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Which of the following is an example of the type of force that acts at a distance?

Two ropes are attached to a 40-kg object. The first rope applies a force of 25 N and the second, 40 N. If the two ropes are perpendicular to each other, what is the resultant acceleration of the object?

THIS CONTENT IS PROTECTED AND MAY NOT BE SHARED, UPLOADED, SOLD, OR DISTRIBUTED High Electron Mobility Transistors (HEMT) rely on the use of a barrier semiconductor to prevent leakage current between an electrode and the “channel” which is the semiconductor where electron transport occurs. This leakage current is due to tunneling, which is a fundamental property of subatomic particles and cannot be neglected. Here, estimate the tunneling probability of an electron with an effective mass of 0.2 m0, where m0 = 9.11*10-31 kg is the mass of an electron, and kinetic energy of 0.1 eV in the presence of a rectangular potential barrier of height V0  = 0.3 eV and width 150 Å.  SELECT CORRECT FROM AVAILABLE ANSWERS

THIS CONTENT IS PROTECTED AND MAY NOT BE SHARED, UPLOADED, SOLD, OR DISTRIBUTED If [a] x 1017 cm-3 silicon atoms are added to GaAs as a substitutional impurity and are distributed uniformly throughout the semiconductor, determine the distance between silicon atoms in terms of the GaAs lattice constant. (Assume the silicon atoms are distributed in a rectangular or cubic array.) The lattice constant of GaAs is 5.65 Å. INSERT YOUR ANSWER with 1 decimal place in the box below

THIS CONTENT IS PROTECTED AND MAY NOT BE SHARED, UPLOADED, SOLD, OR DISTRIBUTED For an X-ray machine radiation is needed with a typical wavelength of [l] Å. By colliding an electron beam with a heavy metal (i.e. heavy atoms) target, the wavelength of the EM radiation generated is in the Angstrom or nanoscale regime instead of micrometers as it is for visible light. The electron beam is accelerated in a vacuum tube and all its energy is converted into radiation, i.e. photons. Assume initial velocity  and energy of the electrons are negligible. What is the wavelength in Å of the accelerated electron just before it hits the target? Let m0 be the free electron mass of 9.11*10-31 kg, the electron charge q = 1.6*10-19 C; Planck’s constant h = 6.625 x 10-34 J-s;   

_____ was a Greek version of the Hebrew Bible, commonly abbreviated as LXX; this would have been the “Bible” used by Jesus and the disciples. (2 points, extra credit)

The writer of Revelation is the only NT writer to claim divine inspiration for his work.

In Galatians 5:22-23, Paul lists nine qualities that are evidence of the Holy Spirit at work in a person’s life: love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, and self-control. Paul refers to these qualities as:    

THIS CONTENT IS PROTECTED AND MAY NOT BE SHARED, UPLOADED, SOLD, OR DISTRIBUTED A power semiconductor device consists of a region doped with Boron atoms such that the concentration of holes is p0 = 1.5 x 1017 cm-3. The device dissipates power which generates heat, thus heating the silicon crystal to a temperature of T = 400 K. Use: m*n = 1.08 m0, m*p = 0.56 m0, Egap = 1.12 eV = Ec with Ev = 0 as the reference, and m0 is the free electron mass = 9.11 x 10-31 kg. Assume Boltzmann statistics applies and answer the next questions: a) Find the intrinsic Fermi level EFi  [Fermi] in eV  b) Find the intrinsic carrier concentration [ni] ni = pi  c) Find EF – Ev [EFV]  in eV   d) Find Ec – EF [ECF] in eV    e) Calculate the respective minority carrier concentrations [minority] SELECT CORRECT FROM AVAILABLE ANSWERS

John’s Gospel is (admittedly) selective: in John 20:30-32, the writer states that Jesus’ miracles and teachings were so numerous that they would fill all the books of the earth if all were written down. For his Gospel, John tells of ____ miracles of Jesus, which John calls signs because they reveal Jesus’ divine nature and power.