National Science Olympiad Forum By SOF Olympiad Trainer - Page 448
  1. Home
  2. /  Forum

User Forum

Ask Your Question
CHIRAG KHORIA from EVERGREEN PUBLIC SCHOOL, MAYNAGURI
Subject :NSO    Class : Class 5

Ans 1:

likith from Delhi Public School International School, Singapore
Class : Class 7

Ans 2:

Swastik from st marys school, new delhi
Class : Class 6
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Ans 3:

from , rajahmundry
Class : Class 2
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Ans 4:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
ha you have copied

Post Your Answer

aikya from psbn, bangalore
Subject :NSO    Class : Class 6

Ans 1:

Kushal from Chirec, Hyderabad
Class : Class 7
The answer is d

Post Your Answer

Aksh singh from The asian school, Dehradun
Subject :NSO    Class : Class 7

Ans 1:

Navyansh Garg from Saupin, Chandigarh
Class : Class 8

Ans 2:

medhamshu8 from sri chaitanya, hyderabad
Class : Class 8
statement 1:the roots of the trees of the forest hold the soil and prevent soil erosion. (true) statement 2:in forest the leaves of the trees overlap each other and form a canopy and when the rain falls on the leaves the leaves absorb the rain water and some water flows from the branches and remaining water fall on the small shrubs and it absorbs the water and the left over water is then absorbed by the soil so no floods will occur in the forests. (true) option B:statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1

Post Your Answer

aikya from psbn, bangalore
Subject :NSO    Class : Class 6

Ans 1:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Option A states that I and IV are reversible changes????!!?!?!?!?

Ans 2:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
IV is burning of wood which is an irreversible change. How can it be D??

Ans 3:

Falguni from Navkis, Bangalore
Class : Class 7
Yeah,the answer is D

Post Your Answer

Vedika from bal bharti public school, Delhi
Subject :NSO    Class : Class 4

Ans 1:

ARNAV BANSAL from Arwachin International School Pilkhuwa, PILKHUWA
Class : Class 6

Ans 2:

Baibhab Mishra from City Pride, pune
Class : Class 4
Hydroelectricity can be used in things like fans. Here , Electrical energy(Hydroelectricity)----->changes into----->Mechanical energy(fan)

Ans 3:

ARNAV BANSAL from Arwachin International School Pilkhuwa, PILKHUWA
Class : Class 6

Ans 4:

Divyamsh from The Sky World School, Panchkula
Class : Class 5
It should other way around as in hydroelectricity generation mechanical gets converted to electrical

Ans 5:

Devank Jain from HBK High School, Ahmedabad
Class : Class 4
can anyone explain how chemical energy related to grass

Post Your Answer

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Subject :NSO    Class : Class 6

Post Your Answer

Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 7

Ans 1:

Saanvi from Dehli Public School , Gurugram
Class : Class 4

Ans 2:

Mrittika Roy from DPS Ruby Park, Kolkata
Class : Class 6
there are only 4 items in each option, but there are five blanks

Post Your Answer

Chanpartap from The British Co Ed High School , Patiala
Subject :NSO    Class : Class 7

Post Your Answer

Spandan Pradeep Pathare from Takshila school , Ahmednagar
Subject :NSO    Class : Class 7

Post Your Answer

Falguni from Navkis, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

SKIyer from CNS, Mumbai
Class : Class 6

Ans 2:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 10
this was ez...

Ans 3:

Satvik Pattanaik from GreenwoodHigh, bangalore
Class : Class 6

Ans 4:

Vedant from DON BOSCO, CHENNAI
Class : Class 2
whats displacement

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Vedant , Displacement is the shortest distance from the initial point and the final point of a moving body

Ans 6:

Ritabrata Das from OPJS, Angul
Class : Class 7

Post Your Answer