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You are working with an artist who has been commissioned to make a sculpture for a big city in the eastern United States. The artist is wondering what material to use to make her sculpture because she has heard that acid rain in the eastern United States might destroy it over time. You take samples of granite, marble, bronze, and other materials, and place them outdoors for a long time in the big city. You periodically examine the appearance and measure the mass of the samples.
(a) What observations would lead you to conclude that one or more of the materials are well-suited for the sculpture?
(b) What chemical process (or processes) is (are) the most likely responsible for any observed changes in the materials?
Compare the contributions of segments 2 and 4 to the magnetic field at point P (both magnitude and direction).
Consider LTI system described by input-out relationship below y(t)=u(t) times integral(from minus infinity to t) (x(tau)) d(tau) a) Determine impulse response ,h(t), of the system without using Fourier and Laplace transform tools.
A sin wave that is full wave rectified, has the following properties: Vmax=13 Period=1mS Calculate Vrms.
Suppose you want to use external components to configure a comparator in order to provide hysteresis for the input. Show how you would configure such a comparator with hysteresis input.
Toroidal coil of square cross section with N turns carrying current I. The inner radius is a, the outer radius is b. Height of the toroid is h. Solve for magnetic field density and magnetic flux everywhere in space. Find vector potential, A, of th..
how many different values may any base 9 digit have What is the highest value allowedf for any base 9 digit
A symmetrical toroidal coil is wound on a plastic core (μr ≅ 1) and is found to have an inductance of 1 mH. What inductance will result if the core material is changed to a ferrite having μr = 200? Assume that the entire magnetic path is composed ..
In a motor control system, one master stop pushbutton (Stop) is available for stopping the operation at any time. If the temperature switch (TSW) is closed, pressing the red pushbutton (RedPB) will turn on both motors M1 and M2.
Assume a thermocouple generates a linear voltage from 20 mV to 50 mV when the temperature changes from 750 degrees F to 1250 degrees F. How much voltage will be generated when the temperature of the thermocouple is at 1000 degrees F
Calculate the extraction efficiency (in percentage) of flat - surface LED without any encapsulation (emits directly into the air). The LED is fabricated from material with the refractive index n = 2.3.
A 50 ohm transmission line is terminated to the load (60-40j) ohm. How far from the load, a short ckt stub of a fix length of λ/8 needs to be placed so the minimum voltage standing wave ratio (VSWR) between generator and stub achieved. Find the VS..
Consider clear sky conditions for which the direct radiation is incident at ? = 30°, with a total flux (based on an area that is normal to the rays) of q''dir = 1000 W/m2, and the total intensity of the diffuse radiation is 1 dif = 70 W/m2 · sr. W..
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