Between 1975 to 2000, the volume of all iron and steel in an automobile model decreased from 9885 cubic-inches to 5000 cubic-inches. Over the same period, the volume of aluminum alloys increased from 730 cubic-inches to 2075 cubic-inches. Esitmate the total mass reduction resulting from this trend in materials substitution.

What would be the yield if 950 tons of aluminum were rolled from 1,000 tons of ingot? If yield is less than 100%, what possible explanations could account for that?

Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01,0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported?a. Deformation of a steel specimen during the tension test (mm)b. Tensile strength of steel (MPa)c. Modulus of elasticity of aluminum (MPa)d. Weight of aggregate in a sieve analysis test (grams)e. Compressive strength of portland cement concrete (MPa)f. Moisture content in a concrete masonry unit (percent)g. Asphalt content in hot-mix asphalt (percent)h. Specific gravity of woodi. Distance between New York City and Los Angeles (km)j. Dimensions of a computer microchip (mm)

3.3 If an ion exchange water softener has 0.2 m of ion-exchange resin with an exchange capacity of 75 kg/m'. The occupants use 2500 gallon/day of water per day. If the water contains 250 mg/L of hardness as CaCO3 and it is desired to soften it to 90 mg/L as CACO3, what is the time between b) 14 days regeneration? a) 15 days c) 12 days d) 10 days