Solution of Class 9 Devjyoti Bravia Worksheet 1

Introduction:
Devjyoti Bravia Worksheet 1 is a set of questions designed for Class 9 students to test their understanding of various topics in Mathematics, Science, English, and Social Science. The solutions to these questions are listed below.

Mathematics:
1. Find the value of x if 3x + 4 = 13
Solution:
3x + 4 = 13
3x = 13 - 4
3x = 9
x = 3

2. Simplify the expression: (2x + 3y) - (x - 2y)
Solution:
(2x + 3y) - (x - 2y) = 2x + 3y - x + 2y = x + 5y

Science:
1. Define the term 'force'
Solution:
Force is an influence that causes an object to undergo a change in motion or direction. It can be a push or a pull and is measured in Newtons (N).

2. Explain the difference between weight and mass.
Solution:
Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity. Mass is measured in kilograms (kg), while weight is measured in Newtons (N).

English:
1. Identify the tense of the following sentence: She will be singing at the concert tonight.
Solution:
Future continuous tense

2. Define the term 'adverb'
Solution:
An adverb is a word that modifies a verb, adjective, or other adverb. It describes how, when, where, or to what extent an action is performed.

Social Science:
1. Name the two main types of democracy.
Solution:
Direct democracy and representative democracy.

2. Define the term 'constitution'
Solution:
A constitution is a set of fundamental principles and rules by which a country or organization is governed. It outlines the powers and duties of the government and guarantees certain rights and freedoms to the citizens.

Conclusion:
The solutions to the Class 9 Devjyoti Bravia Worksheet 1 have been listed and explained in detail above. Students can use these solutions to check their answers and improve their understanding of the topics covered in the worksheet.

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