A major application of ferro- and ferrimagnetic materials is in transformer and motor cores. Materials are required that are magnetically soft (high permeabilities – they are magnetized easily at low applied fields and a low coercive field) with large power-handling capacity and low losses. Why cannot pure iron metal be used in transformer cores?

Account for the magnetic behavior of the following spinels:
(a) ZnFe2O4 is antiferromagnetic
(b) MgFe2O4 is ferrimagnetic and its magnetic moment increases with temperature

c) MnFe2O4 is ferrimagnetic and its magnetic moment is independent of temperature

equation of motion

Material Science:

If you were to be given a DSC (Differential scanning calorimetry) trace of a polymer, how would you identify changes and characteristics of the polymer? I understand this is a vague question, but please try your best, I'm lost!

Thermodynamic

In a piston-cylinder air at 100 kPa and 15°C undergoes the following cycle. First, it is compressed isentropically to a compression ratio of 20. Then 1800
kJ/kg of heat is transferred to the air at constant pressure. Afterwards the air expands isentropically. In the last step, heat is removed at constant volume until the air reaches its original state. Assuming air behaves as an ideal gas and with Cp and Cv independent of temperature, determine the:
(a) pressure and temperature at each point in the cycle,
(b) thermal efficiency of the cycle, and
(c) mean effective pressure.

Please work by step and orderly to easy work

Define hardness, and explain the variation of hardness with respect to the slip systems in the material.

A Carnot heat engine within a piston cylinder has 10 kg of air as the working fluid and operates between 1000 K and 350 K. During the heat addition process the pressure changes by a factor of 2.5. The volume at the end of the isentropic compression process is 5m^3. Determine the pressure at each state in kPa and the net heat of the cue in KJ assuming Constant Heats at 300 K. Draw a P-v and T-s diagram

So what is the basic definition of Mechanical and Electrical Systems? In addition, what does the word "energy" mean?

This is for a VF-30 Bonfiglioli worm drive Gearbox

6.1 Housing

6.2 Worm Gear

6.3 Worm Shaft

For each of the MAJOR components (6.1, 6.2 and 6.3) stated only, analyze and identify the manufacturing processes used to make the component – both primary (bulk shape forming) and secondary (or finishing) processes. Include sub-sub-section as follows for each component:

o 6.1.1 Component Observations: Describe your observations of the physical component which indicate what manufacturing processes were performed. Include an annotated picture with arrows pointing to the features.

o 6.1.2 Manufacturing Process: With supporting literature and research, describe the chosen manufacturing process concisely in detail, noting its advantages and disadvantages – describe it in the context of the gearbox you are looking it, not just generally. Detail the advantages and disadvantages of these processes: Relate the chosen method to the production volume of the gearbox.

o 6.1.3 Material Relationship: Relate to the material and its appropriateness in this manufacturing method (e.g. does it have suitable castability?)

A rail-gun fires a tungsten projectile horizontally with an exit muzzle velocity of 1500 m/s. The horizontal acceleration of the projectile is given as ax = -40vx^2 + 125000vx - 96900000 where vx = horizontal velocity. The muzzle is 50 meters off the ground. At what distance, in meters, from the muzzle will the projectile strike the ground if the ground remains level? Do not neglect the effects due to gravity.

Please help, I don't understand how to do this problem since acceleration in the x direction is not constant.

4- If the drag force on a smooth sphere depends on the velocity (V), sphere diameter (D), viscosity (?), and density (?), use dimensional analysis to show the drag coefficient on the sphere is a function of the Reynolds number only. (15%) ?

Explain How fuel system components works:

Booster pump-

Jet Pump-

Surge tank-

Crossfeed valve-

Jettison valve-

Capcitance fuel gauge-

What is the purpose of a throttling valve? What are the implications of having a throttling valve prior to the pump inlet? Explain in terms of NPSH. i.e. what will happen if the valve is placed before the pump? or why do we put the valve after the pump instead of before the pump.

A seismic instrument (a mass connected to a spring and a damper) is employed to record a periodic input signal y(t)=0.5cos(15?t), where y = displacement [cm], t = time [sec]. The damping ratio of the instrument is 0.6. Select a combination of mass, spring constant, and damping coefficient to yield less than a 5% amplitude error in measuring the input signal.

Consider 50 moles of carbon dioxide in a piston-cylinder that is isothermally compressed at temperature of T=350 K from 100 kPa to 400 kPa. What are the changes in the total entropy (of the Universe), the system, and the surroundings if the gas is compressed using a heat reservoir at a temperature of 350 K? Using a heat reservoir at a temperature of 250 K? You can assume that the processes within the piston-cylinder system are internally reversible.

10–15E A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 2500 psia in the boiler and 5 psia in the condenser. What is the minimum temperature required at the turbine inlet such that the quality of the steam leaving the turbine is not below 80 percent. When operated at this temperature, what is the thermal efficiency of this cycle?