Apply General Science Concepts - Air Force Officer Qualifying Test AFOQT

1. What is the SI unit of force, defined as $1\ \text{kg}\cdot\text{m}\cdot\text{s}^{-2}$?

   Newton (N). The Newton is defined as the force required to accelerate a 1 kg mass at 1 m/s², serving as the standard unit in the International System of Units.

2. Identify the wave relationship between speed, frequency, and wavelength.

   $v=f\lambda$. Wave speed is determined by the product of frequency and wavelength in any medium.

3. What process converts glucose and oxygen into ATP, carbon dioxide, and water in cells?

   Aerobic cellular respiration. This oxygen-dependent process efficiently produces ATP through glycolysis, the Krebs cycle, and electron transport chain.

4. State the formula for Newton's second law relating net force, mass, and acceleration.

   $F=ma$. Newton's second law quantifies the relationship where net force equals mass multiplied by acceleration.

5. What is the relationship between work, force, and distance when force is parallel to motion?

   $W=Fd$. Work equals the product of force and displacement when the force is applied in the direction of motion.

6. What type of chemical bond involves the sharing of electron pairs between atoms?

   Covalent bond. Covalent bonds form when atoms share valence electrons to achieve stable electron configurations.

7. What organelle is the primary site of ATP production in eukaryotic cells?

   Mitochondrion. Mitochondria perform oxidative phosphorylation to generate ATP, functioning as the cell's energy powerhouse.

8. State the formula for density in terms of mass and volume.

   $\rho=\frac{m}{V}$. Density represents mass per unit volume, indicating how compact a substance is.

9. What is the formula for weight near Earth in terms of mass and gravitational acceleration?

   $W=mg$. Weight represents the gravitational force on an object, calculated as mass times the acceleration due to gravity.

10. Which subatomic particle determines an element's atomic number?

    Proton. The atomic number equals the number of protons in an atom's nucleus, defining the element's identity.

11. State the formula for kinetic energy of a mass $m$ moving at speed $v$.

    $KE=\frac{1}{2}mv^2$. Kinetic energy quantifies the energy of motion, derived from one-half the product of mass and velocity squared.

12. Identify the general direction of electron flow in an ionic bond between a metal and a nonmetal.

    Electrons transfer from metal to nonmetal. In ionic bonding, metals lose electrons to become cations, while nonmetals gain them to form anions, creating electrostatic attraction.

13. State the formula for gravitational potential energy near Earth for mass $m$ at height $h$.

    $PE=mgh$. Gravitational potential energy measures stored energy based on an object's mass, height, and gravitational acceleration.

14. Which electromagnetic wave has the highest frequency: radio, microwave, infrared, visible, UV, X-ray, or gamma?

    Gamma rays. Gamma rays occupy the highest frequency end of the electromagnetic spectrum, with the shortest wavelengths and highest energy.

15. What is the basic unit of heredity that codes for a trait?

    Gene. Genes consist of DNA segments that encode instructions for protein synthesis, determining inherited characteristics.

16. What is the formula for pressure in terms of force applied over area?

    $P=\frac{F}{A}$. Pressure is the force distributed over a given area, fundamental in fluid mechanics and material science.

17. State Ohm's law relating voltage, current, and resistance.

    $V=IR$. Ohm's law describes the linear relationship between voltage across a conductor and the current through it, proportional to resistance.

18. State the formula for power in terms of work done over time.

    $P=\frac{W}{t}$. Power measures the rate of work done, calculated as work divided by the time interval.

19. What is the pH of a neutral aqueous solution at $25\ ^\circ\text{C}$?

    $7$. Neutral solutions have equal hydrogen and hydroxide ion concentrations, resulting in a pH of 7 at standard temperature.

20. What layer of Earth is liquid and responsible for generating most of Earth's magnetic field?

    Outer core. The liquid outer core, composed of molten iron and nickel, generates Earth's magnetic field through convective currents.

21. Identify the acceleration due to gravity near Earth's surface used in basic calculations.

    $g\approx 9.8\ \text{m}\cdot\text{s}^{-2}$. This value approximates the constant downward acceleration of objects in free fall near Earth's surface due to gravity.

22. What is the electric power formula in terms of voltage and current?

    $P=VI$. Electric power is the product of voltage and current, representing the rate of electrical energy transfer.

23. Which gas is most abundant in Earth's atmosphere by volume?

    Nitrogen. Nitrogen comprises approximately 78% of the atmosphere, essential for air composition and the nitrogen cycle.

24. Which nucleic acid contains uracil and is typically single-stranded?

    RNA. RNA uses uracil instead of thymine and is usually single-stranded, enabling roles in transcription and translation.

25. Which type of plate boundary most directly produces new oceanic crust at mid-ocean ridges?

    Divergent plate boundary. At divergent boundaries, tectonic plates separate, allowing magma to rise and solidify into new oceanic crust.

Study these flashcards