Numerade

Questions asked

BEST MATCH

English metallurgist Harry Brearley discovered that adding chromium to molten iron produced steel that wouldn’t rust, making guns less susceptible to distortion from the heat and friction of firing. true or false

View Answer

BEST MATCH

Consider a random integer selected from the range from 2 to 10.000.000.000. Approximately, what are the chances that the selected number is prime? Hint: $\ln(10)=2.30$ $1/(2.3)$ $230$ $1/23$ $.0230$

View Answer

BEST MATCH

How is Deborah and Jackie’s socioeconomic status illustrated in the story? What elements of class conflict are apparent in their situation?

View Answer

BEST MATCH

Orange juice, a raisin bagel, and a cup of coffee from Billy's Breakfast Bar cost a total of $3.25. Billy posts a notice announcing that, effective the following week, the price of orange juice will increase 50% and the price of bagels will increase 20%. After the increase, the same purchase will cost a total of $4.05, and the orange juice will cost twice as much as coffee. Find the price of each item before the increase.

View Answer

BEST MATCH

XYZ, inc. makes and sells bicycle parts. Last year XYZ sold 5,200 handlebars, generating sales of $110,000. This year they are considering a new pricing strategy with a target profit goal of $11,000. They determined that for every $2 increase to the selling price, a 300 decrease in unit sales was expected. Their total costs were $100,000 with fixed costs accounting for $69,000. This year, XYZ, inc. is considering changing the selling price to $26. What is XYZ's average selling price per handlebar?

View Answer

BEST MATCH

Which of the following is false concerning Photoheterotrophs vs Chemolithoautotrophs? Group of answer choices Photoheterotrophy occurs with anaerobic Green & Purple Non-Sulfur Bacteria & involves noncyclic photophosphorylation, basically just Photosystem I of the “Z Pathway”, with light as the source of energy, & as a heterotroph requires reduced carbon compounds to live and cannot subsist on only light and CO2. Chemolithoautotrophs use inorganic sources of energy, an electron transport chain, often with oxygen as the final electron acceptor, to pump protons & the pmf to drive ATPsynthase for ATP production, and NADPH or NADH is produced in the process or produced by reversed electron flow, and ATP & NADP(NAD)red are used by chemolithoautotrophs to fix CO2 using the Calvin-Benson cycle &2 ATP+2 NADP(NAD)red are needed to fix each CO2 like photoautotrophs All of the above are true.

View Answer

BEST MATCH

A 1.146 g mixture of the solid salts Na2SO4 and Pb(NO3)2 forms an aqueous solution with the precipitation of PbSO4. The precipiate was filtered and dried, and its mass was determined to be 0.672 g. The limiting reactant was determined to be Na2SO4.

View Answer

BEST MATCH

* If $\int_0^{\sqrt{x}} f(t)dt = [f(\sqrt{x})]^3$, determine $f(x)$. * Evaluate the following integral $I = \int_{-1}^{\infty} \left(\frac{x^4}{1 + x^6}\right)^2 dx$

View Answer

BEST MATCH

Match the description or example with the correct category of chemical agent. Chlorine gas was widely used [Choose] during World War I Causes death by respiratory [Choose] paralysis Cyanide [Choose] Causes severe burns to the [Choose] respiratory tract, lungs, and eyes

View Answer

BEST MATCH

B. CH$_3$ 1N2 OH Note that some of the carbons' hydrogen atoms are hidden, as usual; and that you are responsible for finding them. Chiral center 1 is ____ configuration (R or S?); chiral center 2 is ____ configuration.

View Answer

donna a.