains is constant. After the organism dies, no new 14C is ingested, and
the amount of 14C contained in the organism will decrease by beta decay. The amount of 14C that must have
been present in the organism when it died can be calculated from the amount of 12C present in a fossil. By
comparing the amount of 14C in the fossil to the calculated amount of 14C that was present in the organism
when it died, the age of the fossil can be determined.
If the global production rate of 14C were to increase to 10 kg per year:

Section: Physical Sciences 

Options :
Answer: A

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