Biophysics Course Overview

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Questions and Answers

What branch of science uses the methods of physics to study biological processes?

Biology
Biophysics (correct)
Astrophysics
Chemistry

Which of the following chapters in the course covers the properties of light?

Chapter 1: Units, Statics Equilibrium and Torque
Chapter 4: Electromagnetic waves and general properties of light (correct)
Chapter 6: Electricity
Chapter 5: Optics and physics of the eye

How are physical quantities classified in the context of biophysics?

Scalar and Vector
Base and Derived (correct)
Static and Dynamic
Discrete and Continuous

What is the main goal of studying biophysics in medical and bioscience applications?

To understand how basic physics is related to biomedical applications (B) Signup and view all the answers

In the formula $v=at^2+bt^3$, if $t$ is measured in seconds, what does the variable $a$ represent?

Acceleration in m/s² (C) Signup and view all the answers

Which chapter covers fluid dynamics in the course?

Chapter 2: Fluid Statics, and Fluid Dynamics (C) Signup and view all the answers

What is described as like the bricks of a building in the classification of physical quantities?

Base quantities (B) Signup and view all the answers

What is the total duration allocated for studying the chapter on electricity?

One week (B) Signup and view all the answers

What is the unit of the spring force constant k in the SI system?

N/m (B) Signup and view all the answers

Which prefix represents one billionth of a meter?

nano (A) Signup and view all the answers

How is density defined mathematically?

D = m/V (B) Signup and view all the answers

What is Avogadro's number, representing the number of atoms or molecules in one mole of a substance?

6.02 × 10²³ (C) Signup and view all the answers

If a solid cube of aluminum has a volume of 0.2 cm³ and a density of 2.7 g/cm³, how many Al atoms are contained in the cube?

1.2 × 10²² (A) Signup and view all the answers

What is the mass of a single atom (ma) in grams if the atomic mass (A) is 27 g/mol?

4.49 × 10⁻²⁴ (D) Signup and view all the answers

What is the approximate density of the standard kilogram Platinum-Iridium cylinder?

21.461×10³ kg/m³ (A) Signup and view all the answers

What is the radius of the second sphere if its mass is five times greater than the first sphere with radius 4.50 cm?

7.69 cm (D) Signup and view all the answers

What is the formula for calculating density?

𝜌 = m/V (C) Signup and view all the answers

Which of the following represents the relation between Pascals and a force applied over an area?

P = F/A (D) Signup and view all the answers

If the air density in a room is 1.21 kg/m³ and the room dimensions are 3.5m x 4.2m x 2.4m, what is the total weight of the air?

420 N (B) Signup and view all the answers

How much force is exerted on a circular piston of radius 1.1 cm when a nurse applies a force of 42 N?

1.1 x 10^5 Pa (C) Signup and view all the answers

What is the unit conversion from 1 N/m² to dyne/cm²?

10 dyne/cm² (A) Signup and view all the answers

What is the downward force on the top of your head if the area is 0.040 m² under 1 atm pressure?

4.04 x 10^3 N (C) Signup and view all the answers

In a person of height 1.83 m, how is the hydrostatic difference in blood pressure calculated?

ΔP = ρgh (B) Signup and view all the answers

What is the weight of the water column exerted on an eardrum at a depth of 5.0 m with an area of 1 cm²?

5 N (B) Signup and view all the answers

What is the SI unit of viscosity?

Pa.s (D) Signup and view all the answers

According to Poiseuille's Law, what does viscosity (η) measure in a fluid?

The resistance to flow within the fluid (C) Signup and view all the answers

Which of the following statements is true regarding erythrocyte sedimentation rate (ESR) and viscosity?

Lower viscosity occurs with higher ESR. (C) Signup and view all the answers

What is the conversion from Fahrenheit to Celsius for a temperature of 98.6°F?

37°C (C) Signup and view all the answers

What is the temperature in Kelvin when converting 98.6°F to Celsius first and then to Kelvin?

310.15 K (B) Signup and view all the answers

Which of the following is NOT a heat source?

Solid objects in vacuum (D) Signup and view all the answers

Thermal equilibrium is achieved when:

Two objects are in thermal contact with no energy exchange. (C) Signup and view all the answers

The formula for calculating force (F) required for a constant speed (v) is:

F = ηvA/L (C) Signup and view all the answers

What is the equation for calculating flow rate Q?

$Q = \frac{V}{t}$ (A) Signup and view all the answers

What is indicated by the term 'wettability' in fluid dynamics?

The inclination of a liquid to spread on a surface (C) Signup and view all the answers

What happens to fluid speed as the radius of the tube decreases?

Fluid speed increases (A) Signup and view all the answers

How is Bernoulli’s equation expressed mathematically?

p + 2 \rho v^2 + \rho g h = constant (A) Signup and view all the answers

What is the primary feature of an ideal fluid as described in fluid dynamics?

It is non-viscous and incompressible (B) Signup and view all the answers

Using Bernoulli's equation, what happens to kinetic energy as fluid flows through a narrower section of a pipe?

Kinetic energy increases (A) Signup and view all the answers

In the context of fluid dynamics, what is capillary action primarily a result of?

Surface tension and adhesive forces (B) Signup and view all the answers

What does the equation $net F_{st} = 2 \pi r \gamma \cos \theta$ represent in fluid dynamics?

Net force due to surface tension (D) Signup and view all the answers

What characterizes forced convection?

It involves circulation by a blower or pump. (B) Signup and view all the answers

What is a characteristic of an ideal absorber?

It absorbs all energy incidents on it. (C) Signup and view all the answers

Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?

Charles's law (C) Signup and view all the answers

How is the ideal gas law expressed mathematically?

PV = nRT (C) Signup and view all the answers

What happens to the length of a steel railroad track segment when the temperature increases from 0.0°C to 40.0°C?

It expands linearly. (B) Signup and view all the answers

What is the value of the universal gas constant R in SI units?

8.315 J/mol·K (C) Signup and view all the answers

What describes natural convection?

Differences in density due to thermal expansion drive the flow. (A) Signup and view all the answers

What is true about an ideal gas?

Its behavior is approximated by the ideal gas law. (C) Signup and view all the answers

Flashcards

Biophysics

Using physics methods to study biological processes.

Base Quantity

Fundamental physical quantities like length, mass, time.