Describe the role of a technical workstream lead along with the required and desired skills to be successful in this position. As part of your description include an example of an actual position.
In: Mechanical Engineering
In the Scanning Electronic Microscope (SEM ), how electrons are scattered from the sample (elastic and inelastic)?
In: Mechanical Engineering
Explain how the cells of the sponge communicate with each other. (Hint: Relate this to the makeup of the cell membrane.)
In: Mechanical Engineering
What is the heat treatment of metals? what is the benefit of it? why and how it's useful?
Please answer in details, please do not write by hand.
In: Mechanical Engineering
A sample of 1095 steel is heated to 1500 degrees
Fahrenheit. It is cooled to 500 degrees Fahrenheit in one second.
Then, it is held at 500 degrees Fahrenheit for 10 hours. Finally,
it is cooled to room temperature in one hour. What is the final
structure of the steel?
What is the range of hardness values for the sample of
1095 steel?
In: Mechanical Engineering
What are the operational steps ofa work cycle?
Identify activities and process parameters for each step of the operation.
In: Mechanical Engineering
1:Find the convolution output volume size of layer 2 (W2xH2xD2) and 3 (W3xH3xD3)
2: Find the convolution output volume size of layer 2 (W2xH2xD2) and 3 (W3xH3xD3)
3: Find the output volume size of output pooling layer (W2xH2xD2)
In: Mechanical Engineering
A facility that manufactures fireworks has a large increase in production every June, such that their peak electrical demand is 101, while in every other month of the year their peak electrical demand of 50. The local utility informs the client that they will be changing the rate structure. The demand charges will decrease from $7.54/kW to $5.37/kW. But the utility will start imposing a ratchet clause at 80% of peak demand. What will be the expected change in annual demand costs for the facility? (When entering your answer, please note that a positive # indicates that the facility costs will increase, whereas a negative # indicates that the facility costs will decrease.)
In: Mechanical Engineering
State the elements that are common to all mechatronic systems and state their purpose.
In: Mechanical Engineering
How come in free fall you feel weightless even though gravity is pulling down on you? (ignore air resistance when answering this question).
In: Mechanical Engineering
How does inserting parts to form subassemblies save time in documenting designs?
In: Mechanical Engineering
In class, we learned that ”most” of the sun’s radiation happens in the band 0.2 ? ? ? 3µm, and Stephen asked what ”most” means. What proportion of solar radiation (for a black body sun) falls in the above wavelength range. Similarly, what proportion of the Earth’s radiation (black body Earth at 290K) occurs in the wavelength band 4 ? ? ? 40µm? What wavelength range contains the middle 95% of the sun’s radiation?
In: Mechanical Engineering
For the solidification of pure gold, calculate the critical radius (r*) and the activation freeenergy (\Delta G?G*). Assume homogeneous nucleation conditions. The values of the latent heat of fusion and the surface free energy are -1.16x109 J/m3 and 0.132 J/m2, respectively. The degree of supercooling is 230 K and the melting point of gold is 1064 oC.
In: Mechanical Engineering
what is the enthalpy value of steam at 1.9 MP and 290 C?
In: Mechanical Engineering
Oxygen is contained in a piston-cylinder system initially at a temperature of 40 oC and a pressure of 150 kPa. The piston is 1 m in diameter and initially 20 cm above the base of the cylinder. Heat is added at constant pressure until the piston has moved 30 cm, so it's now at 50 cm.
I found the mass of the system to be 0.2898 kg, and T2 = 783K.
a) Using the table of properties of oxygen as an ideal gas, calculate the heat added to the system per unit mass, in kJ/kg
b) Repeat this calculation assuming that the specific heat as a function of temperature is linear over this range of temperatures (ie, assuming the change in temperature is "small")
c) Repeat this calculation without this assumption (ie, direct integration of empirical relation)
In: Mechanical Engineering