Devise an efficient synthesis of 1-phenyl-1-heptanol utilizing an electrophilic aromatic substitution reaction as a key step. Draw and select the missing reagents.

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Idon’t know how to solve this question

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.