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Kartikeya Singh from DPS Katra, Katra
Subject :NSO    Class : Class 3

When astronauts are out in the space, either they communicate using radios or talk to one another by touching their helmets. Which of the following statements holds true about communication in space?
1.Sound is a vibration that cannot travel through vacuum.
2.Sound vibrations can travel through the material of the helmet to the other.
3.Radiowaves can travel through vacuum.
4.Helmets have speakers built in them which produce sounds when touched.

A4 only
B2 and 3
C1, 2 and 3
D1 and 4


Ans 1:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG
Class : Class 3
A

Ans 2:

SAMRIDDHA PANDA from MONFORT SENIOR SECONDARY SCHOOL, BARUIPUR
Class : Class 5
D

Ans 3:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
i am confused

Ans 4:

Mohi from Vibgyor, Bangalore
Class : Class 1
C

Ans 5:

Kartikeya Singh from DPS Katra, Katra
Class : Class 5
ANS A is correct

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Nilanjana De from Delhi Public School North, Bengaluru
Subject :NSO    Class : Class 8

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ANUP from Bhavans Vidya Mandir Elamakkara, Kochi
Subject :NSO    Class : Class 6

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arya navare from Saint ursula school, kankavli
Subject :NSO    Class : Class 5

Nidhi pushed the plunger of syringe completely and dipped its needle in water. Then she slowly pulled the plunger while its needle was still immersed in water. Select the correct option regarding this.

A Water will move in the syringe when she pushed the plunger down due to air pressure.
B When she pushed the plunger down all the air moved out creating an empty space in syringe.
C Air outside the syringe exerted pressure on water causing it to move in when the plunger is pulled up.
D Both (B) and (C)


YEA IT IS C

Ans 1:

Devina kashyap from TPS, Mumbai
Class : Class 4
well I have no idea if the answer D is correct or not but i think that answer C is not correct as how can you say that the syringe which is inside water will get the force of air

Ans 2:

Pratham Dave from GNS, Bangalore
Class : Class 6
C is the answer to this question

Ans 3:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Ans 3 is wrong the correct ans is D.

Ans 4:

Sanskriti Nagar from Rose Bud Academy, khagaria
Class : Class 5
D is the correct answer

Ans 5:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

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11140 from pawar public school, Pune
Subject :NSO    Class : Class 6

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Shreyas Gupta from CHIREC International, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 8

Ans 2:

samyak jain from Prudence, New Delhi
Class : Class 8
answer should be 0.48

Ans 3:

vibhu mehrotra from Vidyashilp Academy, bangalore
Class : Class 7
shouldn't the answer be 0.75 m per sec??

Ans 4:

Sahil Ray from Podar International School, Thane
Class : Class 7
2.17

Ans 5:

Anish Ranjan Senapati from V S VIDYALAYA, KORAPUT
Class : Class 5
I didn't understand the questionPlease explain🙏🙏🙏

Ans 6:

Chandra GKS from Sentia The Global School, Hyderabad
Class : Class 9
how is this 2.17,can you explain,we got 0.48

Ans 7:

UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Class : Class 8
2.17 is the answer

Ans 8:

Ritvik Kar from D P S Bhilai, Bhilai
Class : Class 7

Ans 9:

Amishee Surya from bgsnps, Bengaluru
Class : Class 8
how come, Some one pls explain

Ans 10:

Amishee Surya from bgsnps, Bengaluru
Class : Class 8
can some one pls explain

Ans 11:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 7
HERE CORRECT ANSWER IS GIVEN AS B THAT IS 0.58

Ans 12:

Amishee Surya from bgsnps, Bengaluru
Class : Class 8
I think 0.75, though not in options

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student from school, city
Subject :NSO    Class : Class 6

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Isra Fathima from sophia high school, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5

Ans 2:

Rishabh Rathi from Blue Ridge Public School, Pune
Class : Class 5
a

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PARUL GHARSE from Vibgyor, Mumbai
Subject :NSO    Class : Class 5

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Prerona Chatterjee from Delhi Public School North Kolkata, Kolkata
Subject :NSO    Class : Class 4

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