Explain the construction of a modern three-way catalyst and the elements it is made of.
What will be an ideal response?
Modern catalytic converters utilize a three-way catalyst ceramic block substrate containing platinum, palladium, and rhodium as the catalyst material. The substrate is a honeycomb of hundreds of passages. These passages in the substrate create a very large surface area.
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What natural forces often promote the spread of pests from plant to plant?
a. wind c. sunlight b. splattering rain d. both "wind" and "splattering rain"
Add 0.102 inch and 0.080 inch. The answer is ________
A) 0.8200 inch B) 0.0082 inch C) 0.1082 inch D) 0.1820 inch
You wish to make a large cup of tea. How much energy is needed to raise the temperature of 500 ml of tap water from 13°C to 100°C ?
What will be an ideal response?
When selecting a transformer, its ____ is the first concern.
A. primary power rating B. frequency C. secondary voltage and current ratings D. power-handling capability