Expert Answers

Predict how the of each of the following changes would affect the solubility of MgNH4PO4 (magnesium ammonium phosphate, Ksp = 3 x 10-13): Removal of Mg2+ ion (by precipitation with OH-) Addition of PO43- ion Addition of NH4+ ion

Which production function would you estimate if your are interested in Stage I of the production processes? Log-log or Cobb-Douglas Square root Transcedential Constant elasticity Quadratic

Deisgn a circuit the follows this creteria and has the values of all components used. Active crossover networkThis is a two-week lab. Build a circuit that takes a single audio frequency input and producesthree separate outputs. One output will consist of the frequency components of the input below 300 Hz, the second will have the frequency components between 300 Hz and 5000 Hz, the third will have all the frequency components above 5000 Hz. This circuit is essentially a cross-over network, which is used to divide an audio into the parts that would be sent to the woofer, mid-range, and tweeter of a three-way speaker system. The response for the low-frequency channel must have a high corner frequency at 200 Hzand roll off at 40 dB/decade above the corner (i.e. it should be a 2nd-order filter). The response for the mid-frequency channel must have a low corner frequency at 300 Hz,a high-frequency corner at 5000 Hz, and roll off at 20 dB/decade below and above thecorners (i.e. 1st-order is OK here). The response for the high-frequency channel must have a low corner frequency at 6000Hz and roll off at 40 dB/decade below the corner. The input resistance to the circuit must be bigger than 10 k. You can use two DC power supplies (up to +/- 15 V) to power the circuit. The mid-frequency and high-frequency channels should have a gain magnitude of 1 inthe passband region (i.e. no gain). The gain for the low frequency channel should beadjustable between 1 and 5. (This provides a "bass boost" for the audio system.) Theadjustment should be made using a single potentiometer.Testing / Reporting Your lab supervisor will test your circuit. In particular you should be ready todemonstrate the frequency response of each section and the adjustability of the gain ofthe low-frequency section. Record a frequency response for each channel of the circuit. Write a report that includes: (One report for the group.)1. a circuit diagram,2. a photo of your circuit3. a written description of the design of the circuit,4. the measured frequency response plots, and5. any additional comments about the performance (or lack thereof) of your circuit.

Which of the following best describes what happens when a DNS server recrives an iterative name resolution query? Aattempts to resolve the requested name by checking its own resource records and cache or, failing that, by issuing its own iterative qurnies to other DNS servers Bit responds immediately to the query with the best information it has in its resource records or in its cache, or failing that, with an error message stating that it could not resolve the requested name CO None of these. It attempts to resolve the requested name by checking its own resource records and cache or, falling that, by forwarding the name resolution request to another DNS server in a recursive query

Which of the following BaCO3 (Ksp = 1.6 x 10-9) solutions would be completely soluble at the concentration listed? 1x10-6 M, 1x10-5 M, 1x10-4 M, 1x10-3 M

why is the diels alder reaction symmerty allowed transition, while the formation of cyclobutuane from two ethere molecules a symmetry forbidden transition

(15.) Complete the wiring diagram, connecting feed-through GFCI 2 to also protect receptacle 1, both to be supplied by Circuit A1. Connect feed-through GFCI 3 to also protect receptacle 4, both to be supplied by Circuit A2. Use colored pencils or markers to show proper color. Assume that the wiring method is EMT, where more freedom in the choice of insulation colors is possible. 2 3

In a Monohybrid Cross using pea plants with purple or white flowers, the F2 generation will have an expected phenotypic ratio of

white:

purple 3 white: 1 purple 3 purple: 1 white

purple:

white

Question 7 (0.5 points)

Saved Exchange of a hydroxyl atom with a halide ion is an example of a bimolecular substitution reaction which involves the formation of stable carbocation intermediates. 13 14 15 True False 16 17 18

Commercial hydrochloric acid (Muriatic acid) is 12.1 M. What volume of commercial HCl solution should be used to prepare 250.0 mL of 3.00 M HCl? A) 139 mL B) 126 mL C) 252 mL D) 83.0 mL E) 62.0 mL