Category: STD09
Gravitation
Class 09 | Physics Topic tree Terms and Definitions Circular Motion Basics Concept Videos Newtons Laws of Gravitation What happens to the force between two objects, if the mass of one object is doubled, the distance between the objects is doubled and tripled, the masses of both objects are doubled? x
Euclid’s Geometry
Concepts Geo means EarthMetry means measurement Statement – a sentence – either true or false – but cannot be both.e.g. 3 + 8 = 10 false statement3+ 8 = 11 = correct statementKala is fair. This is not a statement. because, for some persons she may look fair; for others she may not look fair….
Fundamental Units of Life
Class 9 | Biology Terms and defintions Quiz Multiple choice questions Key
Matter in our Surrounding
Class 9 | Science 1. Introduction to Matter: 2. Characteristics of Particles in Matter: 3. Change of State: 4. Effect of Heat on Matter: 5. Factors Affecting Evaporation: 6. Evaporation Causes Cooling: 7. Sublimation: 8. Diffusion: 9. Brownian Motion: 10. Matter is Composed of Particles:– The particle nature of matter explains various properties and behaviors…
Nutrition and Health
Class 9 | Science Introduction to Nutrition: Healthy Eating: Carbohydrates: Proteins: Fats: Vitamins and Minerals: Water: Dietary Guidelines: Food Labels: Eating Disorders: Exercise and Physical Activity: Common Health Issues: Meal Planning: Food Safety: Dietary Preferences and Restrictions: Nutrition and Growth: Special Dietary Needs: Multiple Choice Questions Key Certainly, here are the answers to the 20…
Real Numbers
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Periodic Elements
Class 9 | TN State Board Science Key Concepts Atomic Structure: Periodic Table: Atomic Number (Z): Atomic Mass (Atomic Weight): Valence Electrons: Chemical Bonding: Periodic Trends: Noble Gases: Alkali Metals: Halogens: Transition Metals: Metals vs. Nonmetals: Metalloids: Fill in the Blank Questions Answer the following fill in the blank questions. Key Verify your answers.
Euclid Geometry
Here are Euclid’s five common notions (axioms): Euclid’s Postulates: To give a concrete example, here are the five postulates from Euclid’s “Elements” that form the foundation of Euclidean geometry: Problem Prove that an equilateral triangle can be constucted on any given line segment.
Addition and subtraction in polynomials
Concept Video Any Time Online Quiz A polynomial is a mathematical expression consisting of variables, coefficients, and mathematical operations such as addition, subtraction, and multiplication. It is composed of terms, where each term includes a variable raised to a non-negative integer exponent, multiplied by a coefficient. Polynomials can have one or multiple variables and can…
Determination of atomic mass
Atomic mass can be determined by applying the following formula. Atomic mass = (w1A1 + w2A2)/(w1+w2) If the weight is given in terms of weight percentage replace w1 as w1% , w2 as w2 % and (w1 + w2) as 100 respectively in the above equation.