You are to design a 24-V, all-DC, stand-alone PV system to meet a 2.4 kWh/d demand for a small, isolated cabin. You want to size the PV array to meet the load in a month with average insolation equal to 5.0 kWh/m 2/d
In: Electrical Engineering
Working from first principles, derive an expression for the efficiency of an Otto Cycle engine in terms of compression ratio. Sketch the P-V diagram for this cycle and annotate it using the same station numbers used in your derivation. State why the efficiency must be less than that of the Carnot Cycle.
In: Mechanical Engineering
Calculate the gas constant R.
MassMg = 0.053g
V = 45.8 mL
T = 297 K
Pressuretotal = 757 mmHg
molar mass Mg = 24.31 g/mol
molar mass H2 = 1.01 g/mol
Mg(s)+ 2HCl(g) ---> MgCl2(aq) + H2
In: Chemistry
A squared cross- sectional bar of 3cm by 3cm is under a compressive stress of 300 MPa. The bar deforms elastically, what is the area of the cross section after deformation. Provide your answer in milimeters squared. (Do not type in the unit in your answer.) (E=30GPa, v=0.4)
In: Mechanical Engineering
A current carrying gold wire has diameter of 0.84 mm. the electric field in the wire is 0.49 V/m. What is
a The current carried by the wire?
b The potential difference between two points in the wire 6.4 m apart?
c The resistance of a 6.4 m length of this wire.
In: Physics
In: Biology
For a 3D free electron gas, derive expressions for the Fermi momentum, Fermi energy, and density of levels. Then plot the density of levels and contrast its behavior as a function of energy. Your answers should be expressed in terms of the electron concentration n = N / V and some combination of fundamental constants.
In: Physics
After you have reviewed the web link below:
Think of an adult learning situation that was very successful. How does neuroscience help explain why it was successful?
https://www.shiftelearning.com/blog/effective-adult-learning-neuroscience
https://www.youtube.com/watch?v=-L1IzhIWM58&feature=youtu.be
In: Nursing
The velocity components of an incompressible, two-dimensional velocity field are given by the equations u=y^2-x(1+x) v=y(2x+1) (a)Show that the flow satisfies continuity. (b) Determine the corresponding stream function for this flow field. (c) Determine if the flow is irrotational.
In: Physics
An arrow is shot straight up from a horizontal level with an initial velocity of 45j m/s.
A. Find its flight time.
B. Find its position at t=6.0s
C. What is its velocity at t=6.0s
D. Graph v(t) vs. t.
In: Physics