Write random effects in the following systems.

1)Traffic intersection (2)Railway station (3) Inventory System

What is involute? Draw an involute with string length more than the cicumference of the corresponding circle

a copper plate .25m in diameter at 150C is to be cooled on one side, in air with ambient temprature of 25C and h=30W/m^2k, by attaching 30 copper pin fins each 0.02m diameter and 6cm long. to the surface.calculate overall heat transfer rate and overall effectiveness

Please show simple calculations:

Problem:

Computer cooling is required to remove the waste heat produced by computer components, to keep components within permissible operating temperature limits. Components that are susceptible to temporary malfunction or permanent failure if overheated include integrated circuits such as Central processing units (CPUs), chipset, graphics cards, and hard disk drives. Cooling may be designed to reduce the ambient temperature within the case of a computer, such as by exhausting hot air, or to cool a single component or small area (spot cooling). Components commonly individually cooled include the CPU, Graphics processing unit (GPU) and the northbridge. Compare different techniques used to cool desktop computers in a Caribbean environment using a thermodynamic analysis. Get basic calculations of each technique.

Please be clear in explanation!

1. Define density, mass, weight, and specific gravity. A room is 4m wide, 5m long, and 3m high. Air pressure in the room is 110 KPa absolute and the temperature is 27C. Assuming ideal gas behaviour, determine the mass, density, and specific gravity of the air using water as reference density. (The density of water is 1000kgm-3, the molar mass of air is 29g/mol, and R=8.314 J/(kg mol)).

Let the minimum fresh air requirement for the room be 9.0 Air Change Rate per hour. That is, the complete air filling the room is completely changed 9.0 times in one hour. If the ventilation requirement is met entirely by a fan calculate the volume flow rate per hour (m3/hour) required. Determine the flow capacity of the fan in m3/s. Determine the fan casing diameter if the velocity is not to exceed 6 m/s.

2

(a) Write the expression for Fick’s first law of diffusion and explain the terms in the equation in one sentence each. Illustrate and explain the concentration gradient as a function of distance in 3-4 sentences.

b) Write down the solution for Fick’s second law of diffusion. Explain all the terms in a sentence. Denote the concentration terms in the equation (C_s, C₀ and C_x) in a schematic showing a concentration gradient profile. (In other words, sketch a typical concentration profile and explain the above terms with the help the schematic) What is the primary difference between Fick’s first law and second law of diffusion?

the name of the book is the science andn engineering of materials seventh edition, and please type your answer so that i can copy it and paste it

Consider the velocity potential phi = -k( y^2 - x^2 ) where k is a constant. This velocity potential is commonly used to describe flow impinging upon a plate. Derive an equation for dP/dy, the pressure gradient in the y-direction, if the fluid has density, rho.

A quality mixture of water is contained in a piston cylinder system at a pressure of 3 bar. The initial volume of the system is 3 m3, and saturated liquid occupies 0.3 m3. Heat is added to the system and the volume is allowed to triple before a stop is reached. The final state of the system is at pressure of 30 bar. If the external pressure is 1 bar determine the followng: (a) The amount of heat added to the system; and (b) the amound of work performed by the system.

A 1 036-kg satellite orbits the Earth at a constant altitude of 110-km. (a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 194 km? MJ? (b) What is the change in the system's kinetic energy? MJ? (c) What is the change in the system's potential energy? MJ?

Consider 0.8 kg of N₂ at 300 K, 1 bar contained in a rigid tank connected by a valve to another rigid tank holding 0.3 kg of CO₂ at 300 K, 1 bar. The valve is opened and gases are allowed to mix, achieving an equilibrium state at 290 K.
Determine:
(a) the volume of each tank, in m³.
(b) the final pressure, in bar.
(c) the magnitude of the heat transfer to or from the gases during the process, in kJ.
(d) the entropy change of each gas and of the overall system, in kJ/K.

Suppose that the gears in Figure 15.28 (page 669 of textbook) are identical, each having an 8-in diameter, 80 teeth and 20° pressure angle. Assume that their finish and accuracy correspond to about the best that is commercially obtainable with a shaping cutter. (a). Which of the gears is the most vulnerable to tooth-bending fatigue failure? Why? (b). If the motor rotates 1200 rpm, determine the proper values for V, P, p, Kv, and J.

(Figure Numbers are from Juvinall and Marshek, Fifth Edition)

The accessory drive unit of a large aircraft engine involves an identical pair of 20° full-depth spur gears. The gears have 50 teeth and rotate together at 5000 rpm. The diametral pitch is 12 and the face width 1.5 in. The gears are made of alloy steel, casehardened to 62Rc (680 Bhn). Although the case extends throughout the fillet, it is conservatively decided to use the core hardness of 500 Bhn for calculating bending fatigue strength. The tooth profiles are finished with a fine-grinding operation that gives a degree of precision justifying the use of curve A of Figure 15.24 and the assumption that teeth share the load. The loading involves only very mild shock, justifying the use of Ko = 1.1.

(a). Estimate the horsepower that can be transmitted with 99% reliability, based on tooth bending fatigue.

(b). Estimate the horsepower that can be transmitted for 109 cycles with 90% reliability, based on surface fatigue.

Briefly describe and explain the driving force for the electrochemical crevice corrosion happened in the riveted structure in water, as shown in Figure 17.16 in Callister 9th Ed. Book, use Nernst equation as you see necessary.

Use MATLAB DSOLVE to solve the folloing ODE and plot it:

300x'' + 60x' + 6840 = f(t)

Write a MATLAB function that uses my_sine(x,n) to plot the approximation of the sinefunction from−3π/2 to 3π/2 with increments equal to Δx,where Δx and n(the number ofterms used in the series approximation) should be input arguments of the function andshould be specified by the user.