Yahya and Mathematics are very close friends, they even call themselves the algebros. The algebros decided to go cruising one day. The trip will take hours to complete. It starts by travelling dkm to the Numbers Island, spending y hours at the island, then leaving the island and going back to the starting point using the same path. The water current goes toward the island with a speed of vkm/hour, so their journey toward the island will be faster than their journey back If you know that the ship's base speed [its speed without the effect of the waves) was constant the whole time, can you figure out the ship's base speed, and how much time did it take to complete the first half of their trip to reach the Island? The problem guarantees that there is always only one correct answer

Yahya and Mathematics are very close friends, they even call themselves the algebros. The algebros decided to go cruising one day. The trip will take hours to complete. It starts by travelling dkm to the Numbers Island, spending y hours at the island, then leaving the island and going back to the starting point using the same path. The water current goes toward the island with a speed of vkm/hour, so their journey toward the island will be faster than their journey back If you know that the ship's base speed [its speed without the effect of the waves) was constant the whole time, can you figure out the ship's base speed, and how much time did it take to complete the first half of their trip to reach the Island? The problem guarantees that there is always only one correct answer

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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You are trapped in a room. There are n consecutive doors in front of you, with each door being behind the previous door. You need to open all doors to escape. In the same room, there are n switches and each switch connects to a different door. However, you don't know which switch connects to which door AND for some doors the "up" position will close the door while for other doors the "down" position will open the door. You will need to place all n switches in the correct configuration to escape. You can set the switches in any configuration and walk over to check which is the first closed door (since the doors are consecutive, you can't see the status of the doors behind the first closed one). What is an algorithm that will find the correct configuration to open all doors within O(n log n) trials?
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A project currently underway at Chemical Labs, Inc requires that a substance be continued ally heated in a vat. A technician must check the substance's temperature every 15 minutes. If the substance's temperature does not exceed 102.5 degree Celsius, then the technician does nothing. However, if the temperature is greater than 102.5 degrees Celsius, the technician must turn down the vat's thermostat, wait 5 minutes, and check the temperature again. The technician repeats these step until the temperature does not exceed 102.5 degree Celsius. The director of engineering department has asked you as a programmer to writes a program that guides the technician through this process. a) Write the flow chart that can be use to write the program. b) Do a program as request from the director. The expected output should be like this: Enter the substance's temperature (in Celsius): 104.7 [Enter] The temperature is TOO HIGH. Turn the thermostat down and WAIT for 5 minutes. Then take the temperature…
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