Subject :NSO Class : Class 3
Subject :NSO Class : Class 7
Ans 1: (Master Answer)
Class : Class 1
Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.
Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.
The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.
1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m, and hence, the weight would increase.
2. If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m, and hence, the weight would decrease.
Post Your Answer
Subject :NSO Class : Class 7
Ans 1: (Master Answer)
Class : Class 1
Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.
Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.
The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.
1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m, and hence, the weight would increase.
2. If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m, and hence, the weight would decrease.
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Subject :NSO Class : Class 5
energy is being converted into 
energy.
Ans 7:
Class : Class 6
In the options, it is written wrong because it is mechanical , kinetic energy. Instead of that it should be muscular, kinetic energy
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Subject :NSO Class : Class 2
Post Your Answer
Subject :NSO Class : Class 5
Post Your Answer
Subject :NSO Class : Class 5
Ans 3: (Master Answer)
Class : Class 1
The correct answer is C.
Rhinoceros does not have scales on body while snake, lizard and fish have scales as body covering.
Ans 4:
Class : Class 1
Honestly, if you ask me,I chose snake as the answer because they can peel of their skin while the others can’t. So,Arumolzhi Ramesh I was thinking the same thing. But SOF and most of you guys say that the correct answer is C Rhinoceros as they do not have scales while the other three do. So it must be correct although I did not know lizards had scales on their bodies but as a matter of fact, they do so C must be the correct answer.
Ans 7:
Class : Class 9
The correct answer is CRhinoceros does not have scales on body while snake, lizard and fish have scales as body covering
Ans 8:
Class : Class 5
I chose snake too, so Biju Pappachan and Arumolzhi Ramesh, I have the same thought process- it sheds its skin.
Ans 12:
Class : Class 5
The correct answer is CRhinoceros doesn't have scales on their body while snake, lizard and fish have scales as body coveing
Ans 13:
Class : Class 9
Snake, lizard and fish have scales as body covering while rhinoceros doesn't. Hence the correct answer is C
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Subject :NSO Class : Class 4
Ans 1: (Master Answer)
Class : Class 1
To get a complete range of Olympiad Preparation Products (including previous years papers) log on to WWW.mtg.in, content partner for SOF Olympiads. For more details visit our website- details available on www.sofworld.org
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Subject :NSO Class : Class 6
Ans 2: (Master Answer)
Class : Class 1
The backbone or the vertebral column is a long, bony, rod–like structure, which extends from the base of the skull to the lower back. The animals which possess the backbone are called vertebrates and the ones which do not possess it are called invertebrates. Ant, spider, octopus, amoeba and starfish, are all invertebrates.So, the answer is B.
Amoeba does not lay eggs. It is an unicellular organism which divide by binary fission.
Ans 3:
Class : Class 8
why is everyone talking about animals?! I got a question about plants specifically complete and incomplete flowers. SOF PLEASE HELP ME HELP ME!!!!!!!!! AND THAT ADMIN IS COMPLETELY USELESS
Ans 4:
Class : Class 7
AND THE ANSWER IS AND THE ANSWER IS (A) MULLBERRY as the other three have all the four whorls
Ans 5:
Class : Class 9
The backbone or the vertebral column is a long, bony, rod–like structure, which extends from the base of the skull to the lower back. The animals which possess the backbone are called vertebrates and the ones which do not possess it are called invertebrates. Ant, spider, octopus, amoeba and starfish, are all invertebrates.So, the answer is B. Amoeba does not lay eggs. It is an unicellular organism which divide by binary fission.
Ans 13:
Class : Class 7
i agree with AYAAN VOHRA the admin is useless and the question is:which of the following is an example of incomplete flower?A) mulberryB) peaC) mustardD) hibiscusi chose (B) but sof said it's(A) and when i checked solutions it said" ." so I searched the forum but everyone(including the"admin")are talking about animals and amoeba.SOF PLS HELP!!!!!!!!!!!!
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Subject :NSO Class : Class 10
Ans 1:
Class : Class 5
Since the residue obtained was black in colour and we know that only Zinc and Copper on reacting with Iron give a black residue hence the answer is Option D
Ans 2: (Master Answer)
Class : Class 1
Here, the answer is D.
Black residue is obtained in test tubes I and III i.e., iron gets displaced in test tubes I and III. Therefore, metals P and R should be more reactive than iron.
No change is observed in test tubes II and IV hence, metals Q and S should be less reactive than iron.