21-25 Match the description to the amounts A-E Description 21. Which sample has the least mass? 22. Which sample has the greatest mass? 23. Which sample has the least atoms? 24. Which sample has the most atoms? Samples A) 1 mole of Ne B) 2 moles of Ar C) ¼ mole of Br2 D) 1/4 mole of Hg E) 4 mole of He 25, Which sample has the greatest volume at STP? 26-30. Match the following descriptions to the amounts given as A-E

1.B. (20) a). Find the transfer function T(s) for the following state space model 0 1 0 01 o -9 -7 -15-8 y5 3 8 2] b). Draw a block diagram for it.

Vcc +8V Rc 330 12 C3 R1 12 k12 16 -o Vout C 10 uF Vino 개 10 μF Bpc = Bac = 150 RE R2 3.3 k12 100 12 .C2 '100 uF = = =

Part C: Speech Enhancement Digitally recorded speech in a noisy environment can be enhanced using a lowpass filter if the recorded speech with a sampling rate of 8,000 Hz contains the desired frequency components lower than 1,500 Hz. 1. Design a lowpass flter to remove the high frequency noise above 1,500 Hz with the following filter specifications Passband frequency: 0-1,000 Hz Passband ripple: 0.1 dB Stopband frequency range: 2,000-4,000 Hz Stopband atteuation: 50 dB Print the FIR filter coefficients and plot the frequency responses using MATLAB. 2. Use the designed lowpass filter to filter the noisy speech and adopt the following code to simulate the noisy speech: load speech.dat t-[0: length(speech)]-T: th=mean(speech. *speech)/4; % Noise power =(W4) speech power noise-sqrt (th)*randn ([1, length(Speech)]); % Generate Gaussian Noise nspeech-speech+noise. % Generate noisy speech Plot the speech samples and spectra for the original speech, the noisy speech and the enhanced speech and evaluate the sound quality

The energy release in the reaction A(d, p)B is Q. Show that the neutron separation energy for nucleus B is Sn = Q + ε, where ε is the binding energy of the deuteron (d). Till

PART I. Chemical Models 1. Using the Lewis structures drawn for the prelab, build the structure with the model kit. 2. The final 3D sketch/drawing must be based off the chemical model you have made and it MUST impart 3-D perspective. Use wedge bonds (and hashed bonds (.. indicate bonds coming towards you and those going away from you respectively. Each 'central' atom is underlined. For each central atom: 3. describe/name the structure (e.g. electron and molecular geometry) around it. Structures can be linear, trigonal planar, pyramidal or tetrahedral, etc. b. assign proper bond angles c. evaluate the polarity of the molecule using appropriate dipole arrows i. HNO3 [HONO2] (11 pts) 3-D Structure Does HNO3 exhibit resonance? If so, be sure to include all resonance structures. Lewis Dot Structure Electron Geometry Molecular Geometry Bond Angle(s) Is this molecule polar or nonpolar? Represent using arrows) CHEM 1210 LAB 6 Chemical Models and Equations 96

Problem 4. (10 Points) Ambrosia Foods produces a gourmet condiment that sells for $24 per unit. Variable cost is $6 per unit, and fixed costs are $8000 per month. If Ambrosia expects to sell 1500 units, compute the margin of safety in units. (Round any intermediate calculations and your final answer to the nearest whole unit.) Problem 5. (Points 15) Neptune Fabrication Plant has provided you with the following information. Total manufacturing overhead estimated at the beginning of the year Total direct labor costs estimated at the beginning of the S250,000 $125,000 5,000 direct labo otal direct labor hours estimated at the beginning of the ear ho manufacturing overhead costs for the year $240,000 $135,000 4,500 direct labor ctual direct labor costs for the year Actual direct labor hours for the year The company bases its manufacturing overhead allocation on direct labor hours. hours A) How much overhead was applied during the year? B) Was overhead under or over applied during the year and by how much?

ormalized Classify the following signals as energy signal or power signals, and find the n energy or power of each. (20 points) 1) x1(t)=bcos(at) a. b. X2 (t) = a6(t-b) Xs (t) C. Consider the signal x()-2 sin abl , whose fundamental frequency is a, find the Fourier series coefficients for this signal. (hint: expand the sinusoidal signal as a linear combination of complex exponentials and identify the Fourier series coefficients by inspection)Let x2 (1) = (a + b) + cos ab-sin aart , use the same method to determin the Fourier series of it. Let x,0) = a cos aot + b sin ab, find its Fourier series. (30 points) 2)

DIRECTIONS: For all sections in the fill-in portion of this exam, clearly print the technical terms in the spaces provided. There is no credit for abbreviations (other than ions or where indicated) or misspelled terms 61) Clearly print the technical term that best matches each description/definition below. (7 points) Description Term a) Pre-mRNA is "edited" into its final form by a group of protein-based b) This specific enzyme breaks hydrogen bonds between the two DNA c) During DNA replication, an enzyme reads each strand of DNA in a READS TEMPLATE molecules called(An abbreviation is fine here) strands to ready both for replication SYNTHESIZES STRAND specific direction and synthesizes the complementary strand in another orientation. In the answer blanks, indicate the direction this enzyme READS the DNA template strand, and the orientation of the newly SYNTHESIZED strand, using the numbering conventions covered in class. is the name of a process that combines endocytosis on one side of a cell, vesicular transport with motor proteins along the cytoskeleton and exocytosis on the other side of the cell. e) When a cell's membrane potential is more negative than at rest, it is f) This term describes any signal molecule (neurotransmitter, cytokine, g) Only lipophilic/nonpolar signal molecules can bind to receptors located said to be etc.) that binds with receptors on nearby target cells in the or the of a cell.