Rounak Khanna

EduRev Class 9

Rounak Khanna
EduRev Class 9
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Discussed Questions

Lencho's faith in g?

Abhishek Rane answered  •  3 weeks ago
Lencho's Faith in God
Lencho, the protagonist of the story "The Letter to God," showcases an unwavering belief in God, which plays a crucial role in his life.
1. Trust in Divine Intervention
 
- Lencho believes that God is always watching over him and will provide for his needs.
- Despite facing hardships, such as a poor harvest, he remains hopeful that
... more
Abhishek Rane upvoted   •  4 weeks ago

कपड़े में मुँह को छिपाए सिर को घुटनों पर रखकर कौन रो रहा था ?
  • a)
    लेखक
  • b)
    बुढ़िया
  • c)
    भगवाना
  • d)
    पड़ौसिन
Correct answer is option 'B'. Can you explain this answer?

Imk Pathshala answered
कपड़े में मुँह छिपाए और सिर को घुटनों पर रखकर रोने वाली बुढ़िया थी। वह अपने बेटे की मृत्यु के कारण दुखी थी और उसकी अवस्था बहुत दयनीय थी।

Abhishek Rane upvoted   •  Feb 04, 2025

Assertion (A): The Nazi regime used carefully crafted language and media to propagate their ideologies.
Reason (R): The Nazis avoided using direct terms like 'kill' or 'murder' in their official communications, employing euphemisms like 'special treatment' or 'final solution' instead.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false
  • d)
    If both Assertion and Reason are false
Correct answer is option 'B'. Can you explain this answer?

Let's Tute answered
  • The Assertion is true since the Nazi regime indeed utilized language and media meticulously to spread their ideologies.
  • The Reason is also true as the Nazis refrained from direct terms like 'kill' or 'murder', opting for more euphemistic language.
  • However, Reason does not directly explain why the Nazis used carefully craf... more

लेखक शाम के समय क्या कर रहा था?
  • a)
    खेल रहा था
  • b)
    बेर तोड़ कर खा रहा था
  • c)
    पढ़ रहा था
  • d)
    आम तोड़ कर खा रहा था
Correct answer is option 'B'. Can you explain this answer?

Abhishek Rane answered  •  Jan 28, 2025
Understanding the Correct Answer: Option B
In this section, we will explore why option 'B' is the correct answer, providing a detailed explanation of the reasoning behind it.
Contextual Background
- It is essential to first understand the context or subject matter of the question.
- Having a clear grasp of the topic helps anticipate why option 'B' stands out among
... more
Abhishek Rane upvoted   •  Jan 23, 2025

Neither Ramesh nor his friends _________ hurt
  • a)
    are
  • b)
    were
  • c)
    was
  • d)
    have
Correct answer is option 'B'. Can you explain this answer?

Flembe Academy answered
were
In this sentence, the verb "hurt" is in the past tense and refers to an action that has already happened. The subject of the sentence is "Ramesh and his friends," which is a group of people. When a verb is in the past tense and refers to a group of people, it should be conjugated in the plural form, which is "were."

Abhishek Rane upvoted   •  Jan 13, 2025

Find the length of canvas 1.1 m wide required to build a conical tent of height 14 m and the floor area 346.5 m2, is
  • a)
    665 m
  • b)
    525 m
  • c)
    490 m
  • d)
    860 m
Correct answer is option 'B'. Can you explain this answer?

Nk Classes answered
Solution
Let r= radius of the base.
Given area = 346.5
π×r2 =346.5
r2 = 346.5×722 = 4414
r = 212
l = √r2+h2=√4414+142
l = 352 m
The area of canvas = surface area of the cone =πrl = π×212×352 m2 = 33×352 m2
Given length of canvas = 1.1 m
Let width = x
Area of canvas = 1.1x
So, 1.1 x=33×352
x=33×352×1.1 = 525 m

Abhishek Rane upvoted   •  Jan 06, 2025

A load of 50 kg is pulled upward by 5 m. The work done by the external force is (g = 10 m/s2)
  • a)
    250 J
  • b)
    - 2500 J
  • c)
    - 250 J
  • d)
    2500 J
Correct answer is option 'B'. Can you explain this answer?

Nk Classes answered
Given, the mass of the object m=100 kg, height h=5 m and g = - 10 ms−2. ( Force is pulled upward acting opposite to gravity i.e g is negative)
Work done = potential energy
We know work done W=mgh
So, W = 50 × - 10 × 5 =  - 2500J

Thermodynamics basics?

Abhishek Rane answered  •  Dec 22, 2024
Introduction to Thermodynamics
Thermodynamics is the branch of physics that deals with heat, work, and energy. It provides a framework for understanding how energy is transferred and transformed in physical systems.
Key Concepts
- System and Surroundings:
- A system is the part of the universe we are studying, while the surroundings are everything outside
... more

जिस पर विपदा आती है वह व्यक्ति कहाँ आता है?
  • a)
    अयोध्या
  • b)
    पंचमढ़ी
  • c)
    पंचवटी
  • d)
    चित्रकूट
Correct answer is option 'D'. Can you explain this answer?

Abhishek Rane answered  •  Sep 26, 2024
Understanding the Question
The question revolves around a specific topic or concept that has not been provided. However, the correct answer is stated to be option 'D'. To explain why this is the case, we will assume it relates to a common subject area in Class 9, such as mathematics, science, or social studies.
Analyzing Option 'D'
- Option 'D' is considered correct ba
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Both water and energy are integral parts of the human body. By weight about 60% of an adult's human body is water and dehydration is one of the biggest single killers of children in the modern world. Life without water is unthinkable.
The human body needs its daily intake of food to meet its energy requirements, which according to the Food and Agriculture Organisation of the United Nations is about 1,800 kcal per day. Life without energy is equally unthinkable.
The energy that we take in through food again depends, amongst other things, on the water for agriculture and often that water is pumped with electrical or other forms of energy. The interdependence of energy and water is evident.
The world at large seeks both water and energy security. The Worldwatch Institute estimates that about 1.1 billion people (one-fifth of the world population) live in areas of physical water scarcity and another 1.6 billion are facing economic water shortage (when existing water sources cannot be used because of a lack of investment in water-related infrastructure). We will probably have a world population of 9 billion by 2050 and this will put further stress on the water sourcing and supply systems. Here again, the connection between energy and water is evident: globally about 70% of water consumption is for the agricultural sector. No water, no food, no energy.
Actions needed on the waterfront include a reduction in water usage for agriculture (pump efficiencies, drip irrigation instead of flood irrigation, change in crop patterns), recycling of water, extensive rainwater harvesting programmes, stoppage of run-offs and water pollution.
We need to remind ourselves that the fossil-based energy that we rely on so much for almost everything we do is stored solar energy. And while the sun took over 150 million years to store its energy in the form of fossil fuels, we are busy discharging that huge solar battery in a matter of a few hundred years.
Q. We get ________ from food.
... more

Abhishek Rane answered  •  Sep 26, 2024
Understanding Energy from Food
Food is essential for human survival, and one of its primary roles is to provide energy. Here’s a breakdown of why the correct answer is option 'A'—energy.
1. Energy Requirements
- The human body requires energy to perform essential functions such as:
- Breathing
- Digestion
- Physical activity
- According to the Fo
... more

Read the source given below and answer the questions that follow:
We noted above that in a democratic election people should have a real choice. This happens only when there are almost no restrictions on anyone to contest an election. This is what our system provides. Anyone who can be a voter can also become a candidate in elections. The only difference is that in order to be a candidate the minimum age is 25 years, while it is only 18 years for being a voter. There are some other restrictions on criminals, etc., but these apply in very extreme cases. Political parties nominate their candidates who get the party symbol and support. Party’s nomination is often called a party ‘ticket’. Every person who wishes to contest an election has to fill a ‘nomination form’ and give some money as ‘security deposit’.
Recently, a new system of declaration has been introduced on direction from the Supreme Court. Every candidate has to make a legal declaration, giving full details of:
Serious criminal cases pending against the candidate;
  • Details of the assets and liabilities of the candidate and his or her family; and
  • Educational qualifications of the candidate.
    This information has to be made public. This provides an opportunity to the voters to make their decision on the basis of the information provided by the candidates.
    Q. Every candidate who wishes to contest an election has to fill a ................ form.
    ... more

    Abhishek Rane answered  •  Sep 26, 2024
    Understanding the Question
    The question asks about the specific form that every candidate must fill out in order to contest an election. The options provided include nomination, declaration, employment, and bank.
    Correct Answer: Nomination Form
    The correct answer is option 'A', which is the "nomination form." Here’s why:
    Definition of a Nomination Form
    ... more

    What is 2+2
    answer in brief?

    Abhishek Rane answered  •  Sep 26, 2024
    Understanding the Basics of 2 + 2
    The equation "2 + 2" is one of the most fundamental concepts in arithmetic. It represents a simple addition operation where two numbers are combined to find their total.
    Breaking Down the Addition
    - Definition of Addition:
    - Addition is the process of calculating the total of two or more numbers or amounts.
    - Comp
    ... more:
    - The numbers involved in this equation are called "addends."
    - Here, the two addends are both 2.
    Performing the Calculation
    - Step 1: Start with the first number (2).
    - Step 2: Add the second number (2) to the first number.
    - Step 3: Combine them:
    - 2 + 2 = 4
    Conclusion
    - Final Answer:
    - The result of 2 + 2 is 4.
    - Real-World Application:
    - This basic operation is essential in everyday life, from budgeting to cooking and beyond.
    By understanding the principles of basic arithmetic through examples like 2 + 2, students can build a strong foundation for more complex mathematical concepts in higher grades.

    Using part 3 find (x²-y²)of x-y=23?

    Abhishek Rane answered  •  Sep 07, 2024
    To find \( x^2 - y^2 \) from the equation \( x - y = 23 \), we can utilize the difference of squares formula and some algebraic manipulation.
    Understanding the Difference of Squares
    - The difference of squares formula states that:
    \[ x^2 - y^2 = (x - y)(x + y) \]
    Using the Given Information
    - From the equation \( x - y = 23 \), we already have one part of o
    ... more

    ?

    Abhishek Rane answered  •  Jul 25, 2024
    The poet chose the road less traveled by.
    - The Road Less Traveled by: In the poem "The Road Not Taken" by Robert Frost, the poet chooses the road less traveled by. This decision signifies the poet's desire to take a unique and less conventional path in life.
    - Symbolism of the Road: The road symbolizes choices and opportunities in life. The poet reflects on the decision
    ... more

    Is uniformly accelerated motion uniform motion

    Abhishek Rane answered  •  Jul 25, 2024
    Uniformly Accelerated Motion vs. Uniform Motion
    Uniformly accelerated motion and uniform motion are both types of motion but with distinct characteristics. Let's break down the differences between the two:

    Uniformly Accelerated Motion:
    - In uniformly accelerated motion, the velocity of an object changes by the same amount in equal intervals of time.
    - The ac
    ... more
    Abhishek Rane asked   •  Oct 17, 2023

    The total number of neutrons in zinc (z = 30) with mass number 70 is -
    • a)
      40
    • b)
      20
    • c)
      36
    • d)
      38
    Correct answer is option 'A'. Can you explain this answer?

    Nk Classes answered

    To determine the number of neutrons in an atom, we need to subtract the atomic number from the mass number.
    Given:
    Atomic number (Z) = 30
    Mass number = 70
    Step 1: Determine the number of protons
    The atomic number (Z) represents the number of protons in an atom. In this case, the atomic number of zinc is 30, so there are 30 protons.
    Step 2: D
    ... more

    Abhishek Rane asked   •  Oct 03, 2023

    Directions: Fill in the blanks with suitable prepositions.
    You should always ______ important files.
    • a)
      back up                             
    • b)
      back out     
    • c)
      Back out of     
    • d)
      Back for ​
    Correct answer is option 'A'. Can you explain this answer?

    Avinash Patel answered
    Explanation:

    The correct preposition to use in this sentence is "back up".

    Reasoning:

    The phrase "back up" means to make a copy or duplicate of something for safekeeping or as a precautionary measure. In this context, it is important to back up important files to ensure that they are not lost or damaged.

    Answer:

    The correct preposition to use in the sentence is "back up".

    Abhishek Rane asked   •  Jul 24, 2023

    Are there any specific guidelines or marking schemes provided along with the syllabus for CBSE Class 9?

    Tanishq Patel answered
    Guidelines and Marking Schemes for CBSE Class 9 Syllabus

    Background:
    The Central Board of Secondary Education (CBSE) provides guidelines and marking schemes for various subjects in Class 9. These guidelines and marking schemes help teachers and students understand the structure and expectations of examinations. They provide detailed information on the distribution of marks, types o
    ... more

    Abhishek Rane asked   •  Apr 05, 2022

    Cell wall of which one of these is not made up cellulose?
    • a)
      Mango tree
    • b)
      Hydrilla
    • c)
      Bacteria
    • d)
      Cactus
    Correct answer is option 'C'. Can you explain this answer?

    Cell wall of bacteria is not made up of cellulose.

    Explanation:
    The cell wall is a rigid layer that surrounds the cell membrane of plants, bacteria, fungi, and some protists. It provides structural support and protection to the cell. In plants, the cell wall is mainly composed of cellulose, a complex carbohydrate made up of glucose units bonded together.

    ... more

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