After the oil is pressed out of soybeans, what percentage of protein is left in the ground cake?
a. 45% c. 35%
b. 55% d. 75%
A
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A. dry B. soluble oil C. water D. lard
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In a chemical reaction run at a certain temperature, the concentration C of a certain reactant at time t is given by 
where 
is the initial concentration and k is the rate constant. Assume the initial concentration is known to be 0.04 mol/L exactly. Assume that time is measured with negligible uncertainty.
a. After 30 s, the concentration C is measured to be 0.0038 ± 2.0 × 
. Estimate the rate constant k, and find the relative uncertainty in the estimate.
b. After 50 s, the concentration C is measured to be 0.0024 ± 2.0 ×. Estimate the rate constant k and find the relative uncertainty in the estimate.
c. Denote the estimates of the rate constant k in parts (a) and (b) by 
respectively. The geometric mean 
is used as an estimate of k. Find the relative uncertainty in this estimate.
An automaton asset with a high first cost of $10 million has required capital recovery (CR) of $1,985,000 per year. The correct interpretation of this CR value is that:
(a) the owner must pay an additional $1,985,000 each year to retain the asset. (b) each year of its expected life, a net revenue of $1,985,000 must be realized to recover the $10 million first cost and the required rate of return on this investment. (c) each year of its expected life, a net revenue of $1,985,000 must be realized to recover the $10 million first cost. (d) the services provided by the asset will stop if less than $1,985,000 in net revenue is reported in any year.