Numerade

Questions asked

BEST MATCH

Estimate. Then find the product. 4 Estimate: ____ 827 \times 4 ____

BEST MATCH

How does the concept of stress-strain relationships in materials inform the mechanical design process, particularly in predicting material behavior under different loading conditions and ensuring structural integrity?

View Answer

BEST MATCH

A count reveals that $40 of baking supplies were used during November. What account would be debited and what account would be credited

View Answer

BEST MATCH

13. Sketch the Curve by Eliminating the Parameter. a) Sketch the curve and show the direction as t increases. b) Find the rectangular equation. x = \sin^2 t, \quad y = \cos t

View Answer

BEST MATCH

Question (4) Consider the flow of air over a small flat plate that is 12.5 cm long in the flow direction and 1 m wide. The free-stream conditions correspond to standard sea level, and the flow-velocity is 40 m/s. a) Assuming laminar flow, calculate the drag force on the plate. b) What would be the answer if the flow was assumed turbulent over the entire flat plate? c) If the length of the plate is doubled while the freestream velocity is kept constant, what will be the resulting drag? Compare the results to a) and b) and justify your answer.

View Answer

BEST MATCH

8. A hash table with 6 buckets is initially empty. The hash function is k%6. To deal with collisions, separate chaining is used. After inserting the following numbers (in this order): {10,26,12,43,54,17}, what is the state of the hash table? In this question, if numbers x, y & z form a chain, the following notation will used: x->y->z [12, 43, 26, -1->54, 10, 17] [12->54, 43, 26, -1, 10, 17] [12, 43, 26, 54, 10, 17] None of the others [12->54, 43, 26, 10, 17]

View Answer

BEST MATCH

A laser emits light of frequency 4.74 × 10^14 s-1 -The blue color of the sky is due to the scattering of sunlight by air molecules. Blue light has a frequency of about 7.5 × 10!" 𝐻𝑧. Calculate the length of wave, in nm, associated with this radiation. -Calculate the frequency and energy of blue light that has a wavelength of 400 nm.

View Answer

BEST MATCH

Problem 2.9: The Atwood Machine with Friction Let us consider a model of the Atwood machine, which consists of a square prism, ABCD, whose central axis is horizontal and perpendicular to this sheet of paper and whose face AB makes an angle Î¸ with the vertical line. On the upper faces AB and BC of the prism, there are massless bodies P and Q, respectively. As shown in Fig. 2.37, the two bodies P and Q are connected by an inextensible massless string, Si, and similar strings So and S are hung down from P and Q, respectively. Note that the string S is horizontal and strings So and S2 are vertical. Here, we assume there is static friction between body P and face AB as well as between body Q and face BC; the frictional coefficients for both cases are Î¼. Suppose bodies P and Q are always in contact with faces AB and BC, respectively. P B Q T A S2 So S1 Fig. 2.37. 1. Let the tension in string So be To. Find Ti, the minimum tension in string Si to keep body P at rest. 2. We hang Wo, a weight of mass Mo, at the lower end of string So and W2, another weight at the lower end of string S2. Find m2, the minimum mass of W2 needed to keep bodies P and Q at rest. II. We replace the square prism of Section I with an equilateral 2n-sided prism n = 2, 3, ..., and put n massless bodies on the n upper faces of the 2n-sided prism. They are connected by inextensible massless strings as in Section I. All the strings are taut. The angle between each face of the 2n-sided prism and its corresponding string is Î¸. The coefficient of static friction between each body and its corresponding face of the 2n-sided prism is assumed to be equal to that in Section I, Î¼.

View Answer

BEST MATCH

Please help with e and f. Chromium from a mine in Limpopo is sent to the Johannesburg mine for analysis. The scientist extracts the Cr from 0.500 g of sample. She then dissolves the Cr in 5.0 mL of acid and dilutes it to 50 mL. She then prepares a series of standards from a 250.0 ppm solution that was made in 500.00 mL from Cr(NO3)3â€¢3H2O. She analyzed the standards and the samples using Atomic Emission Spectroscopy. The data obtained is given below: Standard 1 2 2.5 1.36 3 5.0 2.36 4 5 20.0 4.76 Cr concentration / ppm 0 10.0 3.86 d. What mass of Cr(NO3)3â€¢3H2O was used to make the standard solution? e. Use the graph paper provided on the last page to plot the calibration curve and find the equation of the calibration curve. f. The sample from Limpopo had an absorbance of 0.87. Determine the Cr content in the sample. Express your answer in mass %.

View Answer

BEST MATCH

If the cross elasticity of demand between milk and yoghurt is -1.5, then are milk and yoghurt substitutes or complements? Select one: a. They are substitutes because when the price of yoghurt increases by 10% for example the demand for milk decreases by 15%. b. They are complements because when the price of yoghurt increases by 10% for example, the demand for milk increases by 15%. c. They are substitutes because when the price of yoghurt increases by 10% for example the demand for milk increases by 15%. d. They are complements because when the price of yoghurt increases by 10% for example, the demand for milk decreases by 15%.

View Answer

sandra t.