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Aishwarya B from Shantiniketan International School , Hyderabad, HYD
Subject :NSO    Class : Class 7

Given graph shows the first few seconds of a motor cycle ride. In the graph, the motor cycle travels _____.


AAt increasing speed and then stops
BWith constant acceleration and then stops
CWith constant acceleration and then at constant speed
DAt constant speed and then slows down


In a speed and time graph a slope means that there is constant acceleration, then there is a straight line parallel to time which shows uniform speed

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Akshaj Vardhan Kothapalli from Delhi Public School, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Aditya Sandip Patil from Saraswati Vidyalaya and J.R. College, Thane
Class : Class 7
Option C is correct

Ans 2:

Purohit Mohit Viralbhai from SDA higher secondary school, ahemdabad
Class : Class 5
option b is correct enamel covers the crown of a tooth

Ans 3:

Kanishk Adarsh Kumar from Amity International School, Noida, Sector 44, Noida
Class : Class 5
Total eight premolars and enamel covers the teeth so, b is correct.

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Aaryana from Amaatra Academy, Bangalore
Subject :NSO    Class : Class 3

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rudransh from shri ram centennial, indore
Subject :NSO    Class : Class 4

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Lasya Kotamraju from Ganges Valley School, Hyderabad
Subject :NSO    Class : Class 3

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Sanskrti from Sri Chaitanya Techno School, Electronics City
Subject :NSO    Class : Class 5

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Aaron masih from St Xaviers Global Academy, thane
Subject :NSO    Class : Class 6

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Saiansh Biswas from Little Flower School, Jamshedpur
Subject :NSO    Class : Class 1

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Sidharth V from Hindustan International School, Chennai
Subject :NSO    Class : Class 2

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PURNA CHANDRA BEHERA from Pragyan School, Greater Noida, Greater Noida
Subject :NSO    Class : Class 9

Which of the following statements is/are correct?
I. Sound wave does not follow the same law of reflection as light does.
II. Tone is a sound of a single frequency while note is a mixture of several frequencies.
III. Infrasonic waves are used in SONAR.
IV. The numerical ratio of displacement to distance for a moving object is always less than one.
V. The value of acceleration due to gravity is least on equator.

AII only
BI, II and III only
CIV and V only
DII and V only


II is wrong, since note is the single frequency.

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