Right now you live in a house that is pretty old and doesn’t have double- paned windows. Your heating bill in the winter and spring will be really big, and you think it might be due to the huge single-paned window in the living room. Your landlord has told you that he is willing to replace it with a double paned window but you have to cover the cost of the window. You want to do a quick calculation to see if you can recover the cost of the new window before you graduate (and hopefully move out). If electricity used for heating costs 6.90 cents per kWh, will you save enough money? Assume 120 days of winter, followed by 90 days of spring until your graduation.

The living room is 3.5 m by 4.2 m, and is 2.4 m tall. The exterior wall has the standard 20 cm of fiberglass insulation. The existing window is on the narrower wall at one end of the living room and is 130 cm wide, 75 cm tall, and 4 mm thick. The new window is a state-of-the-art double paned window, with two panels of 4 mm glass separated by a 2 mm air-filled gap. Use the following values of thermal conductivity:
kfiberglass=0.04 W m−1 K−1, kglass=0.96 W m−1 K−1, kair=0.024 W m−1 K−1.

And also assume the following values for the average temperature:

Thouse=20∘C inside the house (to be maintained)

Twinter=3∘C outside the house during winter

Tspring=8∘C outside the house during spring

Finally, you estimate that the house is heated for 12 hours per day on average.

1.Calculate the heat conduction rate of the single-paned window during spring and winter.

2. With multiple layers of material with separate thickness and thermal conductivity values, the heat conduction rate must be calculated using the total resistance R.

Using the description of the double pane window, calculate its total resistance R. Give your answer in W−1 m2 K, to four decimal places.

3. Calculate the heat conduction rate of the double pane window during spring and winter.

4.calculate the total energy saved during spring and winter by switching to the double pane window in kwh

5. Using the answers above, calculate the total savings in the heating bill. Assume that the efficiency of converting electrical energy to heat is 100%. Give your answer in dollars.

A Four bar mechanism with a frame length of 200 mm, crank length of 100 mm, coupler length of 300 mm and follower length of 250 mm, if the mechanism is assembled in open cpen configuration and the input angle is 45^{o .}

what is:

1-The coupler angle for open and crossed  configuration ?

2-The output angle for open and crossed configuration ?

A thermocouple (TC) reads a temperature of 180 degrees C when placed in a large wind tunnel. The thermocouple is exposed to convection and radiation heat transfer.

• The convection heat transfer coefficient h = 125 W/m²-K.
• As for radiation, the surface of the thermocouple is diffuse and gray with an emissivity of 0.6. The walls of the wind tunnel are at a uniform temperature of 450 degrees C.

Questions:

1. Provide a sketch
2. State your assumptions
3. Calculate the temperature of the air in the wind tunnel
4. The walls of the duct have an emissivity of 0.85. Explain in one or two sentences why the emissivity of the walls should (or should not) have an effect on your answer?

In Multi-Effects Desalination (MED) system composed of 4 effects, and 3 feed
preheaters and down condenser. List the following:
a- The mass balance in the evaporator, feed preheater and down condenser
b- The energy balance in the evaporator, feed preheater and down condenser
c- The Material balance in the first effect
d- The temperature profile of the feed if the intake temperature is 25ºC and
temperature of last effect is 40ºC and the temperature of first effect is 60ºC
e- What will happen to the transfer area of the evaporator if the motive steam
temperature is increased to 100ºC where the rest is remaining constants.

Which of the following polymers may be produced by condensation polymerization? Choose which apply.

1) Phenol-formaldehyde

2) Poly (vinyl chloride)

3) Polycarbonate

4) Nylon

5) Polystyrene

6) Polyethylene

(a) Apply Maxwell relation and Gibb’s first equation (du=TdS-Pdv) to find the (∂u/∂P)_Trelation in terms of directly measurable properties (P, V and T). For an ideal gas, what will be the value of that partial derivative?

(b) Illustrate physical meaning of Inversion line with the help of T-P diagram.

(C) Assume that carbon dioxide (CO2) is collected from bacterial decomposition of organic matter at 5℃, and atmospheric pressure (100 kPa), and is required to be used in a process at -30℃, 40 bar. Apply theory of real gas behavior to calculate how much actual minimum work input and heat transfer is required to reach this state. Also, suggest some devices that can be used to obtain this state change

31. Write a report on advancement in wheel and tyre technology.Also the report should be consest of 10-12 Page,Advantage disadvantage,Future scope.Plagarsim level should be Zero.

Please don't answer if you don't know and write the report on 10-12 page minimum.
For small answer or for plagrism I will downrate your answer.So if you know than only answer it

Consider that a 1.35 wt% C- 98.65 wt% Fe alloy. Determine the weight fraction of the following.

(a) Proeutectoid Ferrite:
(b) Proeutectoid Cementite:

(c) Pearlite:
(d) Ferrite in Pearlite:

An airplane with a total span length of b = 60 m and cord length of c = 6 m wants to land at the airport. Holiday Rentals wing profile is NACA 23012 and single slot flaps are open while landing (α = 12 °, CL, flapli = 3, CD∞ = 0.07). Airplane Find the weight (kN) of the aircraft if it lands at 1200 kW thrust (ρ air = 1.2 kg / m3 ).

what are the thermal properties of composite materials??? with references, please.

Develop a simple MIS (Management Information System) that consists of a simple database (a text file). The system manages to dynamically input record/data into the database. The data from the database can be sorted, searched and updated. User also should be able to add new records/data, remove any data and etc.
Here are some ideas of MIS that can be developed:
1. Hotel reservation system.
2. Students management system.
3. Payroll management system.
4. Bus/Railway/Plane ticketing system.
5. Clinic record management system.

A solid propellant rocket engine gases at 3000 K stagnation temperature and 6000 kPa stagnation pressure It manufactures. The exit and throat areas of the nozzle are 0,01 m2 respectively. and 0.005 m2 Adiabatic base of the produced gases 1,4 and the gas constant is 320 J / kg.K. Find the thrust produced by the rocket at a height of 25 000 m (kN).

Give a step by step process of veryfying that a component under a set of loads will not fail.
Soild Mechanics course question

Determine the mass flow rate of the refrigerant flowing through the condensor of a two-stage compression refrigeration cycle (in kg/s). The fraction of the refrigerant that evaporates as it is throttled to the flash chamber is 0.19. The enthalpy of the refrigerant entering the evaporator is 55.14 kJ/kg and the enthalpy of the refrigerant leaving the evaporator is 239.19 kJ/kg. The amount of heat removed from the refrigerated space is 28 kW. (Round your answer to three decimal places).

1. Residual stress refers to stresses induced by plastic strain. T or F
2. Failure criteria is identical for ductile and brittle materials. T or F
3. Statically indeterminate problems can be solved by using additional equations provided by Hooke's Law. T or F.
4. To analyze stress at any point of any component or structure , one should consider:
5. The stress developed in a cylindrical pressure vessel along the longitudinal axis is: