Engineering, 07.04.2020 15:53 zanaplen27
PSSC is a brokerage firm that buys and sells stocks for its clients. Thus, the main actors are broker and clients. PSSC has offices in different cities and each broker works in only one of these offices. A broker can also be an office manager (For the office he/she works in).Clients own accounts, and any account can have more than one owner like joint account. Each account is also managed by at most one broker. A client can have several accounts and a broker can manage several accounts, but a client cannot have more than one account in one office. Given these conditions, design an ER diagram for this application using CHEN’s notation, no other notation is acceptable and will not be graded. Write any unspecified requirements and any assumptions that you need to make the specification complete. In your ER diagram;
a. Identify each entity type and relationship type.
b. Identify attributes and key attributes for each entity type and/or relationship type.
c. Identify all of the structural constraints.
Answers: 1
Engineering, 03.07.2019 14:10, volleyballfun24
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
Answers: 3
Engineering, 04.07.2019 18:10, niyawilliams23
Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10
Answers: 1
Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
PSSC is a brokerage firm that buys and sells stocks for its clients. Thus, the main actors are broke...
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