𝐒𝐂𝐈𝐄𝐍𝐂𝐄 𝐒𝐏𝐄𝐂𝐓𝐑𝐔𝐌

Grade 9 Physics Notes:               Unit 3 Motion in a Straight Line Motion in a Straight Line This unit explores the fundamentals of motion, focusing on objects moving in a single direction (straight line). 1.1 Position, Distance, and Displacement ”Life is like riding a bicycle. To keep your balance, you must keep moving.” Albert Einstein To describe motion, we use these key concepts: • Frame of Reference: A coordinate system to specify the location of objects in space and time. • Position: The location of an object relative to a reference point (often the origin). • Distance: The total length of the path traveled by an object. It’s a scalar quantity. • Displacement: The change in position of an object, measured as a straight line from the starting point to the ending point. It’s a vector quantity, so it includes direction. Example: Imagine a person walking 3 meters east, then 4 meters north. • Distance: 3 m + 4 m = 7m • Displacement: 5 m northeast (found using the Pythagorean theorem) 1.2 Speed and Velocity Both speed and velocity describe how fast an object moves, but velocity also includes direction. 1.2.1 Average Speed Average Speed: The total distance traveled divided by the total time taken. Average Speed = Total Distance/Total Time 1.2.2 Instantaneous Speed Instantaneous Speed: The speed of an object at a particular moment in time. Think of the reading on your car’s speedometer. 1.2.3 Average Velocity Average Velocity: The total displacement divided by the total time taken. Average Velocity =Total Displacement/ Total Time 1.2.4 Instantaneous Velocity Instantaneous Velocity: The velocity of an object at a particular moment in time, including both speed and direction. 1.3 Acceleration Acceleration: The rate at which velocity changes over time. It can be a change in speed, direction, or both. • Formula: a = ∆v/∆t where: – a = acceleration – ∆v = change in velocity – ∆t = change in time • Units: Meters per second squared (m/s²) • Positive Acceleration: Speeding up. • Negative Acceleration (Deceleration):Slowing down. 1.4 Uniform Motion Uniform Motion: Motion at a constant velocity. This means moving in a straight line at a constant speed. • Examples: – A train traveling at a steady speed on a straight track. – An object gliding through space with no forces acting on it. 1.5 Graphical Representation of Motion Graphs help visualize how position, velocity, and acceleration change over time. 1.5.1 Position-Time Graphs • X-axis: Time • Y-axis: Position • Slope of the Graph: Represents velocity. – Steeper slope = higher velocity – Horizontal line (zero slope) = object at rest. 1.5.2 Velocity-Time Graphs • X-axis: Time • Y-axis: Velocity • Slope of the Graph: Represents acceleration. – Positive slope = positive acceleration – Negative slope = negative acceleration (deceleration) – Horizontal line (zero slope) = constant velocity • Area under the Curve: Represents displacement. ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

1. Which organelle is responsible for protein synthesis? (a) Ribosomes (b) Mitochondria (c) Golgi apparatus (d) Nucleus 2. What is the semi-permeable barrier that surrounds the cell? (a) Cell membrane (b) Cell wall (c) Cytoplasm (d) Nucleus 3. Which type of cell does not have a nucleus? (a) Prokaryotic cell (b) Eukaryotic cell (c) Plant cell (d) Animal cell 4. What is the function of the cytoskeleton? (a) To store genetic material (b) To transport materials (c) To provide structural support (d) To synthesize proteins 5. Which organelle is responsible for cellular respiration? (a) Mitochondria (b) Chloroplasts (c) Ribosomes (d) Golgi apparatus 6. Which type of cell is found in plants but not in animals? (a) Prokaryotic cell (b) Eukaryotic cell (c) Plant cell (d) Animal cell 7. Which type of cell has a cell wall made of cellulose? (a) Prokaryotic cell (b) Eukaryotic cell (c) Plant celli (d) Animal cell 8. Which type of cell has a large central vacuole? (a) Prokaryotic cell (b) Eukaryotic cell (c) Plant cell (d) Animal cell 9. Which type of cell is specialized for muscle contraction? (a) Muscle cell (b) Nerve cell (c) Red blood cell (d) White blood cell 10. Which type of cell is responsible for fighting infection? (a) Muscle cell (b) Nerve cell (c) Red blood cell (d) White blood cell 📘Answer Key: 1. a 2. a 3. a 4. c 5. a 6. c 7. c 8. c 9. a 10. d

አስደሳች ዜና ለተማሪዎች ከ9-12 ላሉ ለተፈጥሮ ሳይንስ ተማሪዎች ምርጥ Entrance based tutorial ስላዘጋጀን በማይታመን ዋጋ ማግኘት ይችላሉ። 1.ከተለያዩ ዓመት የውጡ UEE ጥያቄዎችን እንሰራለን። 2.በየሳምንቱ የጥናት ፕሮግራም እናወጣለን። 3. በሳምንት 3 ዙር የLive ፕሮግራም ይኖረናል። 4.ምክሮች፣ ውይይቶች እና አስተያየት የምንሰጠው እና የምንቀበለው ጊዜ ይኖረናል። 5. የሀገር ውስጥ እና ውጪ አጋዥ መጽሐፍቶችን እንሰጣለን። ዋጋ፡ 100 ብር ብቻ ማሳሰቢያ:-👇👇👇 📖 ትምህርት ከጀመርን አንድ ሳምንት ሆኖናል ስለዚህ ብዙ ትምህርት ሳያመልጣችሁ  ቀድማችሁ በጊዜ እንድትመዘገቡ እናሳስባለን🙏 ይህንን አካውንት በመንካት እና በማናገር ይመዝገቡ። 👇👇👇👇👇👇👇 ╔═══════════╗   @AMBESSA2024 ╚═══════════╝                ወይም     ╔═══════════╗          @Wases27 ╚═══════════╝ ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

ተማሪዎች ! የግሎብ ዶክ አካዳሚዎች ቭድዮዋቸውን ከዩቱብ በማጥፋት አፕልከሽን ውስጥ አድርገው ከፍያ ይፈለጋሉ ይሁን እንጂ አንዳንድ ምዕራፎችን ከፈለጋችሁ እንለቅላችኃለን። ለምሳሌ የ11ኛ ክፍል ባዮሎጂ ምዕራፍ ሁለት ከፈለጋችሁ ማታ እንለቃለን።

አስደሳች ዜና ለተማሪዎች ከ9-12 ላሉ ለተፈጥሮ ሳይንስ ተማሪዎች ምርጥ Entrance based tutorial ስላዘጋጀን በማይታመን ዋጋ ማግኘት ይችላሉ። 1.ከተለያዩ ዓመት የውጡ UEE ጥያቄዎችን እንሰራለን። 2.በየሳምንቱ የጥናት ፕሮግራም እናወጣለን። 3. በሳምንት 3 ዙር የLive ፕሮግራም ይኖረናል። 4.ምክሮች፣ ውይይቶች እና አስተያየት የምንሰጠው እና የምንቀበለው ጊዜ ይኖረናል። 5. የሀገር ውስጥ እና ውጪ አጋዥ መጽሐፍቶችን እንሰጣለን። ዋጋ፡ 100 ብር ብቻ ማሳሰቢያ:-👇👇👇 📖 ትምህርት ከጀመርን አንድ ሳምንት ሆኖናል ስለዚህ ብዙ ትምህርት ሳያመልጣችሁ  ቀድማችሁ በጊዜ እንድትመዘገቡ እናሳስባለን🙏 ይህንን አካውንት በመንካት እና በማናገር ይመዝገቡ። 👇👇👇👇👇👇👇 ╔═══════════╗   @AMBESSA2024 ╚═══════════╝                ወይም     ╔═══════════╗          @Wases27 ╚═══════════╝ ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

INTRODUCTION TO PARTS OF SPEECH THERE ARE 8 PARTS OF SPEECH Nouns: Describe person, place and thing. Pronouns: Words used in place of nouns. Verbs: Words that express actions or state. Adjectives: Words that show the quality of nouns or pronouns. Adverbs:Words that show the quality of verbs,adjectives or adverbs. Prepositions: Words that relate a noun or pronoun to other noun or pronoun in a sentence. Conjunctions: Words that join sentences. ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

ዛሬ ቀኑ ቅዳሜ ነው ሰዓቱ ከጠዋቱ 2:00 ስለሆነ የኬሚስትሪ ቁርስ ከኦሞ አካዳሚ ተጋብዘዋል። 1. Which of the following is a common oxidizing agent?    a) H₂     b) Cl₂     c) Na     d) C 2. In the reaction  Zn + Cu²⁺ → Zn²⁺ + Cu , which species is the oxidizing agent?    a) Zn     b) Cu²⁺     c) Zn²⁺     d) Cu 3. What is the oxidation state of sulfur in  H₂SO₄ ?    a) +4     b) +6     c) -2     d) 0 4. In the following half-reaction,  Fe³⁺ + 3e⁻ → Fe , what role does  Fe³⁺  play?    a) Reducing agent     b) Oxidizing agent     c) Neither     d) Catalyst 5. Which of the following pairs contains an oxidizing agent and a reducing agent?    a) H₂O and O₂     b) Na and Cl₂     c) H₂ and N₂     d) K and I₂ 6. What is the oxidation state of nitrogen in  NH₃ ?    a) -3     b) +1     c) +3     d) -1 7. In balancing redox reactions, which of the following steps is NOT part of the oxidation change method?    a) Assign oxidation states     b) Identify the oxidizing and reducing agents     c) Write the overall reaction without balancing     d) Balance the number of electrons transferred 8. Which of the following substances acts as a reducing agent in the reaction  Cr₂O₇²⁻ + 14H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O ?    a) Cr₂O₇²⁻     b) H⁺     c) e⁻     d) None of the above 9. What is the oxidation number of carbon in  CH₄ ?    a) -4     b) +4     c) 0     d) +2 10. In the reaction  C₆H₁₂ + O₂ → C₆H₁₀ + H₂O , which element undergoes oxidation?     a) Carbon      b) Hydrogen      c) Oxygen      d) None of the above 11. Which of the following is a characteristic of reducing agents?     a) They gain electrons.      b) They lose electrons.      c) They increase oxidation states.      d) They are always metals. 12. How many electrons are transferred in the balanced half-reaction  MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O ?     a) 3      b) 5      c) 7      d) 8 13. In redox reactions, what happens to the oxidation state of an element that is oxidized?     a) It decreases.      b) It remains the same.      c) It increases.      d) It cannot be determined. 14. Which of the following compounds can act as both an oxidizing agent and a reducing agent?     a)  H₂O       b)  H₂O₂       c)  NaCl       d)  O₂ 15. When balancing redox reactions, what should you do first when using the oxidation change method?     a) Balance all atoms except O and H.      b) Assign oxidation states to all elements.      c) Write down the final balanced equation.      d) Add coefficients to balance hydrogen and oxygen. '' መልሱን ከታች leave a comment ስር አስቀምጠናል።'' ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

❓|| Biology multiple-choice questions (MCQs) on biochemical molecules along with their answers 1. Which of the following is a major class of biomolecules that are essential for energy storage and cell structure? _A) Nucleic acids _B) Carbohydrates _C) Proteins _D) Lipids Answer: B) Carbohydrates 2. What type of bond holds the two strands of DNA together? _A) Hydrogen bond _B) Ionic bond _C) Covalent bond _D) Peptide bond Answer: A) Hydrogen bond 3. Which of the following is a monosaccharide? _A) Sucrose _B) Glucose _C) Lactose _D) Starch Answer: B) Glucose 4. Which of the following is the main structural component of the cell membrane? _A) Carbohydrates _B) Proteins _C) Lipids _D) Nucleic acids Answer: C) Lipids 5. What is the basic building block of proteins? _A) Nucleotide _B) Fatty acid _C) Amino acid _D) Monosaccharide Answer: C) Amino acid 6. Which of the following enzymes is responsible for breaking down starch into simpler sugars? _A) Amylase _B) Lipase _C) Protease _D) Ligase Answer: A) Amylase 7. Which molecule is the primary energy carrier in cells? _A) ATP _B) NADH _C) Glucose _D) RNA Answer: A) ATP 8. Which of the following is true about the structure of nucleic acids? _A) Nucleic acids consist of a sugar, phosphate group, and a nitrogenous base. _B) Nucleic acids are composed of amino acids. _C) Nucleic acids do not contain phosphate groups. _D) Nucleic acids are made only of sugars. Answer: A) Nucleic acids consist of a sugar, phosphate group, and a nitrogenous base. 9. Which type of lipid is most commonly found in cell membranes? _A) Triglycerides _B) Phospholipids _C) Steroids _D) Waxes Answer: B) Phospholipids 10. Which of the following best describes the structure of a triglyceride? _A) A sugar molecule linked to a phosphate group _B) A single amino acid linked to a protein _C) Three fatty acids linked to a glycerol backbone _D) A nitrogenous base linked to a sugar Answer: C) Three fatty acids linked to a glycerol backbone

5 𝐛𝐫𝐚𝐧𝐜𝐡𝐞𝐬 𝐨𝐟 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝐈. 𝐏𝐡𝐲𝐬𝐢𝐜𝐚𝐥 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 :-𝐬𝐭𝐮𝐝𝐢𝐞𝐬 𝐦𝐚𝐜𝐫𝐨𝐬𝐜𝐨𝐩𝐢𝐜 𝐩𝐫𝐨𝐩𝐞𝐫𝐭𝐢𝐞𝐬 , 𝐚𝐭𝐨𝐦𝐢𝐜 𝐩𝐫𝐨𝐩𝐞𝐫𝐭𝐢𝐞𝐬 𝐚𝐧𝐝 𝐩𝐡𝐞𝐧𝐨𝐦𝐞𝐧𝐚 𝐢𝐧 𝐜𝐡𝐞𝐦𝐢𝐜𝐚𝐥 𝐬𝐲𝐬𝐭𝐞𝐦. 𝐈𝐈. 𝐎𝐫𝐠𝐚𝐧𝐢𝐜 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 :-𝐬𝐭𝐮𝐝𝐲 𝐨𝐟 𝐬𝐮𝐛𝐬𝐭𝐚𝐧𝐜𝐞 𝐜𝐨𝐧𝐭𝐚𝐢𝐧𝐢𝐧𝐠 𝐜𝐚𝐫𝐛𝐨𝐧. 𝐈𝐈𝐈.𝐈𝐧𝐨𝐫𝐠𝐚𝐧𝐢𝐜 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲:-𝐬𝐭𝐮𝐝𝐲 𝐨𝐟 𝐬𝐮𝐛𝐬𝐭𝐚𝐧𝐜𝐞 𝐭𝐡𝐚𝐭 𝐚𝐫𝐞 𝐧𝐨𝐭 𝐩𝐫𝐢𝐦𝐚𝐫𝐢𝐥𝐲 𝐛𝐚𝐬𝐞𝐝 𝐨𝐧 𝐜𝐚𝐫𝐛𝐨𝐧. 𝐈𝐕. 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐚𝐥 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲:-𝐬𝐭𝐮𝐝𝐲 𝐨𝐟 𝐜𝐨𝐦𝐩𝐨𝐬𝐢𝐭𝐢𝐨𝐧 𝐨𝐟 𝐦𝐚𝐭𝐭𝐞𝐫. 𝐈𝐭 𝐟𝐨𝐜𝐮𝐬𝐞𝐬 𝐨𝐧 𝐢𝐝𝐞𝐧𝐭𝐢𝐟𝐲𝐢𝐧𝐠, 𝐪𝐮𝐚𝐧𝐭𝐢𝐟𝐲𝐢𝐧𝐠 𝐚𝐧𝐝 𝐬𝐞𝐩𝐚𝐫𝐚𝐭𝐢𝐧𝐠 𝐜𝐡𝐞𝐦𝐢𝐜𝐚𝐥𝐬 𝐢𝐧 𝐬𝐚𝐦𝐩𝐥𝐞 𝐨𝐟 𝐦𝐚𝐭𝐭𝐞𝐫. 𝐕. 𝐁𝐢𝐨 𝐜𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲:- 𝐭𝐡𝐞 𝐬𝐭𝐮𝐝𝐲 𝐨𝐟 𝐜𝐡𝐞𝐦𝐢𝐜𝐚𝐥 𝐩𝐫𝐨𝐜𝐞𝐬𝐬 𝐭𝐡𝐚𝐭 𝐚𝐫𝐞 𝐨𝐜𝐜𝐮𝐫 𝐢𝐧 𝐥𝐢𝐯𝐢𝐧𝐠 𝐭𝐡𝐢𝐧𝐠𝐬. ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

Private class notes and ppts

Wow ! ዛሬ ቀጥታ ማስታወቂያውን ካውጡት ከ wing one academy መልስ አግንተናልና ፎቶውን ይመልከቱ ነገ ደግሞ ቭድዮዋቸውን እንለቃለን። 12ኛ ክፍል ተማሪዎች አላችሁ? ለነገ ምን ያህል ዝግጁ ናችሁ? ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

እስከ አሁን ባለው መረጃ  ከwing one academy ዉጪ ምንም አልተነገረንም፣ አላገኘንም። ከሌላ ምንጭ የምታገኙት መረጃ ካላችሁ በዚህ ሊንክ @AMBESSA2024 ላኩልን። እስከዛው ሀሳባችሁን እና አስተያየታችሁን በኮሜንት አስቀምጡ። ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

እስከ አሁን ባለው መረጃ  ከwing one academy ዉጪ ምንም አልተነገረንም፣ አላገኘንም። ከሌላ ምንጭ የምታገኙት መረጃ ካላችሁ በዚህ ሊንክ @AMBESSA2024 ላኩልን። እስከዛው ሀሳባችሁን እና አስተያየታችሁን በኮሜንት አስቀምጡ። ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

ይህ መረጃ አልተረጋገጠም ! በደንብ ከተረጋገጠ በዚህ ቻነል ላይ Post የምናደርገው ይሆናል። እስከዛው ሀሳባችሁን እና አስተያየታችሁን በኮሜንት አስቀምጡ። ➦Share   🗨️ Comment       ➣Forward 👇 Join us for more 👇 ╔═══════════╗   @omo_academy ╚═══════════╝ 𝐎𝐌𝐎 𝐀𝐂𝐀𝐃𝐄𝐌𝐘             𝒀𝒐𝒖𝒓 𝒑𝒂𝒕𝒉 𝒘𝒂𝒚 𝒕𝒐 𝒔𝒖𝒄𝒄𝒆𝒔𝒔 !

#ማስታወቅያ ነው ቻናላችን ጋር አይገናኝም

#ማስታወቅያ የጌታ ጸጋ እና ሰላም ይብዛላችሁ። በዚህ የቴሌግራም ቻናሌ አጫጭር፣ ተከታታይ እና መጽሐፍ ቅዱስን መሠረት ያደረጉ ትምህርታዊ ጹሑፎችን፣ እና የተለያዩ መንፈሳዊ ሥራዎቼን አቀርባለሁ። በተጨማሪ ለመንፈሳዊ ሕይወት ጠቃሚ የሆኑ በግሌ የተጠቀምኳቸውን የሌሎች ክርስቲያን ወንድሞችን ትምህርቶችን፣ መጻሕፍቶችን፣ ጹሑፎችንና መዝሙሮችን ምንጭ በመጥቀስ እና ለባሌበቱ እውቅና በመስጠት ለማቅረብ ጥራለሁ። በግሌ ማናገር ከፈለጋችሁ ከሥር ባሉ አድራሻዎች ማግኘት ትችላላችሁ። @Yimesgenn +251940631112 ✍️ በይመስገን ሽበሽ Link : https://t.me/YIMESGENSHIBESHI