Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
james harvey

james h.

Divider

Questions asked

BEST MATCH

Problem 3 (5 points): Consider a steel rod ($\rho = 7832$ kg/m$^3$, $c_p = 434$ J/kg K, and $k = 63.9$ W/m K) with a diameter of 2.5 cm and a length of 1.27 m, which is heated in an oven with an approximate heat transfer coefficient of 20 W/m$^2$ K. The rod is to be heated from a temperature of 20 $^\circ$C to 450 $^\circ$C before being wound into a coil for a car's suspension system. a. (1 point) Calculate the Biot number for this rod. b. (1 point) Is the temperature distribution inside of the rod approximately uniform throughout the heating process, or not? Briefly argue why or why not. c. (2 point) If the manufacturing plant needs each rod to be heated to the desired temperature in 10 minutes, estimate the approximate ambient temperature of the oven. d. (1 point) Sketch (or if you're very ambitious, calculate) a plot of the core temperature of the rod as a function of time if the rod is to be heated up to the desired temperature in 10 minutes.

View Answer
divider
BEST MATCH

Use substitution to find the indefinite integral. $$ \int 7(7x-8)^3 dx $$

View Answer
divider
BEST MATCH

You are thinking about renting a room in a house next year with three of your friends. For each month's rent, you are willing to pay $530, your first friend is willing to pay $500, your second friend is willing to pay $560, and your third friend is willing to pay $560. The landlord agrees to offer each of you separate leases but will charge you all the same price: $500. You decide this is a good deal, so you and your friends move in. A couple of months later, you learn from someone who knows the landlord that he would have been willing to rent each room for $450 per month. 1st attempt Part 1 (1 point)

View Answer
divider
BEST MATCH

What type of bond would you find between the complementary bases on a double strand of DNA? Question 3 options: a) Nonpolar covalent bonds b) Polar covalent bonds c) Ionic bonds d) Hydrogen bonds

View Answer
divider
BEST MATCH

If n = 12, \bar{x}=41, and s = 14, construct a confidence interval at a 90\% confidence level. Give your answers to one decimal place.

View Answer
divider
BEST MATCH

Previous Answers By convention, the lattice energy is the energy required to form one mole of a solid ionic crystalline lattice from its gaseous ions. Since we cannot directly measure lattice energies, we generally use the Born-Haber cycle to calculate the lattice energy from other measurable quantities. For instance, the Born-Haber cycle of sodium chloride is shown: The magnitude of the charges in an ionic compound has a correlation to melting point as well as lattice energy. For example, BeO and MgO have melting points above 2000°C, NaO and NaS have melting points around 1000°C, and LiCl has a melting point below 1000°C. Part B Na(g) + e + Cl(g) → Na+(g) + Cl-(g) ΔH[Na(g)] = 178 kJ/mol ΔH[Cl(g)] = 112 kJ/mol Na(g) + Cl(g) → NaCl(s) ΔH[NaCl(s)] = -675 kJ/mol Given the following thermodynamic data, calculate the lattice energy of CaBr(s): ΔH[CaBr(s)] = ? ΔH[Ca(g)] = 590 kJ/mol ΔHf[Br(g)] = 112 kJ/mol ΔH[Ca] = 590 kJ/mol ΔH[Br] = 1145 kJ/mol EA[Br] = -325 kJ/mol Born-Haber Cycle Express your answer in kilojoules per mole to four significant figures. In this cycle, the lattice energy is calculated using the following parameters, where each associated reaction is shown in the figure: ΔH[NaCl(s)], enthalpy of formation of NaCl ΔH[Cl(g)], enthalpy of formation of gaseous Cl ΔH[Na], enthalpy of formation of gaseous Na I(Na), first ionization energy of Na A(Cl), electron affinity of Cl ΔH[NaCl(s)] = -675 kJ/mol Similar reactions and energy terms can be written to correspond to the Born-Haber cycle for the lattice energy of other ionic compounds.

View Answer
divider
BEST MATCH

What amount of "total assets" will appear in the consolidated balance sheet at December 31, 2016? $4,382,400 $3,830,400 $4,062,400 $4,190,400 <-- this is the correct answer Please show work on how to get this answer. Assume that an investor acquired 100% of the voting common stock of an investee on January 1, 2009, in a transaction that qualifies as a business combination. As a result of the acquisition, the investor recognized no goodwill and no bargain purchase gain in the post-acquisition consolidated financial statements (i.e., all of the resulting Acquisition Accounting Premium relates to identifiable net assets). The investor uses the equity method to account for its pre-consolidation investment in the investee. In addition, there are no intercompany transactions between the investor and investee. The following summarized pre-consolidation financial statement information is for the year ending December 31, 2016: Income Statement: Revenues: Investor: $1,920,000 Investee: $256,000 Income from Investee: $120,000 Total Revenues: $2,296,000 Expenses: Investor: $760,000 Investee: $128,000 Total Expenses: $888,000 Consolidated net income: $1,408,000 NCI (Net income): $128,000 Statement of Retained Earnings: Retained earnings, January 1: $601,600 Net income: $760,000 Dividends declared: ($51,200) Retained earnings, December 31: $1,310,400 Balance Sheet: Investment in Investee: $232,000 Cash: $3,830,400 Other assets: $320,000 Total assets: $4,382,400 Liabilities: $2,112,000 Common stock and additional paid-in capital: $640,000 Retained earnings: $1,310,400 Total liabilities and equity: $4,062,400

View Answer
divider
BEST MATCH

Suppose the information in the following table is for a simple economy that produces only the following four goods: shoes, hamburgers, shirts, and cotton. Further, assume that all of the cotton is used to produce shirts. 2012 Statistics 2021 Statistics 2020 Statistics Quantity Price Quantity Price Quantity Price 110 $\text{55.00}$ 120 $\text{70.00}$ 120 $\text{75.00}$ 85 3.00 120 3.00 135 3.50 50 30.00 50 25.00 65 25.00 12,000 0.09 12,000 0.07 13,000 0.08 a. If the base year is the year 2012, then real GDP for 2020 equals $ (round your answer to the nearest penny) and the real GDP for 2021 equals $ (round your answer to the nearest penny). The (annual) growth rate of real GDP in 2021 is %. (Enter your response as a percentage rounded to two decimal places.)

View Answer
divider
BEST MATCH

2. After several years of hard work, you have saved $30,000 which you plan to use as a down payment on a house. You can take out a mortgage loan to finance the rest of the purchase cost and you feel that a $1,000 monthly mortgage payment would fit comfortably in your budget. If 30-year mortgage loans are available for a nominal rate of 3% per year with monthly compounding, what is the most expensive house you can afford? [Ans.: $267,190]

View Answer
divider
BEST MATCH

Evaluate the triple integral ∫∫∫ J(x+2y+a√z) dz dy dx, where z=9-x-y. Change variables to an appropriate coordinate system.

View Answer
divider