Numerade

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Comparing radio waves and ultraviolet light, which of the following is true? roemer (mlr4688) – HW4 – ditmire – (86575) 2 1. Radiowaves have lower frequency, faster speed, and shorter wavelength than ultraviolet light. 2. Radiowaves have lower frequency, same speed, and longer wavelength than ultraviolet light. 3. Radiowaves have higher frequency, same speed, and longer wavelength than ultraviolet light. 4. Radiowaves have lower frequency, slower speed, and longer wavelength than ultraviolet light. 008 (part 1

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As exercise intensity increases, fat use decreases due to _____ the recruitment of more slow twitch fibers. the increase in lactate accumulation the increase in blood pH all of the above

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A secondhand furniture store buys sofas with a list price of $7,500. If the wholesaler offers trade discounts of 30/40/50, find the single equivalent discount.

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Which of these is a positive symptom of schizophrenia? Hallucinations Disrupted emotions Temporary immobility Flat affect

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Exercise 6-13A (Algo) Effect of establishing a petty cash fund LO 6-4 Chen Company established a $1,325 petty cash fund on January 1, Year 1. Required a. Is the establishment of the petty cash fund an asset source, use, or exchange transaction? b. Show the establishment of the petty cash fund in a horizontal statements model. c. Record the establishment of the fund in general journal format. Complete this question by entering your answers in the tabs below. Required A Required B Required C Is the establishment of the petty cash fund an asset source, use, or exchange transaction? Is the establishment of the petty cash fund an asset source, use, or exchange transaction?

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Consider the reaction: 2 HI (g) ⇌ H₂ (g) + I₂ (g) Kc = 7.21 If at equilibrium, the reaction vessel contains 1.20 M of H₂ and 1.70 M of I₂, then what is the equilibrium concentration of HI?

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Problem 2 Through this reactor, the flow rate is 200,000 lb/stream hour. Ethane uses the equivalent of 1.1 lb of capacity per pound of ethane; propane 0.9 lb; gas oil 0.9 lb/lb; and DNG 1. The downstream operation is limited to 50,000 lb/stream hour (ethylene) and 20,000 lb/stream hour for propylene. DNG Gas oil Ethane Recycle (Ethane) Thermal cracker (Propane) Methane Fuel oil Ethylene Propylene Butadiene Gasoline Yield table: (e.g. methane product needs the following feed: 0.07 ethane + 0.25 propane + 0.1 gas oil + 0.15 DNG) Feed Propane Gas oil 0.25 0.1 0.06 0.0 0.35 0.2 0.1 1.0 0.15 0.15 0.02 0.04 0.07 0.25 0 0.21 Product Methane Ethane Ethylene Propane Propylene Butadiene Gasoline Fuel Oil Ethane 0.07 0.4 0.5 0 0.01 0.01 0.01 0 DNG 0.15 0.05 0.25 0.01 0.18 0.05 0.3 0.01 The fuel requirement to run the reactor with respect to each feed type is given as follows: Feed type Fuel requirement (BTU/lb) Ethane 8364 Propane 5016 Gas oil 3900 DNG 4553 Heating values (Heat produced): Recycled feed Fuel Produced (BTU/lb) 21520 21520 18000 Natural gas Methane Fuel oil Price for feeds, products, and fuel are listed below: Feed type Ethane Propane Gas oil DNG Price ($/lb) 6.55 Products Methane Ethylene Propylene Butadiene Gasoline Fuel oil Price ($/lb) 5.38 17.75 13.79 26.64 9.93 4.5 12.50 10.14 The fixed fuel requirement is 20*10^6 Btu/stream hour. Assume an energy fuel cost of 2.50S/(10^6 Btu). 1. Set up the objective function and constraints to maximize profit by writing all necessary equalities, inequalities, bounds, etc., when they exist. The variables to be optimized are the amounts of stream feed into the reactor. (Hint: estimate product value, feed and energy costs. This is a linear problem.) Recycled methane is considered to contribute to the fuel source, not significantly to the mass.

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The equation to compute sin(x) using infinite series is given below: $\infty$ $\sum_{n=0}^{\infty} T_n = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n+1}}{(2n+1)!} = x - \frac{x^3}{3!} + \frac{x^5}{5!} - \dots$ sin(x) = Note that the value of x is given in radians. Depending on the accuracy required, we can compute each term and keep adding it to the partial sum of infinite series until the next term is negligibly small value denoted by epsilon (eps), say less than 0.000001. Write a program to calculate the value of sin(x) using the above infinite series. The program prompts the user to enter the values of x and eps. It then calculates the value of sin(x) and prints it out on the screen. Test your program for the following values (assume eps = 0.000001): x = 0.785398, x = 6.083185, x = 4.112389, x = 7.225665

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The figure shows the demand curve for milkshakes. Suppose that the price of a milkshake rises but all other influences on buyers' plans remain the same. Show the effect in the graph. Draw either an arrow on the demand curve showing the direction of change or a new demand curve. If the price of a milkshake rises, a ____ the demand curve occurs. If any factor that influences buying plans other than the price changes, then a ____ the demand curve occurs. A. movement up along; shift of B. rightward shift of; movement down along C. movement down along; shift of D. leftward shift of; movement up along

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Second Law of Thermodynamics & Entropy Questions taken from Schaum's Thermodynamics for Engineers 5.28 A Carnot refrigeration cycle is used to estimate the energy requirement in an attempt to reduce the temperature of a specimen to absolute zero. Suppose that we wish to remove 0.01 J of energy from the specimen when it is at $2 \times 10^{-5}$ K. How much work is necessary if the high-temperature reservoir is at 20°C? Ans. 1465 kJ 5.29 A refrigerator is proposed that will require 10 hp to extract 3 MJ of energy each minute from a space which is maintained at -18°C. The outside air is at 20°C. Is this possible? Ans. Yes 5.30 A reversible refrigeration unit is used to cool a space to 5°C by transferring heat to the surroundings which are at 25°C. The same unit is then used to cool the space to -20°C. Estimate the cooling rate for the second condition if the cooling rate for the first is 5 tons. Ans. 7.12 kW 6.21 A Carnot engine extracts 100 kJ of heat from an 800°C reservoir and rejects to the surroundings at 20°C. Calculate the entropy change (a) of the reservoir and (b) of the surroundings. Ans. (a) -0.0932 kJ/K (b) 0.0932 kJ/K 6.22 A Carnot refrigerator removes 200 kJ of heat from a refrigerated space maintained at -10°C. Its COP is 10. Calculate the entropy change (a) of the refrigerated space and (b) of the high-temperature

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