As we explained in earlier chapters, thedrag force acting on a car is determinedexperimentally by placing the car in a windtunnel. The drag force acting on the car isdetermined fromwhere= measured drag force (N)F.C, = drag coefficient (unitless)p = air density (kg/m³)V = air speed inside the wind tunnel(m/s)A = frontal area of the car(m²)The power requirement to overcome the airresistance is computed byP = F,VPlot the power requirement (in kW) toovercome the air resistance for a car with afrontal area of 1.8 m², a drag coefficient of0.4, and for an air density of 1.2 kg/m³. Varythe speed from zero to 120 km/h. Also, plotthe rate of change of power requirement as afunction of speed.

Answered: Image /qna-images/answer/825316cb-7559-4a14-b57d-df27553667e2.jpg

Answered: As we explained in earlier chapters,…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Surface tension is due to uneven molecular attraction between immiscible fluid media and solid surface. Its importance is governed by dimensionless parameter Which of the Inertia force called Weber number given by We = Surface tension force™ following statements are correct? (i) Surface tension becomes important when the length scale L is small such as in ink jet printing, coating of thin film, oxygenation of water by falling rain drops. (ii) 111 Super-hydrophobicity can be achieved by micro/nano texturing of surface such as in lotus leave, butterfly and dragonfly wing. During oil spill in ocean, oil floats and spreads out due to gravity. By conservation of mass, the oil film becomes thinner as it spreads. Finally, the surface tension force becomes important causing the formation of tiny oil droplets. (A) (B) (C) (D) (i) and (ii) (i) and (iii) (ii) and (iii) All of the above
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16000 1.440 14000 1.435 12000 1.430 10000 1.425 8000 1.420 6000 1.415 4000 1.410 2000 1.405 1.400 45 15 20 25 30 35 40 Temperature ["C] +dynamic viscosity (mPas] + density (gicm") Figure 1 (a) As shown in Figure 1, viscosity and density of honey was found to decrease with increase in temperature. Explain the reasons behind these phenomenon related to Fluid Mechanics in microscopic view. Dynamic viscolsty [mPa.s] Density [g/cm³]
A::V Gmail > A docs.google.com EE Q 3: A tank filled with oil,lf the total weight is(2 KN) and weight of tank only is (200 N) and volume of the tank is (190 L) , Find : Mass density ,specific weight ,specific gravity ,specific volume for the oil. 0.947 KN/m3,9.6534 kg/m3 , 0.01035 m3/kg , 9.65 94.7 KN/m3 ,96.534 kg/m3 , 0.01035 m3/kg , 1.965 9.47 KN/m3 ,965.34 kg/m3 , 0.01035 m3/kg , 0.965 Page 2 of 2 Back Submit Never submit passwords through Google Forms. This form was created inside of Mustansiriyah University. Report Abuse Google Forms
A closed thermodynamic system consists of a fixed amount of substance (i.e. mass) in which no substance can flow across the boundary, but energy can. For a closed themodynamic system we cannot add energy to the system, via substance (E ) (1.e. matter which contains energy is not allowed across the boundary) Across the Boundaries E° = No Q = = Yes W mass NO CLOSED = Yes SY STEM m = constant | energy YES Figure 1.1. If the substance inside the thermodynamic system shown in figure 1.1. (i.e. piston cylinder device) is air, is the system a Fixed closed system Moveable closed system A. В.
Drop-load (I)This exercise is part of a series of problems aimed at modeling a situation by progressively refining our model to take into account more and more parameters. This progressive approach is very close to what professional scientists do! context We want to lower a suspended load in a controlled way, so that it hits the ground with a speed whose modulus is not too great. To do this, the suspended load (B) is connected by a rope passing through a pulley to another mass (A), which can move on a horizontal surface. To slow down the descent, we added a spring behind the mass (A). Information The masses of the charges A and B are known.The mass of the rope itself is negligible (very small compared to the loads).The pulley has negligible mass and can rotate without friction.The charge ? is initially stationary and is at a known height h.The surface on which mass A is placed is horizontal.There is no friction between mass A and the surface on which it is placed.The string attached…
Q3. (a) Explain the importance of GIS is environmental risk assessment (b) Describe the GIS requirements for environmental risk assessment (c) Use the input data in Figure Q3 to identify erosion hotspot pixels in the study area (d) Calculate the assessment accuracy based on the Nash-Sutcliff coefficient of efficiency Cells (15m by 15m) Cell с 2 Input data for soil erosion modelling Rainfall (mm) Sand (%) Silt (%) Drainage Slope (%) BRed BIRed Conservation Actual Erosion (t/h/y) 121 20 45 High 3 0.231 0.314 Fallow (0.7) 0.09 211 11 44 High 12 0.012 0.121 None (1) 0.12 DE 121 38 55 Rapid 8.1 0.181 0.712 Grass strip (0.1) 0.15 238 24 18 Slow 4.5. 0.311 0.671 Contour (0.3) 0.078 102 17 29 Moderate 7.5 0.27 0.413 Contour (0.3) 0.62 89 44 27 Rapid 5.5 0.118 0.312 None (1) 0.31 Study area G 103 23 33 Slow 6 0.071 0.232 Fallow (0.7) 0.55 H 90 55 15 Rapid 2.1. 0.082 0.32 None (1) 1.28 130 18 32 Moderate 13. 0.11 0.44 Grass strip (0.1) 1.5 ⚫ Rainfall erosivity; R = 0.715*P-6.12 (P mean annual…
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The below results are for cooling tower expirement, energy balance :energy balance of the system, that is to say, the energy taken by the air must be equal to the energy supplied by the water flow. Question : Discuss the tabulated cooling tower results... Discuss in detail format!
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