A ride at a park lifts people 30 m into the air, holds them at that height, and then drops them. What should be the reference point if you want to study the
motion of the people dropping?
O A. 10 m up
B. 20 m up
C. Ground level
O D. 30 m up

Suggest which functional groups are responsible for the reactions with(i) sodium,(ii) bromine water(iii) alkaline aqueous iodine.(3 marks)(iv) suggest structures for x and y.(1 mark)(b) one molecule that has been found in the dust clouds is hydroxyethanal: hoch2cho.name the two functional groups present in this compound.(2 marks)(c) but-1-ene, ch3ch2ch=ch2, is an important compound in the petrochemical industry.some reactions of but-l-ene are given below. in each empty box, draw the structural formulaand write the name of the organic compounds formed.