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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 5

Ans 1:

Ira Jamsandekar from Shantiniketan, KOLHAPUR
Class : Class 10
Single pulley does not provide any mechanical advantage, it only changes the direction of force while an inclined plane provides mechanical advantage. This means the efforts required to life the same amount of load on an inclined plane is lesser than that by a single pulley. (Pulley provides mechanical advantage only if we use more than one pulley).Lesser the inclination more is mechanical advantage and lesser the effort. That means the correct answer should be 'D'

Ans 2:

Divyanshi from United international School, Bangalore
Class : Class 6
I agree with Ira not with Arnav because pulley does not lessen the effort.

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
B

Ans 4:

Samarth Sabari from GIIS, Singapore
Class : Class 9
B

Ans 5:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
d

Ans 6:

Arnav Agrawal from Emerald hieghts international school , Indore
Class : Class 5
B because if we use a rope to pull it will take a lot of effort, if we take a small or large inclined plane it will also take more effort because the load will slip down but in pulley we have to only pull the rope

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 5

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Aaryan from New horizons public school , Mumbai
Subject :NSO    Class : Class 8

Ans 1:

Nilanjana De from Delhi Public School North, Bengaluru
Class : Class 8
The answer is option c

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Priyam Bhattacharya from cambridge court high school, jaipur
Subject :NSO    Class : Class 5

Ans 1:

SATYA ande from TM Patel International School , Surat
Class : Class 5

Ans 2:

Revant Singh from Delhi Public School Raipur, Raipur
Class : Class 5
ans 1 i have got 5 times in level 2 and 9 times in level 1

Ans 3:

Swarit from Indian School Wadi kabir, Muscat
Class : Class 6
Of the three mediums, sound waves travel the slowest through gases, faster through liquids, and fastest through solids. Sound waves need a medium to pass through. Liquid molecules are not packed as tightly as solids, and gases are very loosely packed. The spacing of the molecules enables sound to travel much faster through a solid than a liquid or a gas. Sound travels about four times faster and farther in water than it does in air. That means the right answer is Option D.i am the smartest guy in sofi have got once international rank 1in level 2

Ans 4:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 5:

Mithul Pranav KB from Narayana Olympiad School Madipakkam, Chennai
Class : Class 5

Ans 6:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3

Ans 7:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7

Ans 8:

Aarav Jain from Lodha World School, Thane, Thane
Class : Class 6

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Harsh Sobti from the samhita academy, BLR
Subject :NSO    Class : Class 4

Ans 1:

Priya Kulkarni from Podar international school , Ratnagiri
Class : Class 4
B

Ans 2:

somesh from Centre point katol road, Nagpur
Class : Class 6
B

Ans 3:

Tavish Singh from Sanskriti School, Hyderabad
Class : Class 4
anser ccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 4:

vighneshwar from study hall, Lucknow
Class : Class 5
B

Ans 5:

Shreyansh Saha from Dps Megacity, Kolkata
Class : Class 5
The correct Option is b

Ans 6:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 10
option B

Ans 7:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Harsh , the answer is B not A

Ans 8:

bswarajya from Mount Litera Zee School, Bengaluru
Class : Class 5
B

Ans 9:

IAMLOST from ABC, Pune
Class : Class 8
option b is the correct answer

Ans 10:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
the answer is a a a a a a a a!!!!!!!!!!!!

Ans 11:

Vidhuran S from Euro School Whitefield, Bangalore
Class : Class 4
a

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Harsh Sobti from the samhita academy, BLR
Subject :NSO    Class : Class 4

Ans 1:

UMANG from spring dale college, Lucknow
Class : Class 7
The answer is option A

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is A .......

Ans 3:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 10
option C

Ans 4:

Subham Halder from Av academy, Kolkata
Class : Class 4

Ans 5:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5

Ans 6:

Pragnay Priyadarshi from Quantum Leap School, HYDERABAD
Class : Class 7
c is the right option

Ans 7:

shreyash rawat from podar international school, pune
Class : Class 8
the answer is[ A]

Ans 8:

Shreyansh Saha from Dps Megacity, Kolkata
Class : Class 5
Option c

Ans 9:

vighneshwar from study hall, Lucknow
Class : Class 5
C

Ans 10:

Riddhiman Bose from Don Bosco School, Kolkata
Class : Class 5

Ans 11:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
snowhite corrrect

Ans 12:

SS from meridian, hyderabad
Class : Class 5
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

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Karangat house from Navy Children School, Payyannur
Subject :NSO    Class : Class 3

Ans 1:

Kavya agrawal from OP Jindal school, Raigarh
Class : Class 3

Ans 2:

k tagore from montessori school, KURNOOL
Class : Class 3

Ans 3:

Saathvik Sriram from euroschool whitefield, Bangalore
Class : Class 5
question is incomplete

Ans 4:

Kavya agrawal from OP Jindal school, Raigarh
Class : Class 3
Question in complete

Ans 5:

k tagore from montessori school, KURNOOL
Class : Class 3
question incomplete

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Swastik from st marys school, new delhi
Subject :NSO    Class : Class 5

Ans 1:

Riya from Bhavan Vidyalaya, Chandigarh
Class : Class 8
Q should be water salt and P should be pure water

Ans 2:

Anusha from LBS School , Kota
Class : Class 10

Ans 3:

Kaavyy boolani from Cambridge Court World School, Jaipur
Class : Class 6
p should be pure water and q should be impure water so kindly correct the options

Ans 4:

Anvi Ranade from ,
Class : Class 1
Yes. Even I think that sof here has made a mistake . P and Q should be interchanged . I am reporting this as an error

Ans 5:

Priyam Bhattacharya from cambridge court high school, jaipur
Class : Class 6
yes you are right

Ans 6:

Anusha from LBS School , Kota
Class : Class 10

Ans 7:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 10
dumb SOF

Ans 8:

Kaavyy boolani from Cambridge Court World School, Jaipur
Class : Class 6
correct P and Q in the given picture

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Diti Sharma from Amity International School, Noida
Subject :NSO    Class : Class 8

Ans 1:

arnav raj sharma from gulibulium school, new york
Class : Class 8
gallium is solid before 29.73 so mention the tempereture

Ans 2:

khushi Joshi from Svkm , Mumbai
Class : Class 10
But gallium is in solid state at room temperature (20oC)

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keosha jain from saint francis convent intercollege , jhansi
Subject :NSO    Class : Class 8

Ans 1:

Akshara from NPS, Bengaluru
Class : Class 8
Completely agree. ????

Ans 2:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
it says that b is correct and then in soln. it says b is wrong

Ans 3:

SANVI from D PS VADODARA, Vadodara
Class : Class 9

Ans 4:

Archisman Biswas from Santipur Municipal High School, Nadia
Class : Class 9
In the explanation it is given that option b is wrong. Then how does the OPTION B become the right one ?

Ans 5:

ANUSHKA SHARMA from CAMBRIDGE COURT WORLD SCHOOL, JAIPUR
Class : Class 8

Ans 6:

Genius Sahaji from BTS Bhopal, BHOPAL
Class : Class 8
me too its written wrong and they are ignoring the reviews and comments and errors

Ans 7:

Naivedya Moondra from Lake Montfort, BANGALORE
Class : Class 8
Yes. Why does it say that?

Ans 8:

Akshara from NPS, Bengaluru
Class : Class 8

Ans 9:

Anusha from LBS School , Kota
Class : Class 10

Ans 10:

Saransh Sharma from St. Anselm's English medium School, Sawai Madhopur
Class : Class 8
In solution it is written B is incorrect then HOW THE OPTION 'B' IS COREECT????

Ans 11:

Palchin from Naval public school, Uran
Class : Class 8
in the solution it says that option b is wrong then it says that that the correct option is option b please explain

Ans 12:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
why does it say b is wrong(and c is correct) in the solution and that b is the correct answer?Isn't it C?

Ans 13:

Akhil Budithi from Kennedy high the global school , Hyderabad
Class : Class 8

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