386: Assertion (A) :
A tennis ball will bounce higher in Calcutta than it would in Shimla.
Reason (R) :
The downward pull due to gravity is less and air is more rarefied in Shimla than in Calcutta.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
387: The native State of Tripura became involved in the Freedom Movement early in the 20th century because
(a) the kings of Tripura were always anti-British
(b) the Bengal revolutionaries took shelter in Tripura
(c) the tribes of the State were fiercely freedom loving
(d) there were already some groups fighting against the kingship and its protector, the British
388: A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
(a) be shorter
(b) be longer
(c) depend on the height of the girl
(d) not change
389: A square is divided into 9 identical smaller squares. Six identical balls are to be placed in these smaller squares such that each of the three rows get at least one ball (one ball in one square only). In how many different ways can this be done?
(A) 81
(B) 36
(C) 54
(D) 27
390: Dry ice is:
(a) Solid carbon dioxide
(b) Ice dust
(c) Liquified nitrogen
(d) Liquified hydrogen