Which of the following must be true in order for a newly designed product to function properly?
A.
The design must be aesthetically pleasing as well as functional.
B. The construction materials must be compatible with the design and the intended use of the product.
C.
The cost of building the product must be accurately determined, and production stays under budget.
D.
all of these

List four observations that indicate that a chemical reaction may be taking place

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

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?