Air at 5 bar and 560K is expanded in steady flow in a horizontal convergent–divergent duct to an exit velocity
of 640 ms−1. The walls of the duct are heated so as to keep the temperature drop to one-half the value of an
isentropic expansion to the same velocity and pressure from the same initial conditions. Calculate, assuming
negligible initial velocity:
a. the heat supplied;
b. the final temperature;
c. the mass flow rate per square metre of exit area.

Which type of motor is hydraulically balanced so as not to have buckling forces on the drive shaft.
(A) Gear
(B) Palettes
(C) Pistons

And Why?

The pressure compensator in which type of hydraulic piston motor is used.
(A) Axial
(B) Inclined axis
(C) Alternative

And Why?

The pressure plate is used in the manufacture of the motor of:
(A) Gear
(B) Palettes
(C) Pistons

And Why?

Thank you for your time, have a nice day :)

Which type of motor is hydraulically balanced so as not to have buckling forces on the drive shaft.
(A) Gear
(B) Palettes
(C) Pistons

And Why?

The pressure compensator in which type of hydraulic piston motor is used.
(A) Axial
(B) Inclined axis
(C) Alternative

And Why?

The pressure plate is used in the manufacture of the motor of:
(A) Gear
(B) Palettes
(C) Pistons

And Why?

Thank you for your time, have a nice day :)

The composite walls of a building are made up of three materials. The inside layer of the walls is 1-cm thick wall board (kwb = 0.2 W/mK). The middle layer is 10 cm thick insulation (kI = 0.06 W/mK) and the outside layer is 3 cm of wood (kw = 0.15 W/mK). The total wall area is 350 m2. The outside air temperature is -10 oC and the inside air temperature is maintained at 20 oC. The inside and outside average convective heat transfer coefficients are 7 and 35 W/m2K, respectively. You are asked to: a. Sketch and label the thermal circuit diagram for the rate of heat transfer, q, from the inside of the room, through the composite walls and to the outside. Evaluate all individual thermal resistances, the total thermal resistance and the overall heat transfer coefficient. [10] b. Evaluate q. [2] c. Determine the unknown temperatures on both sides of the insulation layer. [3] Hint: Neglect radiation, contact resistance and conduction in air. The walls are large enough so that 1-dimensional conditions exist.

There are proposals to store energy in flywheels for load leveling in utility systems.
During the off-peak period for energy demand at night, these flywheels are charged
to high speeds. At peak periods during the day, this energy is supplied back to the
utility.
How would ASDs play a role in this scheme? And what is the role of electric drives in electric transportation systems of various types?

Draw a diagram of a typical BDP flame above an AP/HTPB composite propellant. Label each flame, and include the position of the AP and HTPB in the condensed phase.

For the given set of strand burner data (given also as a .txt for easy excel import):

Calculate the parameters, a and n, of St. Robert’s Law for each T0. Plot the results in log-log space.

Calculate the temperature sensitivity of the propellant, σ_p at P=0.5 MPa, P=5 MPa, and P=10 MPa.

A 35-kg box of beef at 6 C having a water content of 60% is to be frozen to a temperature of -20 C in 3 h. Determine:

a) the total amount of heat that must be removed from the beef

b) the average rate of heat removal from the beef

When a fuze ( note this spelling) of some sort is ignited it will burn or deflegrate ( be sure you know the difference) In some cases when then the chemical composition of the fuze material is a propellant or even an explosive of some type the fuze will transition to a detonation within that material. The question is what attributes of the the material - Chemical and Geometric - will govern if or how or how quickly the material detonate?

An Internet service provider has three different subscription packages for its customers:

Package A: $9.95 per month 10 hours of access are provided.   Additional hours are $2.00 per hour.

Package B: $14.95 per month 20 hours of access are provided. Additional hours are $1.00 per hour.

Package C: $19.95 per month unlimited access is provided.

Write a MATLAB script to calculates a customer’s monthly bill. It should ask which package the customer has purchased and how many hours were used. It should then display a message with the hours and the total amount due, correct to two decimal places.

Also displays how much money Package A customers would save if they purchased packages B or C, and how much money Package B customers would save if they purchased Package C. If there would be no savings, no message should be printed.

Input Validation: Be sure the user only selects package A, B, or C. Also, the number of hours used in a month cannot exceed 744. Display an error message and exit the program if user enters incorrect information.

I need it answered in MATLAB syntex

Find the design cooling and heating loads of UC 1017. Consider UC 1017 is a detached room. You are free to assume any values reasonably for the calculation. Consult different charts, tables and climate data as necessary. Assuming 50% fresh air and 50% of recirculated air passing through the evaporator coil and the by-pass factor of 0.2, find the dew point temperature of the coil and the capacity of the coil.

I need you to provide the Table and the calculation for everything.

the room size = Hight 6.6 m , width 18m, length 14.5m

I'll attach an example for a student work from last year that I'd like you to follow.

Address the following questions related to heat exchanger effectiveness. Recall that the maximum heat transfer possible is the product of the minimum heat capacity (mass flow rate times specific heat) times the difference between the hot and cold side inlet temperatures. a. sketch the temperature profiles for a 50% and 80% effectiveness heat exchanger. make sure you have the correct shape which includes the degree of steepness at each end. b. What is the effectiveness for a heat exchanger with the following characteristics: the hot side is water entering at 160F and 21Ib/s, and the cold side is air entering at 20F and 4Ib/s. the heat exchanger has been designed to achieve an air outlet of 110F.

11.4 What are the basic requirements that a trainee must satisfy in order to get the most out of training?

11.2    What are the advantages that a trainee receives from training?