Lake Nettle is 180 kilometres wide. A yacht sailing east at a constant velocity took 2 hours to cross half the width of the lake. What was the yacht's velocity? Write your answer as a whole number.

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Pulmonary arteries carry highly oxygenated blood. true or false?

Which individual below would be considered heterozygous? a.dd b.dd c.dd