National Science Olympiad Forum By SOF Olympiad Trainer - Page 845
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CHANDRA MOHAN REDDY from dps harni, Vadodara
Subject :NSO    Class : Class 8

Ans 1:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 6
Concave mirrors are used in solar cookers. as concave mirrors are converging, the are used to concentrate the sun's heat on the utensil.

Ans 2:

SUBRATA MUKHERJEE from ,
Class : Class 7
I think plane mirrors can also do it to some extent but more prominent is concave

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
the answer is B

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Nipun sharma from gail dav public school, Auraiya
Subject :NSO    Class : Class 7

Ans 1:

Senthil Kumar from ARB INTERNATIONAL SCHOOL, Coimbatore
Class : Class 7
I THINK SO ANSWER IS C

Ans 2:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
ITS OPTION "C" AS SOME OF THE LIGHT REFRACTS IN WATER AND AIR

Ans 3:

anirudh_suresh@rocketmail.com from bangalore international academy, Bengaluru
Class : Class 7
B IS THE CORRECTONE. BELIVE ME

Ans 4:

Dr D Martin from Harvard School pf Physics, Boston
Class : Class 1
C is the correct answer. I teach Physics. The angle of incidence entering and exiting is the same due to the same medium.

Ans 5:

KISHORE KUMAR E from MAHARISHI INTERNATIONAL RESIDENTIAL SCHOOL, SUNGUVARCHATHIRAM
Class : Class 9
ANSWER a. Refraction of light and the direction of refraction depends upon the density of the object because it reduces the speed of light.the Flint glass is more denSer than water and the air is no too denSer so there will be no refraction in the caSe of air. Therefore light refracts in water and the glass. ANOTHER REASON!: Light travalS on a straight line .

Ans 6:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
Its "c" because some of the light rays get refracted

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Arka Chakraborty from St. Patrick's Academy, Bengaluru, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2

Ans 2:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9

Ans 3:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
question is wrong

Ans 4:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2
??????????????what?????????????????what???????????

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Dev Narayan Vinu from St. Thomas Residential School, Thiruvananthapuram
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 2:

Tejesh VB from GEMS New Millennium School, Al Khail, Dubai
Class : Class 8

Ans 3:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi
Class : Class 7
C

Ans 4:

niyati from kv 2, delhi
Class : Class 4

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rittik singh from ,
Subject :NSO    Class : Class 5

Ans 1:

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Class : Class 7

Ans 2:

Sharad Jain from Presidium, Ghaziabad
Class : Class 5
Hello ! It is C as when the smell is spread , People notice it at some other room . It's the same with perfume .

Ans 3:

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Class : Class 7
yes,Sharad you are right but can you explain

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BHAVYA GOYAL from Venkateshwar International School Sec 10 Dwarka New Delhi, New Delhi
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C. Because, after May, the consumption keeps getting lower which indicates that they started saving water.

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Jyothi from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

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Kushagra Shukla from Presidium dwarka, New Delhi
Subject :NSO    Class : Class 4

Ans 1:

NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi
Class : Class 9

Ans 2:

Santina Suzanne from owis, bangalore
Class : Class 4
d is ans because pulley go up and down

Ans 3:

AniAdi from Cambridge public school, Bangalore
Class : Class 5
Screw is used to fasten things and not really used to lower and raise things.. Isnt D incorrect too?

Ans 4:

Santina Suzanne from owis, bangalore
Class : Class 4
what is master ans

Ans 5:

Ishan Kapilbhai Barochiya from Mayoor Private School , Abu Dhabi
Class : Class 8
no chairs also use screws to go up nd down

Ans 6:

Ayaansh Singhal from Pinewood School, Saharanpur
Class : Class 8
please give the master ans

Ans 7:

Priyanka Dahiya from St. Theresa's senior secondary Convent school , Karnal
Class : Class 5
fork can be considered as both 'Lever' and 'wedge'. answer should be D.

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Jeronee from Christwood School, PERUMBAKKAM
Subject :NSO    Class : Class 3

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Yes, the figure is not clearly printed and the options are not too clear .

Ans 2:

Aarush from CA, Bengaluru
Class : Class 5
The figure is not clear. The options have not been printed correctly.

Ans 3:

ADHRIT SINGH from RPM ACADEMY, Gorakhpur
Class : Class 1
the figure is not printed correctly

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9

Ans 5:

Isra Fathima from sophia high school, Bengaluru
Class : Class 7
the figure markings are not clearly printed.

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Krethick Ravichandran from FIITJEE GLOBAL SCHOOL , India
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

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