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Welleby’s Plan

The water In the underground water table beneath the town of Welleby is moderately saline— 20,000millkjrarns of salt per liter of water (mg/L), or roughly half as saline as ocean water. To lower the level of the water table and thus prevent agricultural land from being inundated with salt water, the town plans to pump water from the table at a rate of 450kiloliters per day (kL/day) into a large shallow pond, allowing much of the water to evaporate. The town plans to divert 10percent of the water pumped from the water table to supplement Us supply of drinking water, which Is currently piped In from great distances. Due to the water's supply, the town intends to construct a desalination plant to treat the diverted water for use as drinking water.

Desalination Types

Comparison

Welleby is deciding among the following three desalination methods.

Reverse Osmosis (RO): Water Is pushed through a membrane, leaving salts behind. RO systems can handle a large range of water flow rates and use relatively little energy. However, RO membranes are expensive and must be replaced every 2 to 5 years. There is also a possibility that bacteria can grow on the membrane. Introducing tastes and odors Into the desalinated water.

Multi-Effect Distillation (MED): Saline water Is heated to produce water vapor, from which Is condensed potable fresh water. This process requires large amounts of energy, regardless of the salinity of the source water. It becomes more cost effective as water volumes increase.

Electrodialysis (ED): Electricity is used to selectively move salts through a membrane. Consumption of energy Is directly proportional to the salinity of the water to be treated, so with higher salinities the process rapidly becomes more costly than other methods. ED membranes need to be replaced every 7 to 10years.

Based on the information provided, which one of the following benefits to Welleby is most likely to result from Its building a desalination plant?

The color red has been shown to induce greater aggression in people than the

color blue, Researchers conducted a study to determine whether such colorinduced aggression could influence the amount that consumers were willing to

pay for an identical product in online auction and online negotiation scenarios.

The researchers photographed a single item against each of four background

colors: blue, gray, white, and red. Using a computer, each participant in the study

viewed the item against exactly one of the four background colors. Half of the

participants were told the item was up for auction and were asked to submit their

highest bid for the item. The other half of the participants were told to negotiate

a price with the seller and were asked to offer the highest amount that they

would be willing to pay for the item.

The researchers expected that participants who viewed the red background

would typically behave more aggressively than those who viewed the blue

background. Among the auction group, the researchers hypothesized that more

aggressive participants would submit higher bids as they tried to beat other

potential bidders. Among the negotiation group, the researchers hypothesized

that more aggressive participants would make lower offers as they tried to

compete against the seller to get the best deal.

For each of the following statements about the researchers' study, select Yes if

that statement accurately reflects the information provided. Otherwise, select No.