Numerade

Questions asked

BEST MATCH

A very long thin wire produces a magnetic field of $2 \times 10^{-3} \times 10^{-4}$ T at a distance of 3 mm. from the central axis of the wire. What is the magnitude of the current in the wire? ($\mu_0 = 4\pi \times 10^{-7}$ T $\cdot$ m/A) 0.67 mA 9400 mA 3.0 mA 1300 mA

View Answer

BEST MATCH

A diode that exhibits high resistance in both directions when measured with an ohmmeter is: shorted leaky open a properly operating diode

View Answer

BEST MATCH

Samples of DNA are collected, and the four DNA bases of A, G, C, and T are coded as 1, 2, 3, and 4, respectively. The results are listed below. Construct a 9090% confidence interval estimate of the mean. What is the practical use of the confidence interval? 22, 22, 11, 33, 44, 33, 44, 44, 33, 11 Question content area bottom Part 1 What is the confidence interval for the population mean muμ? 2.12.1less than

View Answer

BEST MATCH

In Q4 of 2007, what was the amount of the trade deficit in annualized trillions of dollars? Round to two decimal points: 1.349 is rounded to 1.35 and 0.50 is 0.50 (not 0.5 or .5)

View Answer

BEST MATCH

The two glasses are in proportion. Proposition. 2 + 5. What is the width of the larger glass?

View Answer

BEST MATCH

Rank the following pure molecular substances in decreasing order of total number of individual molecules present in the sample. (1-most molecules, 4 fewest molecules). Most Molecules 1 $1g O_2$ 2 $1g NH_3$ 3 $1g CH_4$ 4 $1g H_2$ Fewest Molecules 1 point Calculate the number of moles of carbon atoms in 0.0293 kg of carbon. Report your answer to 3 significant figures without the unit. Example 1.00 Type your answer..

View Answer

BEST MATCH

(See Q 2.17) A single-phase load consists of a parallel connected 25 ohm resistor and an inductor with a 85 ohm reactance is connected to the 240V mains, calculate the input real power P (in W) and the input reactive power Q (in VAr). For the purposes of checking your answer in this on-line test, add the numerical values of P and Q together and enter this below (this answer has no physical meaning). (if you have difficulty, try practice question 2.17.)

View Answer

BEST MATCH

1. Employ the Newton-Raphson method to determine a real root for f(x) = x^3 + 4x^2 - 10 using an initial guess of x_0 = 5.0000. Perform the computation until \epsilon_a \leq 0.0001%. Abs Error = ((Xr_{new} - Xr_{old}) / Xr_{new})*100%. Please show sample computations for the 1st 3 iterations for X variables and the last 3 iterations for the Abs error computations. 2. Use secant method to determine a root of f(x) = x^4 - x - 10 with initial guesses of x_{-1} = 1 and x_0 = 2.0. Perform the computation until \epsilon_a \leq 0.0001%. Abs Error = ((Xr_{new} - Xr_{old}) / Xr_{new})*100%. Please show sample computations for the 1st 3 iterations for X variables and the last 3 iterations for the Abs error computations.

View Answer

BEST MATCH

Miller Industries makes tennis balls. Miller's only plant can produce up to 3.6 million cans of balls per year. Current production is three million cans. Annual manufacturing, selling, and administrative fixed costs total $1,200,000. The variable cost of making and selling each can of balls is $3. Stockholders expect a 16% annual return on the company's $4 million of assets. Requirement 1: What is Miller Industries' current total cost of making and selling three million cans of tennis balls? What is the total cost per unit of making and selling each can of balls? (Enter the total cost per can to the nearest cent) Plus: Requirements Current total costs Divided by: Total cost per can What is Miller Industries' current total cost of making and selling three million cans of tennis balls? What is the total cost per unit of making and selling each can of balls? Assume that Miller Industries is a price-taker and the current market price is $1.35 per can of balls (this is the price at which manufacturers sell to retailers). What is the target total cost of producing and selling three million cans of balls? Given Miller Industries' current total costs, will the company reach stockholders' profit goals? If Miller Industries cannot reduce its fixed costs, what is the target variable cost per can of balls? Suppose Miller Industries could spend an extra $860,000 on advertising to differentiate its product so that it could be more of a price-setter. Assuming the original volume and costs, what price does Miller Industries want to charge for a can of balls? Tennis Shop has just asked Miller Industries to supply 500,000 cans of balls at a special price of $1.20 per can. As a result, Miller Industries will have to spend $8,000 to change the packaging machinery. Assuming the original volume and costs, should Miller Industries accept this special order? Assume that Miller will incur variable selling costs as well as variable manufacturing costs related to this order.

View Answer

BEST MATCH

3.) (30 pts) A plane wave traveling in air (free space), is written as $\vec{E}_i = \hat{y}20e^{-j(\sqrt{3}x+z)}$ is incident on a planar surface of dielectric material with $\epsilon_r = 4$ and occupies the half- space, $z \ge 0$. Hint: for this problem, use the general expression $\vec{E} = \vec{E}_0e^{-jk\cdot\vec{r}}$, where $\vec{k} = \hat{x}k_x + \hat{y}k_y + \hat{z}k_z = k\hat{k}$, $\vec{r} = \hat{x}x + \hat{y}y + \hat{z}z$, and determine values for $k_x$, $k_y$, and $k_z$ (some of which can be equal to zero) using the above expression. Determine the following: a. the polarization of the incident wave (perpendicular, parallel or otherwise), b. the angles of incidence and transmission (expressed in degrees) c. the frequency, in Hz, of the incident field d. the time-domain expression for the incident electric and magnetic fields e. the phasor expression for the transmitted electric and magnetic fields f. the average power density carried by the wave into the dielectric medium

View Answer

bryan b.