Echoes Within

Echoes Within blog logo – self-reflection, emotional intelligence, and mindful living

Echoes Within

β€œA voice beyond facts β€” where science meets reflection.”

β€œEchoes Within β€” Learning. Thinking. Sharing.”

Course Content
Physics
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] Physics (15 Marks) 1.Units and Dimensions, 2.Scalar and Vectors, 3.Motion, 4.Friction, 5.Simple Machines, 6.Source of Energy, 7.Work, Energy, Power, 8.Circular Motion, 9.Gravitation, 10.Hydrostatics, 11.Pressure, 12.Heat and Temperature, 13.Quantity of Heat, 14.Thermal Expansion, 15.Transfer of Heat, 16.Waves, 17.Sound, 18.Reflection, 19.Refraction, 20.Spherical mirrors and Lenses, 21.Prism, 22.Human Eye, 23.Microscope, 24.Telescope, 25.Magnets, 26.Electrolysis, 27.Transformer, 28.Electromagnetic induction, 29.Magnetic Effect, 30.Electricity, 31.Astronomy, 32.Zeology
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Chemistry
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] Chemistry (15 marks) 1.General and Language of Chemistry Atoms, Ion, Molecule, Elements, Compounds, Radicals, Valency, Commercial names of compounds, Types of Chemical reaction, Methods of mixture 2.Periodic Table 3.Structure of atom 4.Avogadroe's number and mole concept 5.Chemical bond: Ionic, Covalent and Co-ordinate covalent bond 6.Electrolysis 7.Acid, bace and salt 8.Metals and Metallurgy 9.Non metals and some important gases(H2, N2, O2, NH3, CO2) 10.Organic Chemistry 11.Chemistry in service of Mankind (Plastic, Glass, Cements, Ceramics, Fertilizers, Fibres, Pesticides, Soap and detergents) 12.Environmental Pollution 13.Hardness of water
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Biology -Botany
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] Biology (15 marks) Botany 1.Introduction to botany and its branches 2.Classification: ( Fungi, Plantae, Monera) 3.Cell and Cell division 4. Genetics 5.Adaptation of plants 6.Life cycle of mushroom and fern 7.Environmental Pollution
Biology – Zoology
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] Biology (15 marks) Zoology 1. Introduction to zoology and its branches. 2. Classification: Protista and Animalia 3. Life Cycle of Silkworm, Honeybee and Mosquito with their economic importance 4. Organic Evolution 5. Human Body system (Digestive, Respiratory, Circulatory, Excretory, Nervous, Glandular: Endocrine System and Skeletal) 6.Reproduction: Sexual and Asexual 7. Cromosomes and sex-determination 8.Adaptation: Introduction and types
GK
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] GK and IQ (10 marks) GK: 1.History and Geography 2. Civic sense and polity 3. Economy 4.Science and Technology 5. Culturelanguage and literature 6. Sports 7.Current Affairs 8.Miscellaneous
IQ
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] GK and IQ (10 marks) IQ 1.Sequence and series 2. Coding and Decoding 3. Logical Expression 4. Jumble Words 5.Geometric figures 6. Miscellaneous
English
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] English (15 Marks) 1. Articles 2. Prepositions 3. Tense 4. Voice 5. Transformations 6. Question Tags 7. Concord 8. Conditional 9. Causative verbs 10. Relative Clauses 11. Conjunctions 12. Reported Speech 13. Literary figures and their works 14. Synonyms/ Antonyms
Mathematics
As syllabus for Grade XI Entrance Examination (Science)-2081 [Sainik Awasiya Mahavidyalaya] Maths (20 Marks) 1. Set and Algebra: a. Set, b. Function, c. Polynomial, d. Sequence and series, e. HCF and LCM, f. Surds, g. Indices, h. Rational fractions, i. Equation 2. Arithmetics: a. Percentage b. Time and work c. Profit and Loss, discount and VAT d. Simple and compound interest e. Compound depreciation and population growth. 3. Mensuration a. Area of triangle and quadrilaterals b. Area and volume of cylinder, cone, sphere, prism, and pyramid 4.Geometry a Properties or theorems on triangle, parallelogram and circle 5. Statistics and probability a. Measures of central tendency (mean, median, mode, quartiles) b. Probability 6. Trigonometry
Bridge Course for NEB 11 Science (Post-SEE)

πŸ”Š Summary Note: Sound

Here is a concise and student-friendly summary note for the lesson “Sound”, tailored for SEE-passed students preparing for NEB Grade 11 Science entrance exams:

πŸ“˜ Definition:

Sound is a form of energy that is produced by vibrating objects and is transmitted through a medium (solid, liquid, or gas) as mechanical waves.

Sound


🌊 Nature of Sound Waves:

  • Type: Longitudinal mechanical waves.

  • Medium: Requires a medium (like air) to travel. Cannot travel through a vacuum.

  • Propagation: Involves compressions (high pressure) and rarefactions (low pressure) in the medium.

πŸ”‘ Important Terms:

Term Description
Frequency (f) Number of vibrations per second. Unit: Hertz (Hz). Determines pitch.
Amplitude (A) Maximum displacement from the rest position. Determines loudness.
Wavelength (Ξ») Distance between two successive compressions or rarefactions. Unit: meter (m).
Time Period (T) Time taken for one complete vibration. T = 1/f
Speed of Sound (v) Depends on the medium. v = f Γ— Ξ»

πŸ“ Speed of Sound in Different Media (approx.):

  • Air (at 25Β°C): ~343 m/s

  • Water: ~1500 m/s

  • Steel: ~5000 m/s

🎯 Characteristics of Sound:

  • Pitch: High pitch β†’ High frequency

  • Loudness: Large amplitude β†’ Loud sound

  • Quality (Timbre): Distinguishes different sound sources even with the same pitch and loudness

🌟 Reflection of Sound:

  • Echo: Reflection of sound heard after a short delay (minimum distance: 17.2 m at 20Β°C)

  • Used in SONAR, medical imaging, and echolocation.

🧠 Human Hearing Range:

  • Audible range: 20 Hz to 20,000 Hz

  • Infrasonic: < 20 Hz

  • Ultrasonic: > 20,000 Hz (used in medical imaging and sonar)

πŸ”Ž Applications of Sound:

  • Communication (speaking, telephones)

  • SONAR (measuring depth in oceans)

  • Medical imaging (ultrasound)

  • Animal echolocation (bats, dolphins)

πŸ”Ž You Can Also Read:

Wave

Wave – MCQ Quiz

Advanced MCQ Quiz Set: Wave

How to Choose the Right Stream After SEE in Nepal

SEE Result: New Possibilities and Uncertainties for Students’ Future Careers in Nepal

CDC

Understanding sound not only helps us appreciate how we communicate and experience the world, but also opens doors to real-world applicationsβ€”from medical imaging to underwater exploration.
Now that you’ve mastered the key concepts of sound, test your knowledge with practice quizzes and challenge yourself with past entrance exam questions.

πŸ‘‰ Stay curious, keep practising, and get one step closer to success in your NEB Grade 11 Science journey!