The greater the velocity the fluid flows through an orifice, the __________ the differential pressure that develops across it.
A. less
B. greater
Answer: B
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If a pure inductance is connected to an ac source, the current lags the applied voltage by ____________________ electrical degrees.
Fill in the blank(s) with the appropriate word(s).
Information that provides a reliable and valid reflection of the real world is said to be
a. accurate. b. complete. c. differentiated. d. systematic. e. dependable.
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.
Microcontrollers use data registers to contain information about conditions associated with peripheral operation
Indicate whether the statement is true or false