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AAMC Physics questions and answers graded A+ 2024/2025
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AAMC Physics questions and answers graded A+ 2024/2025
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AAMC PhysicsWhen an element undergoes β decay, a nuclear neutron is converted to a nuclear proton
because the nucleus emits an electron. What occurs to the atomic quantity and atomic mass of
an detail that undergoes β decay?
A. The atomic wide variety increases, but the atomic mass stays approximately the same.
B. The atomic wide variety remains the same, however the atomic mass decreases.
C. Both the atomic wide variety and the atomic mass decrease.
D. The atomic variety decreases, but the atomic mass remains about the equal. - ANSAnswer
Key: A
An electron has a terrible price and little or no mass as compared with the charge and mass of
nucleons. If an electron is emitted by way of a nucleus to stability the price, the nucleus have to
advantage one positive rate (a proton); as a result, the atomic variety (variety of protons in
nucleus) increases by way of one. However, the atomic mass is nearly unchanged because an
electron has most effective 0.05% of a proton's mass. Thus, A is the great answer.
If the second floor and the pinnacle floor of a constructing are separated via a distance of a
hundred m, what is the approximate distinction between the air pressures of the 2 ranges?
(Note: Air density = 1.2 kg/m3and gravitational acceleration = 10 m/s2. Neglect the
compressibility of air.)
A. 600 N/m2
B. 800 N/m2
C. One thousand N/m2
D. 1200 N/m2 - ANSAnswer Key: D Pressure is given by means of (density) • g • (height) if
density does now not change. This is about authentic for small atmospheric peak variations,
including a hundred m. The stress difference may be given by way of
(density) • g • (trade in peak)
or (1.2)(10)(100) = 1200 N/m2. Thus, D is the quality answer.
Si gadgets of N - ANS1 kg⋅m⋅s−2
In which of the following does sound journey maximum unexpectedly?
A.Air (zero°C)
B. Water (10°C)
C. Iron (20°C)
D. Sound travels at about the same pace in all the above. - ANSAnswer Key: C
The pace of sound is finest via a long way in a strong due to the sturdy intermolecular bonds
and near proximity of the molecules. Because the temperatures are close to each different (and
even want iron slightly), iron could have the highest sound velocity. Thus, C is the fine answer.
The nearer the molecules the easier it's far to vibrate and faster the wave movements
, What is the difference in stress between two points which are separated by means of a vertical
distance of zero.25 m in a tank of water? (Note: The density of water is 1,000 kg/m3, and g = 10
m/s2.)
A.250 N/m2
B.Four hundred N/m2
C.2,500 N/m2
D. Four,000 N/m2 - ANSAnswer Key: C
The difference in pressure in a fluid on Earth is:(density of fluid) × g × (trade in peak) = (a
thousand)(10)(zero.25) = 2500 N/m2. This is solution C.
D*g*h
In a nearsighted man or woman, the picture of item is targeted:
A. In front of the retina, requiring diverging lens correction.
B. In the front of the retina, requiring converging lens correction.
C. At the back of the retina, requiring diverging lens correction.
D. At the back of the retina, requiring converging lens correction. - ANSAnswer Key: A
A nearsighted (myopic) individual can recognition on nearby gadgets however can't simply see
objects far away. The nearsighted eye has a focal period this is shorter than it ought to be, so
the rays from a distant object shape a sharp image in front of the retina. This condition is
corrected by way of glasses with a diverging lens. Choice A is the appropriate answer.
Myopia (nearsightedness) - ANSthe focal point is in the front of the retina
corrected with a concave lens/diverging lens
Hyperopia (farsightedness) - ANSoccurs while the picture is focused behind the retina
Corrected with convex lens/converging lens
A battery in a circuit has an electromotive force given by means of ℰ and an internal resistance
of r. The battery affords a modern-day i to the circuit. What is the terminal voltage of the battery?
A. ℰ
B. ℰ - ir
C. ℰ + ir
D. ℰ + i2r - ANSAnswer Key: B The terminal voltage is the voltage furnished to the outside
additives of the circuit. The battery voltage ℰ will be reduced by way of the voltage required to
conquer the internal resistance, so
V = ℰ - ir. Thus, B is the nice answer.
Voltage equations - ANS
Voltage modern resistance equations - ANS
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