National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
?

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 9

Consider the given statements and select the option which correctly identifies the true (T) and false (F) statements.
(i) Distance is the magnitude of displacement in all cases.
(ii) When a body moves with uniform speed, then the average speed is same as instantaneous speed.
(iii) Average speed is greater than the average velocity if a body is moving in a straight line without reversing its direction.
(iv) When a body moves with constant velocity, the average velocity is zero.


(i) (ii) (iii) (iv)
A T F T F
B T T T T
C F F F F
D F T F F


why?

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Subject :NSO    Class : Class 9

Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B, it has the same.

A Position and velocity as ball B
B Position and acceleration as ball B
C Velocity and acceleration as ball B
D Displacement and velocity as ball B


how?

Ans 1:

Class : Class 9

Ans 2:

Class : Class 9
How position and acceleration will be same at that point?

Ans 3:

Class : Class 9
acceleration due to gravity should be negative for B while positive for A thus not same

Ans 4: (Master Answer)

Class : Class 1

The correct answer is B.

 
Position and acceleration of A is same as that of B at the instant when ball A passes ball B.


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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

SLV that stands for Satellite Launch Vehicle, was a project started by the Indian Space Research Organisation (ISRO) and was headed by APJ Abdul Kalam in the early 1970s, to develop the technology needed to launch satellites. 

PSLV (which stands for Polar Satellite Launch Vehicle), GSLV (which stands for Geosynchronous Satellite Launch Vehicle) and ASLV (Augmented Satellite Launch Vehicle) are expendable satellite launch systems operated by the Indian Space Research Organisation (ISRO). The difference between all three systems lies in the difference in their payload capabilities. For example: In case of ASLV  with vehicle weight of 41 tons, can launch payloads of 150 kgs into space upto an orbit of 400 kms. While in case of PSLV with vehicle load about 295-320 tons, can launch payloads upto 1678 kgs in sun synchronous orbit of 622 kms. And in GSLV with vehicle weight of 415 tons, can carry upto 5000 kgs in orbits of 550 kms. 


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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

Sriharikota is the ideal rocket launching site of ISRO.


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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The full form of PSLV is Polar Satellite Launch Vehicle


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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

Earth rotates eastward around its own axis in prograde motion. 


Ans 2:

Class : Class 8
West-east

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
Sowing is planting of seeds in the soil. Whereas broadcasting is a form of sowing the seeds where the seeds are scattered by hand on the field.

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

Tilling is a process of preparation of the agricultural soil by mechanical agitation of the soil by digging, stirring, and overturning.


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