This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here are the solutions for the questions: a) Step 1: Identify the device used to store electric charges. A device used to store electric charges is a capacitor. Step 2: Draw the circuit symbol for a capacitor. The circuit symbol for a capacitor is: -- | | -- Function: A capacitor stores electrical energy in an electric field between two conductive plates. b) i) The total cost of energy bought. Step 1: Identify the amount of energy bought and the cost per unit. Energy bought = 7400 units. Cost per unit = 1.50 shillings. Step 2: Calculate the total cost. Total Cost = Energy bought × Cost per unit Total Cost = 7400 units × 1.50 shillings/unit Total Cost = 11100 shillings The total cost of energy bought is 11100 shillings. ii) The number of days the heater can be used. Step 1: Calculate the energy consumed by the heater per day. Power of heater (P) = 2 kW. Time used per day (t) = 5 hours. Energy consumed per day (E_day) = P × t. E_day = 2 kW × 5 h = 10 kWh/day Step 2: Identify the total energy available. Total energy available (E_total) = 7400 units = 7400 kWh. Step 3: Calculate the number of days the heater can be used. Number of days = E_totalE_day Number of days = 7400 kWh10 kWh/day Number of days = 740 days The heater can be used for 740 days. 3 done, 2 left today. You're making progress.