Numerade

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An unknown element has a nucleus with a charge of 2.4e and a radius of about 7.9×10−15×10−15m. How much voltage must be used to accelerate a proton (radius 1.20×10-15 m) so that is has sufficient energy to just penetrate the unknown element?

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Question 12 2 pts Since air is a mixture, it does not have a "molar mass." However, for calculation purposes, it is possible to speak of its "effective molar mass." (An effective molar mass is a weighted average of the molar masses of a mixture's components.) If air at STP has a density of 1.285 g/L, its effective molar mass is ____ g/mol.

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Talia applauds herself and sees herself as positive because she shoveled snow out of the driveway of an elderly neighbor. This is an example of the looking-glass self. cultural teaching. a social comparison. self-evaluation.

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Use Stokes' Theorem to evaluate the line integral oint_C F*Tds, where F=(:-3y,2x,z^(2):) and C is the triangle with vertices (5,0,0),(0,6,0), and (0,0,8), with positive orientation when viewed from above. Write the exact answer. Do not round. Use Stokes' Theorem to evaluate the line integral F Tds, where F =(3y, 2x, z2) and C is the triangle with vertices (5, 0, O), (0, 6, O), and (0, 0, 8), with positive orientation when viewed from above. Write the exact answer. Do not round.

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A packed column with a diameter of 2 cm diameter and 22.7 cm in height is packed with packing material having a density of 2.16 g/cm³. The mass of solid particles in the bed is 0.0352 kg and the surface-volume mean diameter of the particles is 1.5 mm. Air flows through the bed with a volumetric flow rate of 50 L/min. Data: $\rho_{air} = 1.187 \text{ kg/m}^3$, $\mu_{air} = 1.84 \times 10^{-5} \text{ kg/m.s}$ i. Calculate the void fraction ($\varepsilon$) of the bed. ii. Calculate the pressure drop across the bed. $\frac{\Delta P}{L} = 150 \times \frac{(1-\varepsilon)^2}{\varepsilon^3} \times \frac{\mu \mu_0}{d_p^2} + 1.75 \times \frac{(1-\varepsilon)}{\varepsilon^3} \times \frac{\rho_g u_0^2}{d_p}$

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4. Determine the phase angle by which $v_1(t)$ leads $i_1(t)$ and $v_1(t)$ leads $i_2(t)$, where $v_1(t) = 4cos(377t + 25^\circ) V$ $i_1(t) = 0.05cos(377t - 20^\circ) A$ $i_2(t) = -0.1cos(377t + 45^\circ) A$ 5. Find Z in the network in Figure 2.

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Use the figure to find the exact value of the following trigonometric function.\\ $\tan(\theta)$\\ $\tan(\theta) = \boxed{}$ (Simplify your answer.)

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Exercise 12 A dye laser is reported to have a CW power output of $P_{cw} = 10$ W. If the system is to be Q-switched with a pulse repetition rate of 1 kHz and a pulse width of 0.25 ms a) Estimate the instantaneous power in a Q-switched pulse b) Estimate the energy in each pulse.

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R = 93 ? Z1 = -112j ? Z2 = 51j ? R a 15<70°V 5<0°V Z1 Z2 A. 46,82 + (46,50j) B. 93,64j C. 51,00j D. 93,00 + (93,64j) b

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QUESTION 3 (20 Marks) REQUIRED Use the information provided below to answer the following questions 3.1 Calculate the unit manufacturing costs and the total manufacturing costs using the absorption costing system. (9 marks) (11 marks) 3.2 Calculate the unit overhead costs using the ABC system. INFORMATION Telco Limited manufactures 3 products viz. A, B and C. It currently operates an absorption costing system, accumulating all overheads in a single cost centre and allocates overheads to products using direct labour as the basis for allocation. Telco Limited has been advised to implement the ABC system to allocate overheads. The following is the budgeted information for the next financial year: Product A Product B Product C Total R R R R Direct materials cost 1 166400 388 800 97 200 1 650 900 Direct labour cost 1620 000 189 000 27 000 1836 000 Manufacturing overheads Machine set-ups Maintenance 2 160 000 1350000 Product A Product B Product C Units manufactured 162 000 5400 270 Direct labour hours 243 000 24 300 2 700 Machine set-ups 720 450 270 Maintenance hours 13 500 6750 2 250

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