Chapter 20, Problem 9QAP

Below is a rough schematic of the lighting system for a streetcar powered by a 120 VDC supply. How can I arrange the wires inside the trolley for the interior lights (1-16), headlights (19-20), doors (21-24), and platform lights (17-18), ensuring that each has its own switch? Does the electrical system require additional safety components? What type of cable can be used for wiring these lights?

Subject: Computer databases please show all the work, draw the ER diagram

Subject: Computer databases please show all the work, draw the ER diagram

Subject : Computer databases    please show all the work, draw the ER diagram

Subject: Computer databases please show all the work, draw the ER diagram

please show all the work, draw the ER diagram

module : java    q1 and q2 in image    Question3:                                                                                                                                    (30 MARKS) Passenger Rail Agency for South Africa Train Scheduling System Problem Statement Design and implement a train scheduling system for Prasa railway network. The system should handle the following functionalities: 1. Scheduling trains: Allow the addition of train schedules, ensuring that no two trains use the same platform at the same time at any station. 2. Dynamic updates: Enable adding new train schedules and canceling existing ones. 3. Real-time simulation: Use multithreading to simulate the operation of trains (e.g., arriving, departing). 4. Data management: Use ArrayList to manage train schedules and platform assignments. Requirements 1. Add Train Schedule, Cancel Scheduled Train, View Train Schedules and Platform Management 2. Concurrency Handling with Multithreading i.e Use threads to…

module : java  Question 1: (40 MARKS) E-Hailing Bicycle Management System Case Study:An e-hailing company that rents out bicycles needs a system to manage its bicycles, users, and borrowing process. Each user can borrow up to 2 bicycles at a time, specifically for families with children 18 years or below. The system must track the bicycles (name, make, type, and availability) and users (name, ID, and borrowed bicycles). The company also wants to ensure that the system uses a multidimensional array to store information about the bicycles. Requirements: Add and View Bicycles: Borrow Bicycles: Return Bicycles Display Borrowed Bicycles and Search for a bicycle Create a menu-driven program to implement the above. Sample Output: Add Bicycle View All Bicycles Borrow Bicycle Return Bicycle View Borrowed Bicycles Search Bicycle ExitEnter your choice:

this module is java 371. please answer all questions correctly , include all comments etc and follow all requirements.   Question 1: (40 MARKS) E-Hailing Bicycle Management System Case Study:An e-hailing company that rents out bicycles needs a system to manage its bicycles, users, and borrowing process. Each user can borrow up to 2 bicycles at a time, specifically for families with children 18 years or below. The system must track the bicycles (name, make, type, and availability) and users (name, ID, and borrowed bicycles). The company also wants to ensure that the system uses a multidimensional array to store information about the bicycles. Requirements: Add and View Bicycles: Borrow Bicycles: Return Bicycles Display Borrowed Bicycles and Search for a bicycle Create a menu-driven program to implement the above. Sample Output: Add Bicycle View All Bicycles Borrow Bicycle Return Bicycle View Borrowed Bicycles Search Bicycle ExitEnter your choice: Question 2…