Physics Chapter 1 Quiz
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Questions and Answers

What is the standard of length based on?

  • The circumference of the Earth
  • The height of Mount Everest
  • The speed of light in vacuum (correct)
  • The distance traveled by a car in an hour

In mechanics, which three basic quantities can any physics quantity be expressed in terms of?

  • Distance, time, and energy
  • Volume, pressure, and temperature
  • Length, mass, and time (correct)
  • Force, mass, and velocity

Which of the following represents the unit of mass in mechanics?

  • V
  • M (correct)
  • L
  • T

What is the total mark value of the final exam in the evaluation criteria?

<p>50 Marks (D)</p> Signup and view all the answers

How long is the mid-term exam scheduled for in terms of weeks?

<p>1 Week (B)</p> Signup and view all the answers

Which textbook is listed as the primary material for the course?

<p>Physics for Scientists and Engineers (D)</p> Signup and view all the answers

How many weeks are dedicated to the topic of Statics and Torque?

<p>4 Weeks (A)</p> Signup and view all the answers

What is the mark value assigned to quizzes and assignments in the overall evaluation?

<p>10 Marks (B)</p> Signup and view all the answers

What is the dimension of the proportionality constant G in Newton's Law of universal gravitation?

<p>m³/(kg·s²) (B)</p> Signup and view all the answers

If a = kr^n*v^m, what is the value of n?

<p>-1 (C)</p> Signup and view all the answers

In the equation F = G(Mm/r²), what does r represent?

<p>Distance between the objects (B)</p> Signup and view all the answers

Which of the following equations is dimensionally correct?

<p>vf = vi + ax (B)</p> Signup and view all the answers

What is the derived SI unit for gravitational force F in the equation F = G(Mm/r²)?

<p>kg·m/s² (A)</p> Signup and view all the answers

In the expression a  r^n v^m, the total dimensional equation simplifies to which of the following forms?

<p>L^n T^-m (B)</p> Signup and view all the answers

What is the final expression for a after determining m and n?

<p>a = k r^-1 (B)</p> Signup and view all the answers

If the acceleration a is proportional to r^n and v^m, what does a represent?

<p>Acceleration (D)</p> Signup and view all the answers

What is the dimension of Kinetic Energy?

<p>ML2T-2 (C)</p> Signup and view all the answers

Which formula represents the distance traveled by a car under constant acceleration?

<p>x = ½ at2 (D)</p> Signup and view all the answers

In dimensional analysis, which of the following quantities is required to derive the formula for distance?

<p>Acceleration (B)</p> Signup and view all the answers

Which of the following is the dimension of Area?

<p>L2 (D)</p> Signup and view all the answers

What relationship does the dimension of Momentum have with mass and velocity?

<p>MLT-1 (D)</p> Signup and view all the answers

If the dimensions of velocity are LT-1, what are the dimensions of Acceleration?

<p>LT-2 (D)</p> Signup and view all the answers

Which statement about Potential Energy is true?

<p>P.E = Mgh (C)</p> Signup and view all the answers

In the dimensional analysis for deriving the distance traveled, what value is derived for n and m?

<p>n = 2, m = 1 (B)</p> Signup and view all the answers

What is the standard unit of mass in the International System (SI)?

<p>Kilogram (A)</p> Signup and view all the answers

What is the basis for the definition of the second since 1960?

<p>Radiation from the Cs137 atom (C)</p> Signup and view all the answers

Which of the following conversions is correct?

<p>1 inch = 2.54 cm (C)</p> Signup and view all the answers

What is the volume of a cube with each edge measuring 5.35 cm in SI units?

<p>1.53 x 10^-4 m³ (B)</p> Signup and view all the answers

How is density defined in relation to mass and volume?

<p>Density = Mass / Volume (B)</p> Signup and view all the answers

Which of the following is NOT a standard unit in the International System (SI)?

<p>Milligram (C)</p> Signup and view all the answers

What does dimensional analysis denote in physics?

<p>The physical nature of a quantity (C)</p> Signup and view all the answers

Which unit is used for measuring luminous intensity in the International System (SI)?

<p>Candela (D)</p> Signup and view all the answers

Flashcards

Dimensional Analysis

A method for checking if an equation is consistent in terms of units of measurement. Each term in an equation must have the same physical dimensions.

Newton's Law of Universal Gravitation

The force of attraction between two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Dimensional Consistency

The physical dimensions of all terms in an equation must match.

Gravitational Constant (G)

A proportionality constant in Newton's law of universal gravitation.

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SI units of Force

Kilograms times meters per second squared (kg⋅m/s²).

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SI units (International System of Units)

A standardized system of measurement used globally for scientific and engineering purposes.

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Proportionality Constant

A constant of proportionality that relates two quantities in a direct or inverse relationship.

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Dimensional Homogeneity

All terms in an equation must have the same dimensions.

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Physics Basic Quantities

Length, mass, and time are the fundamental quantities used to describe physical phenomena in mechanics. Units are assigned to measure them.

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Standard of length

The standard of length is defined by the distance light travels in a vacuum in a specific time, now defined as 1/299,792,458 of a second.

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Standard of mass

The standard of mass is a specific alloy, whose mass defines the standard unit of mass.

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Meter (unit)

The SI unit of length, defined as the distance light travels in vacuum for 1/299,792,458 of a second.

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Dimensional Analysis

A method used to check the consistency of equations using the basic dimensions (length, mass, time).

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Conversion of units

Changing the unit of measurement of a physical quantity without changing the quantity itself.

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Physics & Measurement

The first topic in the physics curriculum, covering fundamental concepts and units of measurement for physical quantities.

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Week 1-2

Introduction to the study of physics with emphasis on measurement.

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Kilogram (kg)

The SI unit of mass, defined as the mass of a platinum-iridium alloy cylinder.

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Second (s)

The SI unit of time, based on the characteristic frequency of radiation from a Cesium-137 atom.

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SI units

International System of Units, a standardized system of measurement.

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Conversion of Units

Changing units of measurement from one system to another.

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Density

Mass per unit volume.

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Dimensional Analysis

A method to check the consistency of equations using the dimensions of physical quantities.

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Meter (m)

The SI unit of length

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CGS

A system of units used in science.

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Dimension of Area

Area is measured in length squared (L²).

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Dimension of Velocity

Velocity is length per unit time (LT⁻¹).

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Dimension of Acceleration

Acceleration is change in velocity per unit time (LT⁻²).

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Dimensional Analysis

Checking the validity of physical formulas by ensuring that units on both sides are the same.

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Deriving Formulas

Using dimensional analysis to determine how various factors affect a formula, and finding the unknown variables involved.

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Dimensional Homogeneity

Physical quantities in an equation must have the same dimensions.

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Constant Acceleration

Acceleration remains constant over time for an object.

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Power Law Derivation

Determining the relationship between variables based on their proportionality and units in a physical situation.

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Study Notes

Course Information

  • Course title: Physics (F/R-001)
  • Instructor: Dr. Mohaned Mohmmed
  • Institution: Badr University, Assiut
  • Lectures: Face-to-face
  • Textbooks:
    • Physics for Scientists and Engineers, R.A. Serway and J.W. Jewett, 8th Edition, Thomson Books/Cole 2013
    • College Physics, PAUL PETER URONE, ROGER HINRICHS, OpenStax

Evaluation

  • Mid-term exam: 10 Marks
  • Quizzes/ assignments: 10 Marks
  • Practical exam: 20 Marks
  • Oral exam: 10 Marks
  • Final exam: 50 Marks

Course Topics & Timeline

  • Chapter 1: Physics and Measurement (2 weeks)
  • Chapter 2: Statics and Torque (4 weeks)
  • Mid-term Exam (1 week)
  • Chapter 3: Fluid Statics (2 weeks)
  • Chapter 4: Fluid Dynamics and its Biological and Medical Applications (2 weeks)
  • Chapter 5: Physics of Hearing (2 weeks)
  • Final Exam

Chapter 1: Physics and Measurement

  • Topics:
    • Standards of length, mass, and time
    • Conversion of units
    • Dimensional Analysis

1. Standards of Length, Mass, and Time

  • Length: Based on the speed of light in vacuum
    • Meter: Distance light travels in vacuum in 1/299,792,458 sec
  • Mass: Based on the mass of a platinum-iridium (Pt-Ir) alloy cylinder
    • Kilogram: Mass of a Pt-Ir alloy cylinder
  • Time: Based on the atomic clock
    • Second: Based on the characteristic frequency of radiation from the Cs-137 atom (9,192,631,770 oscillations)

International System (SI) of Units

  • Established in 1960
  • Mechanics:
    • Length: Meter (m)
    • Mass: Kilogram (kg)
    • Time: Second (s)
  • Other quantities:
    • Electric current: Ampere (A)
    • Temperature: Kelvin (K)
    • Luminous intensity: Candela (cd)
    • Amount of substance: Mole (mol)

2. Conversion of Units

  • Used to convert units from one system (e.g., cgs, mks, British) to another
  • Examples provided for converting between inches, feet, miles, meters, centimeters, grams and kilograms

3. Dimensional Analysis

  • Method for checking and deriving formulas
  • Dimensions of basic quantities:
    • Length (L)
    • Mass (M)
    • Time (T)
  • Dimension of physical quantities can be expressed in terms of L, M, and T
  • Examples of applying dimensional analysis provided showing how to check the validity of equations and derive some formulae

Quick Quizzes and Answers

  • Quick Quizzes related to different topics
  • Answers given for each quick quiz

Homework Problems

  • Problems related to dimensional analysis and Newton's Law of universal gravitation.

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Physics Chapter 1 PDF

Description

Test your knowledge on the fundamentals of physics measurement in this quiz on Chapter 1. Explore topics such as standards of length, mass, time, unit conversions, and dimensional analysis. Challenge yourself and reinforce your understanding of these essential concepts.

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