1) In regards to the cross-sections of straight members, what two axes coincide?

2) Give the two equations known as the curved-beam formula. Define each variable.

3) As discussed in class, what is the theory of failure for ductile materials?

4) As discussed in class, what is the theory of failure for brittle materials?

5) What is the most common mechanism of yielding of a ductile material, such as steel?

6) The yield stress for a zirconium-magnesium alloy is ?Y = 15.3 ksi. If a machine part is made of this material and a critical point in the material is subjected to in-plane principal stresses ?1 and ?2 = -0.5?1, determine the magnitude of ?1 that will cause yielding according to the maximum shear stress theory.

Identify the kind of chips – continuous, discontinuous, segmented or built-up edge, that the following workpieces will tend to form under typical cutting (turning) conditions (i.e. not severely high cutting speeds, depths of cut or feeds). Also, state the reason for why that would be the case.

a) Grey Cast Iron

b) Titanium

c) 4140 Alloy steel

d) stainless steel 316

Moist air at 30 °C and 50% relative humidity enters a dehumidifier operating at steady state with a mass flow rate of 319.35 kg/min. The moist air passes over a cooling coil and water vapor condenses. Condensate (condensed water) exits at 10 °C. Saturated moist air exits in a separate stream at the same temperature. The pressure remains constant at 1 bar. Determine (a) the rate at which water is condensed, in kg/min, and (b) the heat transfer rate during the cooling, in kW

Saturated liquid Propane flows in to a valve. It enters at 375 psia, and leaves at 15 psia. Mass flow through the valve is 1.25 lbm/hr. Use EES and ‘Propane’ as your fluid.  This new device replaces the valve with a ‘magic’ isentropic device. Assuming the device operates at steady state, and PE and KE terms are insignificant, calculate how much power could be generated by the device (hp)?

In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C
a) For a pressure of 7 bar right after the first stage turbine in the ideal Rankine cycle, create
two plots: thermal efficiency as a function of the reheat temperature from 200 °C to
500 °C; and the net work, heat addition, and heat extraction on the same graph as a
function of the reheat temperature from 200 °C to 500 °C  

In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C.
Calculate the total heat addition, net work of the cycle, heat extraction through condenser,
and thermal efficiency of this ideal Rankine cycle with reheat  

When a can of beer is both full and empty, the center of mass is in the center of the can. As you drink your beer, however, the center of mass lowers to some minimum point, before returning back to the center. What is that minimum point?   

1- what are radiation protection standards based on (where does the data come from)?

2- What are some of the typical symptoms/injuries from radiation exposure? (ie fatigue, nausea, blood changes are syptoms of radiation sickness whereas, cataracts, cancers, birth defects, etc. are some possible “injuries” from exposure)

3-What type(s) of effects are the radiation protection standards trying to prevent?

4- In general, how do limits for the general public compare to those for occupational exposure?

1- what are radiation protection standards based on (where does the data come from)?

2- What are some of the typical symptoms/injuries from radiation exposure?

(ie fatigue, nausea, blood changes are syptoms of radiation sickness whereas, cataracts, cancers, birth defects, etc. are some possible “injuries” from exposure)

3-What type(s) of effects are the radiation protection standards trying to prevent?

4- In general, how do limits for the general public compare to those for occupational exposure?

pleas type the answe i can not read hand writing

Introduction to Engineering Materials Question:

A beam of light hits a 2.48cm thick silicate glass plate at an angle of 74 degrees (as measured from the normal to the surface of the glass). If the coefficient of linear absorption is 0.027 cm-1 and the index of refraction is 1.488, what fraction of light is passed through the plate. The answer should have three decimals of accuracy.

The figure 2 represents the tower crane used in material handling. Figure 2: Tower Crane

c) How the load is balanced in the mechanism?

d) Explain the working principle of mechanism based on kinematics background

e) Explain the possibility of inversions on the identified mechanism.

8.20 A long composite cylinder is subjected to the external pressure loading as shown in the following figure. A assuming idealized perfect bonding between the two materials, the normal stress and displacement will be continuous across the interface r=r1 (see section 5.2) Under these conditions, determine the stress and displacement fields in each material. Text: Elasticity Third Edition - Martin H. Sadd    There is not figure, EXAMPLE 1.5 is on page 25 from this text.

A noise source produces sound mainly at 2500 Hz and an SPL of 95 dB at the location of a worker. In order to decrease this worker’s noise exposure, the employer decides to build a brick wall (? = 400 kg/m2) between source and worker. What would the sound level at the worker’s location be after the wall is built. Assume that the wall is perfect and that the sound must go through it (not around it).

A Carnot heat engine operates between two thermal reservoirs ( T1 > T2 ) to generate as much power as required as to drive a machine ( input power requirement of 30 kW ) plus to drive an ideal heat pump working between 2 temperature limits ( T3 and T4 ) ( T3 > T4 ) . The pump takes 17 kW of heat from the low temperature reservoir where T1 = 1200K, T2= T3 =335 K, T4 = 278 K. Determine :
1. shaft work output of heat engine.
2. heat intake of heat engine.
2. heat delivered by the heat pump.

please explain in an easy to understand way as my end sem is tomorrow morning. ??