Numerade

Questions asked

INSTANT ANSWER

(a) Compute the covariance for $X$ and $Y$ in Exercise 24 (b) Compute $a$ for $X$ and $Y$ in the same exercise

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ANSWERED

Adriano Chikande

Numerade educator

Coherent light that contains two wavelengths, 660 nm (red) and 470 nm (blue), passes through two narrow slits that are separated by 0.300 mm. Their interference pattern is observed on a screen 4.00 m from the slits. What is the distance on the screen between the first-order bright fringes for the two wavelengths?

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INSTANT ANSWER

Draw the product formed when pentanal (CH$_3$CH$_2$CH$_2$CH$_2$CHO) is treated with each reagent. With some reagents, no reaction occurs. a. NaBH$_4$, CH$_3$OH b. [1] LiAIH$_4$; [2] H$_2$O C. H$_2$, Pd-C d. PCC e. Na$_2$Cr$_2$O$_7$, H$_2$SO$_4$, H$_2$O f. Ag$_2$O, NH$_4$OH zx g. [1] CH$_3$MgBr; [2] H$_2$O h. [1] C$_6$H$_5$Li; [2] H$_2$O i. [1] (CH$_3$)$_2$CuLi; [2] H$_2$O j. [1] HC=CNa; [2] H2O k. [1] CH$_3$C=Cli; [2] H$_2$O I. The product in (a), then TBDMS-CI, imidazole

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ANSWERED

Prabhat Tyagi

Numerade educator

Draw the structures and label the type for all the isomers of each ion. a. [Cr(CO)3(NH3)3]3+ b. [Pd(CO)2(H2O)Cl]+

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ANSWERED

Satyam Gupta

Numerade educator

Real Estate Financing Cody Westmoreland wishes to sell a piece of property for $\$ 240,000 .$ He wants the money to be paid off in two ways-a short-term note at $2 \%$ interest and a long-term note at $2.5 \% .$ Find the amount of each note if the total annual interest paid is $\$ 5500$.

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ANSWERED

Umar Sohail Qureshi

Numerade educator

For $t<0,$ an object of mass $m$ experiences no force and moves in the positive $x$ direction with a constant speed $v_{i}$ . Beginning at $t=0,$ when the object passes position $x=0$ , it experiences a net resistive force proportional to the square of its speed: $\overrightarrow{\mathbf{F}}_{\text { net }}= m k v^{2} \hat{\mathbf{i}},$ where $k$ is a constant. The speed of the object after $t=0$ is given by $v=v_{i} /\left(1+k v_{i} t\right)$ (a) Find the position $x$ of the object as a function of time. (b) Find the object's velocity as a function of position.

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ANSWERED

Ivan Kochetkov

Numerade educator

A stone is dropped from the roof of a high building. A second stone is dropped 1.50 s later. How far apart are the stones when the second one has reached a speed of 12.0 $\mathrm{m} / \mathrm{s} ?$

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INSTANT ANSWER

In Exercises $9-12,$ use the graph of the function to find the domain and range of $f .$

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INSTANT ANSWER

You are hired as a consultant to a monopolistically competitive firm. The firm reports the following information about its price, marginal cost, and average total cost. Can the firm possibly be maximizing profit? If not, what should it do to increase profit? If the firm is maximizing profit, is the market in a long-run equilibrium? If not, what will happen to restore long-run equilibrium? a. $P < MC, P > ATC$ b. $P > MC, P < ATC$ c. $P = MC, P > ATC$ d. $P > MC, P = ATC$

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ANSWERED

Ma Ednelyn Lim

Numerade educator

Which oxide is more basic, MgO or BaO? Why?

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Michael F.