National Science Olympiad Forum By SOF Olympiad Trainer - Page 606

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Nakul Zutshi from APJ Noida, Noida

Subject :NSO Class : Class 6

The length and breadth of a playground are 75 m 20 cm and 34 m 80 cm respectively. How long will a boy take to go three times round the field if he walks at the rate of 1.5 m per second?

(A) 7 mins 20 secs

(B) 12 mins 14 secs

(D) 16 mins 30 secs

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shivan iyer from dr pillai global academy, MUMBAI

Subject :NSO Class : Class 4

The figure below shows the shapes of Moon as seen from Earth on different nights. Which one of the following figures shows the correct shape of Moon on 21^st November?

A
B
C
D

confusers

Ans 1:

Aaron from universal, mumbai

Class : Class 5

how do you know it is half moon?????????

Ans 2:

Rajveer Santosh Mulik from Rims International School, Pune

Class : Class 4

Ans 3:

Bhavya Jain from K R Mangalam World Scholl, GHAZIABAD

Class : Class 4

how is C the answer

Ans 4:

shivan iyer from dr pillai global academy, MUMBAI

Class : Class 4

Ans 5:

shalini mittal from DPS Greater Noida, Greater noida

Class : Class 4

Ans 6:

Rishab Aravind from Vidya Mandir Senior Secondary School , Chennai

Class : Class 4

Ans 7:

Anika S Kumar from Alphabets International school , Chennai

Class : Class 7

Please explain

Ans 8:

Chinmay S Amboori from Adani Public School, Mundra

Class : Class 6

There is difference of 2 days in each face as per the given drawing

Ans 9:

ikshika kumar from MVN SCHOOL, FARIDABAD

Class : Class 7

C) Half moon

Ans 10:

Rudra Jindal from DPS Noida, Noida

Class : Class 4

Ans 11:

Aadya from Vidyashilp , Bangalore

Class : Class 10

please can you give a detailed information for the answers because i could not understand the question properly

Ans 12:

shivan iyer from dr pillai global academy, MUMBAI

Class : Class 4

can you tell me all the ans.

Ans 13:

Rudra Jindal from DPS Noida, Noida

Class : Class 4

I KNO

Ans 14:

Shailaja Divakar from Chennai public school global school, London

Class : Class 6

I do not understand why.

Ans 15:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Please explain why c is right answer

Ans 16:

shubhavi Dhondge from NPS, Banagalore

Class : Class 9

please clarify the answer

Ans 17:

ranak sharma from Cambridge Court World School, Jaipur

Class : Class 5

The answer is D

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adrijab from DELHI PUBLIC SCHOOL, PANIPAT REFINERY, Panipat

Subject :NSO Class : Class 9

WFrom a tower of height h a particle is thrown vertically upwards with a speed v. The time taken by the particle, to hit the ground is n times that taken by it to reach the highest point of its path. Then speed(u) of the particle is equal to

A
B
C
D

View All Answers (2)

Ans 1:

aditya apurva from DAV public School, Duttnagar

Class : Class 9

anyone explain the solution please

Ans 2: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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RIDHASEN PRIYASEN SHAH from The Rajkumar College, Rajkot, Rajkot

Subject :NSO Class : Class 5

The diagram below shows the path taken by a ball when Sundram kicks it.
The potential energy of the ball is highest at _______.

A P
B Q
C R
D S

View All Answers (16)

Ans 1:

Niveideeta Cour from Suncity World School, Gurgaon

Class : Class 5

totally agree with you Anika

Ans 2:

Hari Govind from Delhi Public School Chandigarh , Chandigarh

Class : Class 6

answer is q because higher the ball the more potential energy it has. Potential energy=height into mass into gravity

Ans 3:

Anika Saha from New Town School, KOLKATA

Class : Class 6

can you please explain why the potential energy is the highest at Q. it should be highest at P when the ball is waiting to be kicked

Ans 4:

S from , JAJAPUR

Class : Class 4

Good evening sir, I had a doubt that potential energy is possible when the objects are in rest.

Ans 5:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ishit Rai , you are seeing the answer and telling and trying to be smart . It should be P as the ball has not moved yet here and is waiting to be kicked . At Q , the kinetic energy is the highest and not the potential energy . SOF has answered this question wrongly . Understood ? Samajh aaya ? Bujhte parli ? Mansalayo ?

Ans 6:

Aarush from Podar, Mumbai

Class : Class 10

Ans 7:

Ayan from Oakridge International School, Bangalore

Class : Class 5

the answer should be p. It's potential energy would be highest then

Ans 8:

dheer thakkar from k v ongc panvel, panvel

Class : Class 5

Ans 9:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata

Class : Class 7

i want the explanation of why it will be Q. It should be P.

Ans 10:

D Murari from Indian School of Excellence, Bangalore

Class : Class 9

Ans 11:

pallavi kaila from ,

Class : Class 4

Ans 12:

Shubham Parab from PPS, Mumbai

Class : Class 8

Can somebody please explain why Q should be the answer, i think it is P.

Ans 13:

ishit from EUROSCHOOL THANE, THANE WEST

Class : Class 7

Shubham Parab potential energy is the highest at the highest height so the answer should be Q and potential energy=mg.h

Ans 14:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Sorry , because I had speak in 4 languages i.e. English , Hindi , Bengali and Malayalam !!!!!!!!!!!!!!

Ans 15: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Ans 16:

somesh from Centre point katol road, Nagpur

Class : Class 6

it should be P

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Srijan Ingle from Delhi Public School, Balcotownship, Korba

Subject :NSO Class : Class 8

Find the minimum number of straight lines required to draw the given figure.

A 11
B 15
C 18
D 14

i think it will be 11(if we don't count the lines used to make the cube twice)

View All Answers (1)

Ans 1:

Harshit from Army Public School, Lucknow

Class : Class 9

Hi friend. The ans is (D) 14

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Nivika from Shri Ram Global School, Bangalore

Subject :NSO Class : Class 3

Match the multiplications given in Column-I with their results in Column-II.

(A) (a) - (iii); (b) - (i); (c) - (ii); (d) - (iv)

(B) (a) - (iii); (b) - (i); (c) - (iv); (d) - (ii)

(D) (a) - (iii); (b) - (iv); (c) - (i); (d) - (ii)
I got it wrong, but, my dad told me a trick to get it right.

View All Answers (2)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

Ans 2:

from , Chennai

Class : Class 3

this question is very hard for class 3

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Mannat Verma from Vivek High School , Chandigarh

Subject :NSO Class : Class 4

Refer to the given Venn diagram and select the option that correctly identifies P, Q, R and S.

	P	Q	R	S
A	Steel tiffin box	Wooden pen stand	Plastic jar	Aluminium foil
B	Spectacles	Butter paper	Wooden door	Raincoat
C	Mirror	Plastic tumbler	Glass bangle	Eraser
D	Frosted glass	Cardboard	Rubber band	Wooden spoon

View All Answers (2)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

Ans 2:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi

Class : Class 7

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Mannat Verma from Vivek High School , Chandigarh

Subject :NSO Class : Class 4

Select the INCORRECT match from the following.

AVitamin A-Fish oil- Keeps eyes healthy
BIron-Beetroot-Helps in formation of blood
CPotassium - Lemon - Necessary for healthy gums
DCalcium - Milk - Makes our bones and teeth strong

View All Answers (5)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

Ans 2:

Ibrahim Aslam from uttam, Ghaziabad

Class : Class 5

Ans 3:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi

Class : Class 7

Ans 4:

Ibrahim Aslam from uttam, Ghaziabad

Class : Class 5

The solution is not correct!!ð¥

Ans 5:

Rajveer Santosh Mulik from Rims International School, Pune

Class : Class 4

C IS THE CORRECT ANSWER BECAUSE POTASSIUM IS NOT PRESENT IN LEMON.

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Devyani bansal from Blue bell school international, New Delhi

Subject :NSO Class : Class 3

The given box contains some materials.

Which of these materials are bad conductors of heat?

A 1 and 2
B 2 and 3
C 3 and 4
D 2, 3 and 4

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

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ADWIKA from DAV, FARIDABAD

Subject :NSO Class : Class 7

When you put a metal key into its metal lock, you find the key is too tight. Which of the following methods will you adopt to make the key fit properly?

A Heating the key and lock both
B Cooling the key and heating the lock
C Heating the key and cooling the lock
D Cooling the key and lock both

on heating metal contracts and on cooling metal expands

View All Answers (6)

Ans 1:

Shlok from Tomoae , Amravati

Class : Class 7

yep it should be B . check your description its wrong . metal expands on heating and vice versa. plz help me with my questions too

Ans 2:

Dhruvan G from Indian School Al Ghubra, Muscat

Class : Class 8

You got the point vice versa. It has to be (B)

Ans 3:

Kartik Saxena from Mercy Memorial School, Kanpur

Class : Class 7

It's B I am sure

Ans 4:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai

Class : Class 9

it has to be b

Ans 5:

Sourasis kundu from St.agnes higher secondary School, Kharagpur

Class : Class 6

Ans 6:

srinath from sri gowthami, Rajahmundry

Class : Class 7

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