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An electric heater with a capacity P is used to heat air in a spherical chamber. The inside radius is outside radius and the conductivity is k. At the inside surface heat is exchanged by convection. The inside heat transfer coefficient is T∞. Heat loss from the outside surface is by radiation. The surroundings temperature is and the surface emissivity is Tsur H. Assuming one-dimensional steady state conduction, use a simplified radiation model to determine:
[a] The temperature distribution in the spherical wall.
[b] The inside air temperatures for the following conditions:
The lifetime of a turtle is a continuous value uniformly distributed between 50 and 150 years. Let X and Y be the lifetimes of two randomly chosen turtles, and consider the following events: A = {X
A standard 12-V car battery has an ampere-hour rating of 40 Ah, whereas a heavy-duty battery has a rating of 60 Ah.- How would you compare the energy levels of each and the available current for starting purposes?
if x = 0, the counter counts 1,2,3,4,5,6,7 and repeats. if x = 1, the counter counts 7,6,5,4,3,2,1 and repeats. The counter should be designed using D Flip FLips and the one hot method. Draw the asm chart and final logic diagram.
air expands through a nozzle at a rate of 1kg/sec. the outlet is at 15kpa and the inlet is at 400kpa,150degree and 35m/sec. assuming the process to be reversible and adiabatic, what is the exit velocity.
A solar cell is uniformly illuminated by monochromatic light of 700nm with power density of 20 mW/cm^2. What is the corresponding incident photon flux What is the upper limit to Jsc if the bandgap is 1.4eV
Indctance = 300nH/m, Capacitance = 53pF/m, Frequency = 0.02HzA coax cable... start with the general form of thecharateristic impedance state any approximations and find the expression for the charateristic impedance.
Construct a horizontal line on your I versus V graph at the point I = 1 mA. This line will intersect each of the sloping lines at two separate points. Explain the significance of each of these intersections
A 60-Hz, 220-V-rms source supplies power to a load consisting of a resistance in series with a capacitance. The real power is 2000W, and the apparent power is 2500VA. Determine the value of the resistance and the value of the capacitance.
A string of Christmas tree lights of eight (6W, 15V) bulbs connected in series. a) What current flows when the string is plugged into a 120V outlet b) What is the resistance of each bulb
what are the application of backward diode
What are goods or services are sold by the producer directly to the final user; no intermediaries are involved?
Derive the form of the filter that maximizes the SNR at the output of the filter at time t =tO To make this problem simpler, you do not need to insist that the filter is causal.
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