Elastic and Plastic Behaviour of Materials When a force is applied to a material, it deforms. This deformation can be either elastic or plastic. Elastic Deformation Elastic deformation is a temporary deformation where the material returns to its original shape and size once the force is removed. This occurs when the force applied is less … Read more
Click to expand As discussed, the spring constant (k) is specific to a particular spring or wire and doesn’t account for the material’s inherent properties. To compare the stiffness of different materials, the Young modulus is used. Defining Stress and Strain Imagine applying a force to a wire – it causes a deformation or change … Read more
Key Concepts: Load: The tensile force exerted on an object, such as a spring or wire, which causes it to stretch or extend. Extension: The increase in an object’s length or deformation from its original state when subjected to a load. As the load applied to an object increases, the extension also increases. Initially, this … Read more
Question 9(a) Find (frac{dy}{dx}) Steps of Solution Given ( y = xe^{2x} ): [frac{dy}{dx} = x cdot frac{d}{dx}(e^{2x}) + e^{2x} cdot frac{d}{dx}(x)][frac{dy}{dx} = x cdot 2e^{2x} + e^{2x} cdot 1][frac{dy}{dx} = 2xe^{2x} + e^{2x}][frac{dy}{dx} = e^{2x}(2x + 1)] Explanation of the Steps Given the function ( y = xe^{2x} ), we need to find its … Read more
Question 10(a) Steps of Solution ( a + 4d = 11 ) ( a + 6d = 3(a + d) ) ( a + 6d = 3a + 3d ) ( a + 6d – 3a – 3d = 0 ) ( -2a + 3d = 0 ) ( 3d = 2a ) ( a … Read more
0620/42_Summer_2023_Q1 (a) State which of the oxides, A to H, is responsible for acid rain. (b) State which of the oxides, A to H, has a giant covalent structure. (c) State which of the oxides, A to H, is a reducing agent in the blast furnace. (d) State which of the oxides, A to H, … Read more
Download the paper Answer Question 1 Sulfur dioxide. Explanation: Sulfur dioxide (SO₂) is a gas that can dissolve in water to form sulfurous acid, contributing to acid rain formation. Ammonia. Explanation: Ammonia (NH₃) dissolves in water to form ammonium hydroxide, which is alkaline. Xenon. Explanation: Xenon is a noble gas and is inert, meaning it … Read more
Photosynthesis and Transport in Plants Key Concepts: Photosynthesis: Process by which cells in a plant leaf produce glucose using sunlight, carbon dioxide, and water. Transport in Plants: Glucose produced in the leaves must be transported to other parts of the plant for use and storage. Xylem and Phloem: Xylem: Function: Transports water and mineral ions … Read more