Physics Chapter on Mechanics and Biophysics

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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?

Macroscopic mechanics Signup and view all the answers

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

Distance traveled under constant acceleration. Signup and view all the answers

What is the primary focus of biophysics?

Application of theories and methods of physics to understand biological systems Signup and view all the answers

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

The relationship between pressure and velocity in a flowing fluid Signup and view all the answers

What characterizes a complex system in biophysics?

It has relationships between its substructures Signup and view all the answers

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

Density, area and fluid velocity at point 1 Signup and view all the answers

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

R > 150 Signup and view all the answers

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

Disordered systems Signup and view all the answers

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

W = Fd cosΘ Signup and view all the answers

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

The flow of blood based on pressure difference and resistance Signup and view all the answers

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

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

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

The speed of fluid exiting a hole in a body Signup and view all the answers

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

Macroscopic properties Signup and view all the answers

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

It must define localizable systems without external influences. 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?

Reynold’s number Signup and view all the answers

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

Bernoulli's Principle Signup and view all the answers

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

-9.81 m/s² Signup and view all the answers

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

It remains at rest or continues in motion. Signup and view all the answers

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

T = r f sin Θ Signup and view all the answers

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

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

Which equation correctly describes power in terms of work?

P = W/t Signup and view all the answers

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

Standing wave Signup and view all the answers

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

By controlling the phase patterns of the acoustic waves Signup and view all the answers

Which of the following best describes acoustic impedance?

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

What is the primary function of a stethoscope?

To amplify and hear heart sounds Signup and view all the answers

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

Amplified sounds of the heartbeat Signup and view all the answers

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

It is a non-invasive, non-thermal method Signup and view all the answers

What role do air chambers in stethoscopes play?

They match impedance between skin and air Signup and view all the answers