مادة الفيزياء الحيوية - الأبعاد والوحدات
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Questions and Answers

يمكن التعبير عن الكمية الأساسية بدلالة كميات أساسية أخرى.

False

ما هي الكميات الأساسية ؟ (اختر جميع الخيارات الصحيحة)

  • السرعة
  • الزمن (correct)
  • الكتلة (correct)
  • القوة (correct)
  • العجلة
  • الطول (correct)
  • ما هي الكمية التي يمكن التعبير عنها بدلالة كميات أساسية أخرى؟

    الكمية المشتقة

    ما هي الكمية التي يتم تحديدها فقط من خلال مقدارها ؟

    <p>السرعة</p> Signup and view all the answers

    الكمية المتجهة هي الكمية التي يتم تحديدها فقط عن طريق المقدار.

    <p>False</p> Signup and view all the answers

    تُعرف [blank] بأنها الطبيعة الفيزيائية للكمية.

    <p>البعد</p> Signup and view all the answers

    تُعرف ______ بأنها المعيار لقياس البعد.

    <p>الوحدة</p> Signup and view all the answers

    السرعة و القوة و العجلة و الضغط و الكتلة و الطول و الزمن هي جميعها كميات متجهة .

    <p>False</p> Signup and view all the answers

    ما هي وحدات النظام الدولي للوحدات SI للطول و الكتلة و الزمن ؟

    <p>المتر - الكيلوجرام - الثانية</p> Signup and view all the answers

    (10 m / s ) ما هي قيمة 10 متر في الثواني عندما تُحول إلى km / h؟

    <p>36 كم / ساعة</p> Signup and view all the answers

    ما هو بعد الكتلة ؟

    <p>M</p> Signup and view all the answers

    ما هو بعد السرعة؟

    <p>LT⁻¹</p> Signup and view all the answers

    ما هو بعد الشغل ؟

    <p>ML²T⁻²</p> Signup and view all the answers

    Study Notes

    Biophysics Course - Dimension & Units

    • This is a biophysics lab for PTBA 1105, first level, fall semester 2024-2025.
    • Physical quantities can be classified as basic or derived, and further categorized as scalar or vector.
    • Basic quantities cannot be expressed in terms of other quantities.
    • Examples of basic quantities: Length, Mass, Time, Current, Luminous intensity, Amount of substance, and Temperature (abbreviated as L, M, T, I, J, N, θ).

    Basic Definitions

    • A basic quantity is a physical quantity that cannot be defined or expressed in terms of other quantities.
    • Length, Mass, and Time are the three basic quantities.
    • There are four additional basic quantities: Current, Luminous intensity, Amount of substance, and Temperature.

    Derived Quantities

    • A derived quantity is a physical quantity that can be defined or expressed in terms of two or more basic quantities.
    • Examples of derived quantities: Velocity, acceleration, force, and pressure.

    Scalar Quantities

    • Scalar quantities are defined only by their magnitude (size).
    • Examples include price, age, speed, distance, and the area and volume for a shape.

    Vector Quantities

    • Vector quantities are defined not only by their magnitude (size) but also by their direction.
    • Examples include force, velocity, displacement, and the acceleration of shapes.

    Dimension vs. Unit

    • Dimension describes the physical nature of a quantity (like length, mass, time).
    • Unit is the standard used to measure a dimension, giving it a numerical value.
    • Examples: Length dimension is [L], and a length unit can be measured in meters (m) or kilometers (km).

    SI Base Quantities and Units

    • Length: Meter (m)
    • Mass: Kilogram (kg)
    • Time: Second (s)
    • Electric Current: Ampere (A)
    • Temperature: Kelvin (K)
    • Amount of substance: Mole (mol)
    • Luminous intensity: Candela (cd)

    Basic Quantities and their Dimensions

    • A table listing the names, SI units, and dimensions of the seven basic quantities (length, time, mass, electric current, temperature, amount of substance, and luminous intensity)

    System of Units

    • Different systems of units exist (e.g., FPS, CGS, MKS).
    • Each system defines length, mass, and time units differently.

    Area and Volume

    • Area is calculated by multiplying length by width.
    • Volume is calculated by multiplying length, width, and height.

    Dimension and Units of Basic and Derived Quantities

    • A table displaying the formulas, dimensions, MKS units, and CGS units for various quantities (mass, length, time, area, volume, velocity, acceleration, force, pressure, and others).

    Dimensional Analysis

    • A method for checking the validity of physical equations by comparing the dimensions of the left and right sides of the equation.

    Conversions Between Units

    • Methods for converting between different systems of units(Example: converting Newton to Dyne).

    Ratio, Rate, and Gradient

    • Ratio compares a quantity to itself.
    • Rate is the change of a quantity with respect to time.
    • Gradient is the change of a quantity with respect to distance.

    Refractive Index

    • Refractive index is the ratio of the speed of light in a vacuum to the speed of light in a medium.
    • It has no dimensions and no units.

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    Description

    هذا الاختبار يتعلق بمادة الفيزياء الحيوية لطلاب PTBA 1105 في الفصل الدراسي الخريفي 2024-2025. سيتناول الاختبار تعريف الكميات الأساسية والمشتقة مع أمثلة متنوعة. سيشمل اختبارات حول الكميات العددية والمتجهة وكيفية تصنيفها.

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