Other Engineering Answers

A vessel with a volume of 0.03 m3 contains saturated vapor at a pressure of 17 bar. Determine the mass of the vapor and having found the mass value, what is the enthalpy? and also explain why X (quality) = 1

Ball thrown vertically from 12 m level in elevator
shaft with initial velocity of 18 m/s. At same
instant, open-platform elevator passes 5 m level
moving upward at 2 m/s.
Determine (a) when and where ball hits elevator and
(b) relative velocity of ball and elevator at contact.

Question 7
Your boss is a biologist who needs wood samples from long-leaf pine trees with a fungal disease which is only visible under a microscope, and she sends you on an assignment to collect the samples. She wants at least 50 different diseased samples. She tells you that approximately 28% of long-leaf pine trees currently have the fungal disease. If you sample 160 long-leaf pine trees at random, what is the probability you’ll have at least 50 diseased samples to return to your boss? (Use the normal approximation to calculate this probability and chose the closest answer to the question.)

Write a comparative study between substitutional impurity, screw
dislocation and grain boundaries. Explain why and how they are
created, how they affect the material properties, and if they can be
controlled and put into use.

Suppose, W weight fraction of “A” has been added to “B” to make an
alloy. At room temperature (01), “B” has a resistivity of 21. Find the
current density as a function of the weight fraction W when the applied
electric field “E” is kept constant. Assume that 34  35 are the
atomic masses of “A” and “B” respectively and  is the atomic
concentration of “B”.

Copper (Cu) has FCC crystal structure. Atomic mass of Cu is 63.55
gmol-1 and radius of a copper atom is 0.128 nm, mean speed of
conduction electrons in Cu is 1.5 × 10' () and frequency of
vibration of the Cu atoms at 27 ° is 4 × 10). (). Nordheim’s
Coefficient of Au in Cu is 5500 Ω − .
a) Calculate the atomic density of copper
b) Estimate the drift mobility of electrons in Cu
c) Find the resistivity of pure Cu
d) Find the resistivity of Cu if 1 at.% of Au is mixed in Cu.

An examination paper has 8 questions to be answered and there are 1000 answer books.
Each answer takes 3 minutes to correct. If 4 teachers are employed to correct the papers in
a pipeline mode, how much time will be 2 | P a g e taken to complete the job of correcting
1000 answer papers? What is the efficiency of processing? If 8 teachers are employed
instead of 4, what is the efficiency? What is the job completion time in the second case?
Repeat with 32 teachers and 4 pipelines.

On January 28, 1986, the Space Shuttle Challenger was destroyed upon launch from Cape Canaveral, Florida killing all seven astronauts on board. Conduct an Internet search on the topics of the Challenger disaster and groupthink. Then, discuss how groupthink might have created decision-making problems for NASA and its booster contractor.

Students arrive one at a time, completely at random, to an advice clinic at a rate of 10 per hour.
Students take an average of 5 minutes of advice but there is wide variation in the time they need; this
variation may be well modeled by the exponential distribution.