a cylindrical object has a diameter of 1.25 cm and a height of 6.48 cm. what is its volume? be sure to provide units and express your answer to the correct number of significant figures.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus