The rays
om
,
on
, and
op
in the figure, coincide at time t=0. at the same instant of time
om
and
op
rotate in the plane about point o in opposite directions while
on
remains fixed. with respect to
on
, segment
om
rotates at constant rate of 3° per second and
op
, at 6° per second. what is the smallest positive value of t, in seconds, for which segments
om
and
op
will coincide? when t=30 min, how many more revolutions does segment
op
complete than segment
om
?

To the north of ginnungagap it was bitterly cold. (20) nothing was there but fields of snow and mountains made of ice. to the south of ginnungagap was a region where frost and snow were never seen. it was always bright, and was the home of light and heat. the sunshine from the south melted the ice mountains of the north so that they toppled over and fell into ginnungagap. there may be a mistake in the way the sentence is written. if you find a mistake, choose the answer that corrects the mistake. if there is no mistake, choose ‘correct as is.' a) correct as is. b) nothing was there but snow fields and mountains of ice. c) nothing was there but fields of snow and icey mountains. d) nothing was there but fields of snow and mountains of ice.