Via Afrika Grade 10 Physical Sciences
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Questions and Answers

What does Adam Joseph feel when his learners perform well?

  • Angry
  • Fearful
  • Sorrowful
  • Glad and great (correct)

    • Who are the authors of the Via Afrika Physical Sciences study guide?

  • Via Afrika, D.B.Gibbon, R.Jones
  • Adam Joseph, D.B.Gibbon, R.Jones
  • D.B.Gibbon, R.Jones, J.E.Patrick, M.Patrick, S.T.Townsend, T.van Niekerk, T.E.Luvhimbi, N.P.Mlobeli (correct)
  • Adam Joseph, Via Afrika, J.E.Patrick

    • What is the purpose of the possible work schedule included in the course?

  • To make the course more difficult
  • To align with CAPS requirements
  • To save teachers time and make their lives easier (correct)
  • To confuse the teachers

    • Why does Via Afrika appreciate the role of teachers?

    <p>Because they have the most important job in education</p> Signup and view all the answers

    What is the significance of page 39 in the course?

    <p>It shows how CAPS requirements are met</p> Signup and view all the answers

    Who is the teacher being quoted in the passage?

    <p>Adam Joseph</p> Signup and view all the answers

    What does Via Afrika aim to do for teachers?

    <p>Save them time and make their lives easier</p> Signup and view all the answers

    What is the name of the publisher of the Physical Sciences study guide?

    <p>Via Afrika</p> Signup and view all the answers

    What is the relationship between the frequency and the period of a wave?

    <p>f = 1/T</p> Signup and view all the answers

    What is the wavelength of the transverse wave in the worked example?

    <p>540 mm</p> Signup and view all the answers

    What is the result of crest meeting crest in superposition of pulses?

    <p>Constructive interference</p> Signup and view all the answers

    What is the amplitude of a longitudinal pulse?

    <p>The maximum displacement from the position of rest of a particle</p> Signup and view all the answers

    What is the speed of the wave in the worked example?

    <p>0.675 m/s</p> Signup and view all the answers

    What is the condition for two pulses to cancel out to produce zero amplitude?

    <p>All of the above</p> Signup and view all the answers

    What is a longitudinal pulse?

    <p>A single disturbance in a medium that is either a compression or a rarefaction</p> Signup and view all the answers

    What is the result of trough meeting trough in superposition of pulses?

    <p>Constructive interference</p> Signup and view all the answers

    What is the purpose of assuming an answer to a question in an exam?

    <p>To proceed with the next question and perform calculations</p> Signup and view all the answers

    What is the primary goal of the summaries in the study guide?

    <p>To provide a brief overview of the essential information</p> Signup and view all the answers

    How should you approach a question where you have no idea how to answer it?

    <p>Assume an answer and proceed with the next question</p> Signup and view all the answers

    What is the purpose of the prefixes and units table in the study guide?

    <p>To assist learners in converting between units</p> Signup and view all the answers

    Why should you not try to memorize the summaries without understanding them?

    <p>Because memorization without understanding will not help in applying the concepts</p> Signup and view all the answers

    What is the benefit of writing down the key words from the summary?

    <p>To help learners remember the key concepts</p> Signup and view all the answers

    Why are the sample Physics and Chemistry examinations provided at the end of the book?

    <p>To give learners an idea of what to expect in the final exam</p> Signup and view all the answers

    What is the purpose of the marks allocation provided with the answers in the study guide?

    <p>To provide learners with an idea of how marks are allocated in an exam</p> Signup and view all the answers

    What is the phenomenon in the ripple tank shown in the photograph?

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

    What do the fan-shaped lines in the ripple tank represent?

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

    What type of wave is a sound wave that reaches your ear?

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

    What is the wavelength of a sound wave with a frequency of 500 Hz and a speed of 340 m/s?

    <p>0.68 m</p> Signup and view all the answers

    Why is the moon sometimes referred to as 'the silent planet'?

    <p>Because it has no atmosphere</p> Signup and view all the answers

    What is the speed of sound in air?

    <p>340 m/s</p> Signup and view all the answers

    What is the frequency of yellow light?

    <p>5 × 10^14 Hz</p> Signup and view all the answers

    What is the wavelength of yellow light in nanometers?

    <p>580 nm</p> Signup and view all the answers

    What should you do if you are unsure of an answer to a multiple-choice question?

    <p>Eliminate some choices that you think are definitely wrong and then guess</p> Signup and view all the answers

    What is the first step in answering a calculation question?

    <p>Write the relevant equation for the calculation</p> Signup and view all the answers

    What happens if you do not state the formula before doing a calculation?

    <p>You will get no marks, even if your answer is correct</p> Signup and view all the answers

    What system of units is used in Physical Science?

    <p>SI system</p> Signup and view all the answers

    What is the mark allocation for a calculation question?

    <p>One mark for the equation, one mark for each correct substitution, and one mark for the answer</p> Signup and view all the answers

    What should you do if you are given a value in another unit?

    <p>Convert the value into the relevant SI unit before using it in the calculation</p> Signup and view all the answers

    What is the correct way to write your final answer?

    <p>Write the answer with the correct SI unit</p> Signup and view all the answers

    What should you do if you are running out of time and have not finished the examination?

    <p>Go back to the questions that you marked and try to answer them</p> Signup and view all the answers

    Study Notes

    Tips for Teachers and Learners

    • Via Afrika values and supports teachers' roles, providing resources to save time and make teaching easier.
    • The series is aligned with CAPS, with a possible work schedule and assistance for successful teaching.

    Studying and Examination Techniques

    • A possible work schedule has been included to assist learners.
    • Eliminate choices and guess if unsure, but commit to an answer and mark it for review later.
    • Calculations require stating the principle, law, or equation first, then substituting values in SI units.
    • Write the correct SI unit with the final answer, and include direction for vector quantities.
    • Marks are allocated for the equation, correct substitutions, calculated answer, and direction.
    • Positive marking allows for correct calculations despite incorrect initial answers.

    Using the Study Guide

    • Each topic is presented as a summary followed by examination-type questions.
    • Summaries are the "bare bones" of what learners need to know, but they must understand each statement.
    • Learners should write down key words, test themselves, and then work through the questions.
    • A full sample Physics examination and a full sample Chemistry examination are provided.

    Physical Science Basics

    • Prefixes are used in Physical Science, with examples provided in a table.
    • The wave equation is v = fλ, with f = 1/T, and v = λ/T.
    • Superposition is the addition of amplitudes of two pulses occupying the same space, resulting in constructive or destructive interference.

    Longitudinal Waves and Sound

    • A pulse is a single disturbance in a medium, with amplitude as the maximum displacement from rest position.
    • Longitudinal pulses and waves have compressions and rarefactions.
    • Sound waves are a type of wave that reaches the ear, demonstrated using a slinky spring.
    • Wavelength is the distance between two consecutive points in a wave that are in phase.

    Questions and Answers

    • The phenomenon in the ripple tank is called superposition, with fan-shaped lines representing the resulting wave pattern.
    • Sound waves have a frequency of around 500 Hz, with a wavelength calculated using v = fλ.
    • Yellow light has a frequency of around 5 × 1014 Hz, with a wavelength calculated using v = fλ, and expressed in nanometres.
    • Sound cannot travel in a vacuum, and the moon is referred to as "the silent planet" due to this.
    • The speed of sound in air is 340 m/s, with wavelength and period calculated for a tuning fork of frequency 156 Hz.

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