Question
In: Mechanical Engineering
13.0 (20 pts) An electroplating process will be used to coat the exterior surface of a...
13.0 (20 pts) An electroplating process will be used to coat the exterior surface of a 160 mm diameter x 1.5 meter long cylinder with silver. Determine the time in minutes to electroplate silver to a thickness of 0.06 mm if the plating current is 15 amps.
Solutions
samet mamat answered 2 years agoRelated Solutions
13.0 (20 pts) An electroplating process will be used to coat the exterior surface of a...
13.0 (20 pts) An electroplating process will be used to coat the
exterior surface of a 160 mm diameter x 1.5 meter long cylinder
with silver. Determine the time in minutes to electroplate silver
to a thickness of 0.06 mm if the plating current is 15 amps.
A new process will be testing for electroplating nickel. The current process is tested on thirty...
A new process will be testing for electroplating nickel. The
current process is tested on thirty slugs, and the mean thickness
of the nickel is 0.0020 m with a sample standard deviation of
0.0005 m. The new process is also tested on thirty slugs remaining
a sample mean of 0.0022 m and a sample standard deviation of 0.0003
m. Assume equal variances.
(a) Does the new process result in a greater thickness of
nickel? Use α = 0.05. (b) Determine...
A control chart is used for a painting process to monitor the surface imperfections of a...
A control chart is used for a painting process to monitor the
surface imperfections of a metal toaster oven cover. The inspection
is on a random sampling basis with 10 covers forming a subgroup.
The most recent 20 subgroups contained 180 imperfections. Please
determine the control limits for the appropriate chart.
Problem 4. (20 Pts) A $400,000 investment in a Surface Mount Machine produces before-tax net revenue...
Problem 4. (20 Pts) A $400,000
investment in a Surface Mount Machine produces before-tax net
revenue of $100,000/yr for 10 years, at which time the SMP machine
will have a salvage value of $15,000. We assume $250,000 is
borrowed at 12% annual compound interest and repaid in 10 years. We
will use a 10 year planning horizon, a 40% tax rate, at 10% BTMARR,
and SLN depreciation. Determine (i) ATMARR, and then the preferred
payment plan based on ATPW and...
Cyanide is used in several industrial applications, such as mining gold and electroplating silver. A danger...
Cyanide is used in several industrial applications, such as
mining gold and electroplating silver. A danger of working with
cyanide solutions is the potential hazard of releasing highly toxic
hydrogen cyanide gas. What conditions are necessary to ensure that
less than 1% of the cyanide in a particular solution is chemically
present as HCN rather than CN-? (HCN pKa= 9.2)
(A) pH > 11.2
(B) pH > 10.2
(C) pH > 9.2
(D) pH > 8.2
(E) pH > 7.2...
5. Surface energy (2 pts). Let’s use the concept of surface tension as surface energy per...
5. Surface energy (2 pts). Let’s use the concept of surface
tension as surface energy per unit area to see if we can estimate,
at least to the correct order of magnitude, the surface tension of
water.
a) Water has a molar mass of 18 g/mol and a density of 1000
kg/m3 (or 1 g/cm3). Based on this data, estimate the number of
water molecules per unit surface area of water.
b) The coordination number of water (i.e., the average...
(20 pts) Inquiries arrive at an information center according to a Poisson process of rate 2...
(20 pts) Inquiries arrive at an information center according to
a Poisson process of rate 2 inquiries per second. It takes a server
an exponential amount of time with mean ½ second to answer each
query.
(a) (5 pts) If there are two servers. What is the probability
that an arriving customer must wait to be served?
(b) (5 pts) Find the mean number of customers in the system and
the mean time spent in the system.
(c) (10 pts)...
A 13.0 kg block is dragged over a rough, horizontal surface by a 88.0 N force...
A 13.0 kg block is dragged over a rough, horizontal surface by a
88.0 N force acting at 20.0° above the horizontal. The block is
displaced 4.50 m, and the coefficient of kinetic friction is
0.300.
(a) Find the work done on the block by the 88.0 N force.
(d) What is increase in internal energy of the block-surface
system due to friction?
(e) Find the total change in the block's kinetic energy.
6 Problem 2 (20 pts) The SPAD XIII was a fighter plane used by various countries,...
6 Problem 2 (20 pts) The SPAD XIII was a fighter plane used by
various countries, including the United States, during World War I.
It had a 97 kg wooden propeller that was 2.5 m long and 15 cm wide
and 9 cm thick. A Vickers 7.7 mm machine gun mounted on the front,
which used a timing belt to fire between the propeller blades at a
rate of 500 rounds/minute. The gun is mounted halfway between the
engine shaft...
5. [20 pts.] Historical data is often used in marketing to drive estimates of future demand....
5. [20 pts.] Historical data is often used in marketing to drive
estimates of future demand. A common estimate (or forecast) used to
predict future demand is the moving average. This forecasting
method considers a weighted average where the m most recent
observations receive the same weight, while all the remaining
observations receive a weight of zero. Of course, the value of m is
a parameter of the method, and it is up to the user to fine tune it...
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