Tamil Nadu Board Class 10 Science — Flashcards for Quick Revision

A: Force is an external effort in the form of a push or pull that can: (1) produce or try to produce motion of a static body, (2) stop or try to stop a moving body, or (3) change or try to change the dir

A: Inertia is the property of a body to resist any change in its state of rest or motion. Example: When a bus suddenly stops, passengers lean forward because their body tends to continue moving forward (

A: 1. Inertia of rest: Resistance to change from rest to motion. Example: Shaking a tree makes leaves fall because leaves resist the change. 2. Inertia of motion: Resistance to change from motion to rest

A: Key properties of light: 1. Light is a form of energy 2. Light travels in straight lines 3. Light does not need a medium - it can travel through vacuum 4. Speed of light in vacuum: c = 3 × 10⁸ m/s 5.

A: First Law of Refraction: The incident ray, the refracted ray, and the normal to the refracting surface all lie in the same plane. Second Law of Refraction (Snell's Law): The ratio of the sine of angl

A: Refractive Index (μ) Definition: The refractive index of a medium is the ratio of the speed of light in vacuum to the speed of light in that medium. Formula: μ = c/v Where: - c = speed of light in v

A: Temperature is the degree of hotness of a body, or the average kinetic energy of molecules. It determines the direction of heat flow between objects. The SI unit is kelvin (K). Other units include deg

A: Using the formula: K = °C + 273 K = 27 + 273 = 300 K Therefore, 27°C equals 300 Kelvin. This is approximately room temperature.

A: Thermal equilibrium occurs when two or more bodies have the same temperature and there is no net flow of heat between them. When you pour hot tea into a cup, the tea and cup exchange heat until they r