The government runs a campaign promoting the adoption of wild horses and burros; however, there are not enough horses to feed the adoption
a. True
b. False
Indicate whether the statement is true or false
True
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The decomposition of nitrogen dioxide 
into nitrogen monoxide 
and oxygen is a second-order reaction. This means that the concentration C of 
at time t is given by 1/C=kt+1/
, where is the initial concentration and k is the rate constant. Assume the initial concentration is known to be 0.03 mol/L exactly. Assume that time can be measured with negligible uncertainty.
a. After 40 s, the concentration C is measured to be 0.0023 ± 2.0 ×10–4mol/L. Estimate the rate constant k, and find the uncertainty in the estimate.
b. After 50 s, the concentration C is measured to be 0.0018 ± 2.0 ×10–4mol/L. Estimate the rate constant k, and find the uncertainty in the estimate.
c. Denote the estimates of the rate constant k in parts (a) and (b) by 
, respectively. The average 
is used as an estimate of k. Find the uncertainty in this estimate.
d. Find the value of c so that the weighted average 
has the smallest uncertainty.
In the modern refrigeration cycle, the compressor:
A) Increases the pressure of the liquid refrigerant so that it will circulate through the system. B) Transfers heat to the outdoor air. C) Reduces the pressure of the liquid from the condenser to the evaporator. D) Pumps low-pressure, low-temperature vapor to high-pressure, high-temperature vapor.
The keep alive signal is required when no signal is present in order to keep the end pieces of equipment ________
Fill in the blank(s) with correct word
Find the power used in the single-phase circuit shown. Carry the answer to three decimal places.
Fill in the blank(s) with the appropriate word(s).