Igcse unit 4 - Study guides, Class notes & Summaries

IGCSE PHYSICS EXAM PREPARATION QUESTIONS AND ANSWERS. 2 cons of nuclear power? -Answer-1 - risk of meltdown 2 - difficulty with sorting waste 3 advantages of nuclear power? -Answer-1 - high energy density 2 - readily available for fluctuations in energy demand 3 - non-polluting 3 disadvantages of fossil fuels? -Answer-1 - limited supply 2 - greenhouse gases produced 3 - burning oil and coal releases sulfur dioxide which forms acid rain (expansive to extract from flue gases) 3 disa...

These slides cover Unit 4 Business Studies for IGCSE, and include the below topics: 4 Operations management 4.1 Production of goods and services 4.1.1 The meaning of production: • Managing resources effectively to produce goods and services • Difference between production and productivity • Benefits of increasing efficiency and how to increase it, e.g. increasing productivity by automation and technology, improved labour skills • Why businesses hold inventories • The concept ...

IGCSE CAIE CHEMISTRY UNIT 4: ELECTROCHEMISTRY NOTES COMPREHENSIVE NOTES ON UNIT 4: ELECTROCHEMISTRY

Edexcel IGCSE Physics Guaranteed Success 1. Define average speed using the formula. - Average speed (v) = distance (d) / time (t) 2. What is the standard unit for mass (m)? - The standard unit for mass is the kilogram (kg). 3. What is the standard unit for distance (d) or displacement (s)? - The standard unit for distance or displacement is the meter (m). 4. What is the standard unit for speed (s) or velocity (v)? - The standard unit for speed or velocity is meters per second (m/s). 5....

iGCSE Edexcel Physics Definitions Already Rated A+ 1. Define acceleration and describe how it changes with time. - Acceleration is the rate at which velocity changes over time. 2. Explain what air resistance (drag) is in the context of motion. - Air resistance (drag) is the force that opposes the motion of objects moving through air. 3. What does alternating current (AC) refer to? - Alternating current (AC) is an electric current that changes direction continuously. 4. What is the purpos...

Summary of the Cambridge IGCSE Environmental Management Coursebook Unit 4 (Water and it's management)

Physics IGCSE – Electricity Complete Answers 1. Insulation - Used to prevent electrical shocks when touching a wire. 2. Circuit Breakers - Break the circuit if the current exceeds a safe limit, using an electromagnet to trip a mechanism. 3. Earthing - Directs excess current safely to the ground, preventing electric shocks if a live wire becomes disconnected. 4. Double Insulation - Found in appliances like vacuum cleaners with plastic casings, eliminating the need for an earth wire ...

IGCSE Edexcel Physics Electricity 1. Define current and state its unit of measurement. - Current is measured in amps (A) and represents the flow of electric charge. 2. What unit is used to measure charge? - Charge is measured in Coulombs (C), representing the amount of electric charge. 3. Describe the unit used to measure energy in electrical systems. - Energy in electrical systems is measured in Joules (J). 4. Define resistance and state its unit. - Resistance is measured in Ohms (Ω) a...

Physics IGCSE Unit 5 – Pressure Already Graded A+ 1. Definition of pressure... - Pressure is the force applied per unit area. 2. Pressure formula... - Pressure = Force divided by Area (P = F/A). 3. Units of pressure... - Pressure is measured in Pascals (Pa) or Newtons per square meter (N/m²). 4. Definition of density... - Density is the amount of mass per unit volume. 5. Density formula... - Density = Mass divided by Volume (d = m/V). 6. Units of density... - Density is measured...