? Universe के ये Facts आप नहीं जानते ?| Enigmatic Space Facts |#shorts

Suppose you are told that the linear size of everything in the universe has been doubled overnight. Can you test this statement by measuring sizes with a metre stick? Can you test it by using the fact that the speed of light is a universal constant and has not changed? What wll happen if all the clocks in the universe also start running at half the speed?

KO_(2) finds use in oxygen cylinders used for space and submarines. The fact(s) related to such use of KO_(2) is /are :

Which of the phrases (a), (b), (c) and (d) given below each statement should be placed in the blank space provided so as to make a meaningful and grammatically correct sentence? If more of the sentences is appropriate, mark (e) i.e. 'None of these' as the answer. Overlooking the fact that water scarcity intensifies during summer_____.