To what extent do you think the UK Government should invest in the development of Greenhouse Gas Removal technologies? Justify your answer with reference to the arguments for and against these technologies, mentioning some examples to support your conclusions.

PLEASE DO IT IN COMPUTER

G5. Choose any three of the following:

-Milankovitch cycle

-Radiative forcing

-Ocean acidification

-Short-term organic carbon cycle

-Chlorine catalytic cycle

-Problem shifting

Food-water-energy nexus

In the context of Engineering Design and the Natural Environment, what do you understand by these terms? Write a concise paragraph explaining the meaning and significance in each case.             

PLEASE CHOOSE THE EAIEST AND THE SHORTEST THREE.

*NOTE: PLEASE TYPE THEM ON COMPUTER

The year is 2020 and the Conference of the Parties (COP26) is taking place in Beijing. Nations have finally conceded that it is no longer feasible to limit global temperature rise to 2°C by means of existing approaches based on mitigation. An alternative response to global warming is needed and three options are being discussed:

Adaptation

Geoengineering based on carbon dioxide removal

Geoengineering based on solar radiation management

Which of these do you believe should be given priority? Justify your answer.

PLEASE DO IT IN COMPUTER

The UK’s Department of Energy and Climate Change (DECC) has an annual budget of £500 million to spend on national initiatives to tackle climate change. This budget may be spent in three main policy areas: (1) mitigation, (2) adaptation or (3) geoengineering. Which area do you think should receive the largest portion of the budget? Justify your choice.

PLEASE DO IT IN COMPUTER

Outline what you understand by the following terms in the context of climate change. Give an example in each case.  

-Milankovitch cycle

-Feedback loop

-Radiative forcing                                                    

PLEASE TYPE IT ON COMPUTER

it is about plastic deformation and elastic deformation

can you explain annealed case and non-annealed case relation to workhardening and elongation with stress- strain curve
and
the reason although area decrease, force increase , can you explain this with slide, twinning, dislocations, heat change ?

Q. A hypothetical velocity field is given in Cartesian Coordinates by: V? = 4z^2t i ? 4x k where i, j and k are the unit base vectors. t is the time variable and (x, y, z) are the Cartesian Coordinates in the ( i, j , k ) directions respectively. The fluid density is constant and given by p = 1000kg/m^3

5(a) Give the (x, y, z) components of V? which are written
(u, v, w)respectively. Check whether the flow satisfies the
appropriate continuity equation and conclude whether this
flow is physically possible. Note that the general continuity
equation is given on the formulae sheet at the end exam
paper.

5(b) Give the general expression of the acceleration field from
the above velocity field in the Eulerian frame of reference
and calculate the acceleration at (t, x, y, z) = (t, ?1,5,1) and
at (t, x, y, z) = (1, ?1,5,1) .

5(c) Calculate the component of the velocity in the direction of
the vector t = 2 i + a j, written Vt (where a is an unknown constant) . This can be obtained from:
Vt = V??t/|t |

where the dot indicates the dot product of vectors and the
bold font indicates that we are dealing with vectors.

5(d) Check whether the pressure field p = 2x + y satisfies the
appropriate form of the incompressible x momentum
equation which may be derived from the equation given on
the formulae sheet at end of the examination paper. You
can neglect gravity.

What are the advantages and disadvantages of the PI controller, PD controller and PID controller ?

NOTE: please write clearly or type it in a laptop or pc

ADVANCED DYNAMICS AND CONROL SYSTEMS

methane gas CH4 enters a steady flow combustion chamber at 25 ^oC and 1 atm and is burned with 40 percent excess air, which also enters at 25 ^oC and 1 atm. After combustion, the products are allowed to cool to 25 ^oC. Assume complete combustion, determine the heat transfer per kmol of CH4

A plane wall is a composite of three materials, A, B and C. The wall of material A has uniform heat generation q˙ of 100000 W/m³, kA = 75 W/m K, and thickness LA = 60 mm. The wall material B has no generation with kB = 150 W/m K and thickness LB = 20 mm. The wall material C has no generation with kC = 100 W/m K and thickness LC = 20 mm The inner surface of material A is well insulated, while the outer surface of material C is cooled by a water stream with T= 30 °C and h = 1000 W/m² K.

1. Sketch the temperature distribution that exists in the composite under steady-state conditions.

2. Determine the temperature T0 , T1 inner and outer surface of material A and T2, T3 (outer surface of material B and C)

Design 4 bevel gears for a shaft driven bicycle. Make appropriate assumptions.

A gas turbine receives 10 kg/s of helium and expands it polytropically (n = 1.8) from 1100K and 600 kPa to 100 kPa. Determine the power produced, the entropy change of the helium through the gas turbine (kW/K) and the entropy change of the surroundings (kW/K).

An adiabatic tank, 0.5 m3, is initially evacuated and charged with steam at 500 kPa and 300 C. The final tank pressure is 500 kPa. Determine the final temperature and the entropy production.

A gas turbine receives 10 kg/s of helium and expands it polytropically (n = 1.8) from 1100K and 600 kPa to 100 kPa. Determine the power produced, the entropy change of the helium through the gas turbine (kW/K) and the entropy change of the surroundings (kW/K).

answer: 28,221 kW, 10.53 kW/K (Engineering thermodynamics)

in c++

Write a function that takes a C string as an input parameter and reverses the string. The function should use two pointers, front and rear. The front pointer should initially reference the first character in the string, and the rear pointer should initially reference the last character in the string. Reverse the string by swapping the characters referenced by front and rear, then increment front to point to the next character and decrement rear to point to the preceding character, and so on, until the entire string is reversed. Write a main program to test your function on various strings of both even and odd length.