## How many bags does the representative need to test?

A chemical manufacturer claims that its? ice-melting product will melt snow and ice at temperatures as low as 0? Fahrenheit. A representative for a large chain of hardware stores is interested in testing this claim. The chain purchases a large shipment of? 5-pound bags for distribution. The representative wants to? know, with 99?% confidence and within ±0.03?, what proportion of bags of the chemical perform the job as claimed by the manufacturer.

1. How many bags does the representative need to? test?
2. Suppose that the representative tests 50 bags, and 38 of them do the job as claimed. Construct a 99?% confidence interval estimate for the population proportion that will do the job as claimed.

### set up and solve a case-study example of the light-intensity distribution in a photochemical reactor.

Photochemical reactor modeling: a case-study problem. Although radiation is important in heat transfer, an analogous model can be used in the design of photochemical reactors. The modeling of these reactors….

### Write a critique on this technique of secondary-emission measurement.

Secondary-emission measurement: a case-study problem. An indirect way of measuring of secondary emission from ponds or large bodies of water used in waste treatment is to measure the concentration and….

### set up a mass transfer model and evaluate the variation of the local mass transfer coefficient at various locations in the plate.

Chemical vapor deposition (CVD) on an inclined susceptor: a case-study problem. An important application of convective mass transfer theory is in CVD processes employed to coat surfaces with thin films….