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A chemistry graduate student is studying the rate of this reaction: 2NH$_3$(g) → N$_2$(g) + 3H$_2$(g) She fills a reaction vessel with NH$_3$ and measures its concentration as the reaction proceeds: time (seconds) [NH$_3$] 0 0.0200 M 1.0 0.00986 M 2.0 0.00486 M 3.0 0.00240 M 4.0 0.00118 M Use this data to answer the following questions. Write the rate law for this reaction. rate = k Calculate the value of the rate constant $k$. k = Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.

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What are the three primary tasks of a social movement frame?

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Lesson 7.2 Similar Polygons 11) Given ABCD~WXYZ. List the pairs of congruent angles and the extended proportion that relates the corresponding sides.

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determines what happens to glycogen breakdown if a muscle preperation containing glycogen phosphorylase is treated with:

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hormones bind with an intracellular receptor to form a ______ which activates specific genes. Multiple Choice Steroid and thyroid; DNA-mRNA complex Steroid and thyroid; receptor-hormone complex Nonsteroid; receptor-hormone complex Nonsteroid; DNA-mRNA complex

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Use the table to answer the question. \begin{tabular}{|l|l|} \hline$ x $ & $ y $ \\ \hline-2 & -1 \\ \hline 0 & 1 \\ \hline 2 & 3 \\ \hline \end{tabular} Write an equation that represents this nomproportional linear relationship. (1 point) 0 $ y=x+1 $ $ y=-2 x+1 $ $ y=x+2 $ $ y=\frac{1}{2} z+1 $

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4. The total area of Asia, Africa, North America, South America, Europe, and Australia are 134 million square kilometres. The pie chart below shows the pencentages of the areas of each continent. (a) What is the area of Asia? (b) What is the area of Europe? (c) How much bigger is Africa than Europe?

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59. When assessing posture in a standing client, it is important that the a. symmetric stance be used. b. feet be together. c. asymmetric stance be used. d. hands be together.

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Question 2: A 2-kg object attached to a spring with a constant k = 20 N/m moves without friction and is driven by an external force F = (3.00 N) sin (2t). 1) Write the differential equation of the system. 2) Calculate the amplitude of the forced oscillation. 3) If we assume that the external force of the last equation is F = (3.00 N) sin (wt). a) Find the resonance angular frequency wr. b) Deduce the amplitude of the oscillator in the resonance state. Question 2: A 2-kg object attached to a spring with a constant k = 20 N/m moves without friction and is driven by an external force F = 3.00 N sin (2t). Write the differential equation of the system. UNIVERSITY SCIENCE AND HUMANITIES COLLEGE - JUBAIL - PHYSICS HW2 Course name: Oscillations Level: 3 Term: 1/2023-2024 Waves 2) Calculate the amplitude of the forced oscillation. 3) If we assume that the external force of the last equation is F = 3.00 N sin (wt). b) Deduce the amplitude of the oscillator in the resonance state.

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The surfactant secreted by special cells in pulmonary alveoli Select one: ? a. kills pathogens ? b. prevents pulmonary alveoli from collapsing ? c. traps the inhaled particles ? d. keeps pulmonary alveoli moist As the volume of a container decreases, Select one: ? a. the temperature decreases ? b. the pressure decreases ? c. the pressure increases ? d. the temperature increases What is a function of the pulmonary circuit? Select one: ? a. It carries oxygen-poor blood from the tissues. ? b. It carries oxygen-poor blood to the lungs. ? c. It carries oxygen-poor blood to the tissues. ? d. It carries oxygen-poor blood to the heart.

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