Physics Chapter on Mechanics and Biophysics
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Questions and Answers

What is a key characteristic of a vector?

  • It cannot be represented graphically.
  • It is always positive.
  • It has only magnitude.
  • It has both magnitude and direction. (correct)

    • Which equation is correctly formulated for calculating the final velocity given initial velocity, acceleration, and time?

  • vf = 1/2at2
  • vf = vo - at
  • vf = vo + at (correct)
  • vf2 = vo + 2aΔx

    • In solving projectile motion problems, what should be done first?

  • Determine the initial velocity.
  • Draw the free body diagram. (correct)
  • Identify the type of projectile motion problem.
  • Calculate the projectile's range.

    • Which of the following fields of mechanics deals with both electrical and gravitational forces?

    <p>Macroscopic mechanics</p> Signup and view all the answers

    What does the equation Δx = vot + 1/2at2 calculate?

    <p>Distance traveled under constant acceleration.</p> Signup and view all the answers

    What is the primary focus of biophysics?

    <p>Application of theories and methods of physics to understand biological systems</p> Signup and view all the answers

    What does Bernoulli's Principle help to determine in fluid dynamics?

    <p>The relationship between pressure and velocity in a flowing fluid</p> Signup and view all the answers

    What characterizes a complex system in biophysics?

    <p>It has relationships between its substructures</p> Signup and view all the answers

    In the Continuity Equation, what does the term p1A1v1 represent?

    <p>Density, area and fluid velocity at point 1</p> Signup and view all the answers

    What condition indicates a turbulent flow using Reynold’s Number?

    <p>R &gt; 150</p> Signup and view all the answers

    What type of system requires a large amount of information to specify its dynamics?

    <p>Disordered systems</p> Signup and view all the answers

    Which equation represents the work done when a force is applied at an angle?

    <p>W = Fd cosΘ</p> Signup and view all the answers

    What does the formula F = ΔP/R represent in the context of blood flow?

    <p>The flow of blood based on pressure difference and resistance</p> Signup and view all the answers

    Which of the following statements about models in biophysics is correct?

    <p>Models need to be clear and consistent for accurate predictions.</p> Signup and view all the answers

    What does the equation sqrt(2𝑔∆ℎ) calculate?

    <p>The speed of fluid exiting a hole in a body</p> Signup and view all the answers

    What was the historical focus of biophysical studies before it shifted to molecular levels?

    <p>Macroscopic properties</p> Signup and view all the answers

    What is essential for a model to be effective in studying biophysical principles?

    <p>It must define localizable systems without external influences.</p> Signup and view all the answers

    Which term describes the ratio of a characteristic convective inertial momentum to the impulse of the body due to viscous force?

    <p>Reynold’s number</p> Signup and view all the answers

    Which principle states that the pressure in a fluid decreases as the fluid's velocity increases?

    <p>Bernoulli's Principle</p> Signup and view all the answers

    What value does the vertical acceleration (Ay) have in projectile motion?

    <p>-9.81 m/s²</p> Signup and view all the answers

    In Newton's first law, what happens to an object when forces are balanced?

    <p>It remains at rest or continues in motion.</p> Signup and view all the answers

    What is the equation that describes the torque produced by a force acting on an object?

    <p>T = r f sin Θ</p> Signup and view all the answers

    What is the relationship described by Newton's third law?

    <p>For every action, there is an equal and opposite reaction.</p> Signup and view all the answers

    Which equation correctly describes power in terms of work?

    <p>P = W/t</p> Signup and view all the answers

    What method is used in acoustic tweezers to manipulate bioparticles using resonance patterns?

    <p>Standing wave</p> Signup and view all the answers

    How do traveling wave acoustic tweezers achieve manipulation in three-dimensional space?

    <p>By controlling the phase patterns of the acoustic waves</p> Signup and view all the answers

    Which of the following best describes acoustic impedance?

    <p>Degree at which a material resists transfer in sound energy</p> Signup and view all the answers

    What is the primary function of a stethoscope?

    <p>To amplify and hear heart sounds</p> Signup and view all the answers

    What type of recording does a phonocardiogram (PCG) provide?

    <p>Amplified sounds of the heartbeat</p> Signup and view all the answers

    What unique characteristic of histotripsy makes it suitable for cancer treatment?

    <p>It is a non-invasive, non-thermal method</p> Signup and view all the answers

    What role do air chambers in stethoscopes play?

    <p>They match impedance between skin and air</p> Signup and view all the answers

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