Computer Science Content

  1. What is the role of computers in the modern world? Answer: Computers play a very important role in the modern world. They help us in almost every field such as education, healthcare, banking, communication, entertainment, and business. Computers make our work faster, easier, and more accurate. They are used to store information, solve problems, and control machines. 2. What are the applications of a computer? Answer: The main applications of a computer are: Education: Used for teaching, learning, and online classes. Healthcare: Used in hospitals for keeping records and diagnosing diseases. Banking: Used for managing accounts, online transactions, and ATMs. Business: Used for billing, data storage, and communication. Entertainment: Used for playing games, watching movies, and listening to music. Communication: Used for emails, chats, and video calls. Science and Research: Used for experiments, data analysis, and simulations. 3. Explain the ...

1. What are the different types of computers based on their performance and capacity? Computers can be classified into the following types based on performance and capacity: Supercomputer – Most powerful and fastest; used for weather forecasting, space research, etc. Mainframe computer – Large in size, used by big organizations for bulk data processing. Minicomputer – Smaller than a mainframe but larger than a personal computer; used in small organisations. Microcomputer (Personal Computer or PC) – Used by individuals; includes desktops and laptops. Workstation – High-performance computer for technical or scientific tasks. 2. What is the basic difference between LED and LCD? Which gives a better output? LCD (Liquid Crystal Display): Uses fluorescent backlights. Picture quality is good but brightness and contrast are limited. LED (Light Emitting Diode): A type of LCD that uses LED backlighting. It is thinner, brighter, and more energy efficient. ✅ LED...

Meeting

1. Why did Lencho write a letter to God? Ans. Lencho wrote a letter to God because he had lost all his crops in the storm and had no other hope. He asked God for 100 pesos to survive and replant his crops, showing his strong faith that God would help him. 2. What did the postmaster think when he saw the letter to God? Ans. The postmaster was surprised and impressed by Lencho’s faith in God. He wanted to help Lencho, so he decided to collect money from his employees and friends to send to Lencho as if it came from God. 3. How much money did the postmaster collect for Lencho? Ans. The postmaster was able to collect a little more than half of what Lencho asked for. He sent Lencho 70 pesos instead of the 100 pesos. 4. What was Lencho's reaction when he received the money? Ans. Lencho was not surprised that he received money because he had complete faith in God, but he was angry when he saw that the amount was less than what he had requested. 5. Why did Lencho call the post office e...

Transportation and Excretion in Plants and Animals I. Transportation Transportation is the process by which substances absorbed or synthesized in one part of an organism are carried to other parts of its body. A. Transportation in Plants Plants require transportation for water, minerals, and food (synthesized during photosynthesis). Vascular Tissues: Plants have specialized vascular tissues for transportation: Xylem: Transports water and dissolved minerals from the roots to the aerial parts of the plant (leaves, stem). Movement is unidirectional (upwards). Composed of non-living cells: tracheids, vessels, xylem parenchyma, and xylem fibres. Driving forces for water movement: Root Pressure: Pressure developed in the roots due to continuous absorption of water, pushing water up a short distance. Effective for short plants. Transpiration Pull: The most significant force for tall plants. Water lost as vapour from the leaves (transpiration) creates a suction pull ...