In a hexagonal close-packed (HCP) material, let a represent the interatomic spacing within a close-packed layer (plane), and let c represent the lattice parameter normal (perpendicular) to these layers. There are two close-packed layers stacked along c in the conventional unit cell, as described in Lecture 3. (i) Find an expression for a in terms of the atomic radius R. (ii) Now imagine the same close-packed layers, made from the same atoms as before (i.e. R does not change), but now stacked to form a cubic close packed (CCP) material. There are three close-packed layers stacked along the body diagonal of the conventional face centered cubic (FCC) unit cell of CCP material. Find an expression that relates the atomic radius R to the close-packed layer spacing in this unit cell. (Hint: both R and the close-packed layer spacing can be written in terms of the length of any edge of the FCC unit cell.) (iii) Use your answer from (ii) to obtain an expression that relates c to R in the HCP structure. (iv) Use your answers from (i) and (iii) to show that c/a ~ 1.633 in perfect HCP materials. (v) Many HCP materials do not have this ideal value of c/a. What is the practical significance / consequence of departures from the ideal c/a value?

A vessel initially contains 5.0 kg of liquid water and 2.0 kg of ice at 0 C. Energy is added until the ice has just melted. The temperature at the boundary where heat transfer occurs is taken to be the system temperature during the process. The enthalpy of melting ice is 333.5 kJ/kg. Consider the following processes used to melt the ice.

a.) Heat is added to from the environment at 20 C. Determine the entropy flux and the total entropy generation, both in kJ/K.

b.) Heat is added from a reservoir at 727 C. Determine the same quantities as in part a.

c.) Paddle-wheel work is used to change the state. Determine the total entropy production for the process, in kJ/k.

d.) Comment on the relative degree of irreversibility for the three processes.

Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s.


Determine:

(a) the net power developed, in kW.

(b) the rate of heat transfer to the steam passing through the boiler, in kW.

(c) the percent thermal efficiency.

(d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature increase of 18°C with negligible pressure change in passing through the condenser.

1. If you know the measured electrical voltage and the cross-sectional area of the pipe/tube you can determine the volume? T/F

2. In order to use the electromagnetic type of meter what kind of fluid must be flowing through the meter in order to induce an electrical voltage between the electrodes? T/F

3. By increasing the cross-sectional area of the restriction, one can significantly increase the flow velocity. T/F

4. The higher the flow velocity and the resulting pressure drop around the restriction, the greater the differential pressure measured by the sensor. T/F

5. Using a Coriolis meter is the only way the particular X of mass flow, density, volume flow, and flow velocity can be measured simultaneously.

a. Process Variables

b. Measurements

c. Phases

d. Process technique

6. When sensors in this kind of flow meter sense a change in tube oscillation what is this phenomena called?

7.The frequency of the changing zones of pressure corresponds to the X of passing vortices.

8. Total flow can be calculated since the distance between two consecutive vortices corresponds to a defined volume.

9. The differential transit times of the signals going upstream and downstream is a direct measure of (X).

10. When there is no flow, the signal transit times between ultrasonic sensor pairs are X upstream and downstream.

a. Not Applicable

b. same

c. different

11. Thermal meters use principles of X in order to determine various flow process variables

a. fluid dynamics

b. heat generation

c. heat transfer

d. thermodynamics

12. The amount of energy required to maintain the desired temperature difference is proportional to the cooling effect, and therefore, it is a direct measure of the mass flow rate. T/F

13. It is critical to the measurement that any flow meter is installed in such a manner that is kept full of fluid at all times. T/F

14. Laminar flow is the most desirable for flow measurements in pipes T/F

15. ________occurs when piping systems contain bends in multiple directions in succession.

For this activity, your assignment is to develop and complete a guide to materials handling hazards and controls. You will need to develop a document that includes the following sections:

General Materials Handling

Manual Materials Handling

Jacks

Hand-Operated Materials Handling Vehicles

Powered Vehicles and Forklifts

Hoisting Apparatus

Ropes, Chains, and Slings

Conveyors

Elevators, Escalators and Manlifts

Bulk Materials, Excavation and Trenching

Storage of Materials

For each section, you should make a list of hazards and controls. You can make a bulleted list and include the items under two sections (hazards & controls) under each main section (1-11 above). This sheet should then be saved and submitted for a grade. The document does not have to be submitted in APA format. This is a document that you should utilize as a pocket guide as a safety professional. The document can also be utilized to develop inspection and possibly audit forms to identify and assess hazards associated with materials handling in work environments. The information can also be used to recommend controls for identified hazards. The information in your guide should be derived from your course text, supplement readings and other published resources and technical documents on the subject matter.

create a questionaire that can be used to compile a report for the assignment below

"The students are expected to visit any company of

their choice and find out how they do their

maintenance budget. Conduct interviews with va

rious levels of personnel. The student is

expected to present a typed three- pages report

(detailed report) toget

her with the completed

interview question with responses from

the company maintenance personnel.

Company maintenance budget must be attached to

the report. Proof of

authenticity must

accompany the material; a lette

r from the person/s interviewe

d or consulted will suffice".

For this question (Determine the velocity of the 60 kg block A if the two blocks are released from rest and the 40 kg block B moves 0.6 m up the in cline. The coefficient of kinetic friction between both blocks and the inclined planes is = 0.05.), how is T(2) = 110 V(a)^2 instead of T(2) = -50V(a)^2

Management for Engineers

- You intend to set up an automotive workshop. The workshop provides services such as general vehicle repairs, tyre checks and other related works.

Describe the steps, procedures,considerations and processes you will take to set up the workshop and to make it an effective enterprise?

Format:
-Times New Roman 12
-At least 20pages
-should have the basic things which is introduction, reference and etc

MATLAB based problem: Create a motoring model for the engine with the following specifications, and plot the in-cylinder pressure against (i) cylinder volume and (ii) crank angle degrees (20 points)  Bore = 107mm, stroke = 124mm, compression ratio = 17.3, Length of connecting rod = 192mm. Assume the ratio of specific heats is 1.4 (constant), atmospheric pressure is 1 bar and ambient temperature is 298 K.

Management For Engineers

You intend to set up an automotive workshop. The workshop provides services such as general vehicle repairs,servicing,tyre checks and other related works.

Describe the steps, procedures, consideration and processes you will take to set up the workshop and to make it an effective enterprise?

Format: at least 20 pages, Times New Roman 12

You are to present a research proposal with regards to the topic of "Investigation of the Mechanical Properties of Atherosclerotic Plaque Tissue", however for this to be successful, a "good" research question(s) must be made. Give examples of "good" research question(s) to motivate the said topic and go further from here. The idea need not to be original but should be researchable and presentable to fellow academics. The Internet is there at your disposal. It is important to take into consideration that this research question(s) can define the topic, define the research nature of the research endeavour (i.e. to explain, to discover, to describe, to compare etc.), define the questions of interest (i.e. who, what, when, why or how etc.), define the constructs and variables and what their effects are.

Consider a small Pelton wheel hydro turbine, with a total head (reservoir surface to nozzle elevation difference) of Ht = 200 ft. The flowrate to the turbine is 185 gal/s. If the pipe (penstock) feeding the turbine has a length of 1000 ft, a diameter of 19.6 in, and a friction factor of f = 0.005, determine the percent of total head lost in the pipe (penstock). Submit your answer as a percentage but without the percent symbol. ***NOTE: The value of the friction factor f is consistent with the definition in our textbook (and may differ from other textbooks). Using our textbook's notation, you could also use f' = 4f = 0.02.***