A laminate [60/45/0/45] is prepared using AS/3501 graphite-epoxy lamina. The material properties for the AS/3501 graphite epoxy lamina are: E- 140 GPa E2 23-10 GPa V12=V13 = 0.3 V23 0.3 G12= G13 = 7 GPa Xy = 400MPa Xc--300MPa Yr 400 MPa ??-:-300 MPa S=70MPa

a) Assuming each lamina thickness is 1 mm, calculate A, BI and DI for the laminate.
b) A beam AB of 100 mm length and 20 mm width is fabricated using the above AS/3501 graphite- epoxy [60/45/0/45] laminate. The beam AB is subjected to only a pure bending moment M. Using the maximum stress theory; predict the maximum allowable value of the M. (20 points) c) For the beam AB, predict the maximum allowable value of M using Tsai-Wu Hill. (Assume that Xe mìn (IIXyll. Il ell) and Y= min (11 1,11 Yell))

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.