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A sphere with a diameter of 80 cm is initially at a temperature of 250°C. If the intensity of the radiation detected at a distance of 2.0 m from the sphere’s center is 102 W/m
2
, what is the emissivity of the sphere?
A tungsten filament in a lamp is heated to a temperature of 2600 K by an electric current. The tungsten has an emissivity of 0.32. What is the surface area of the filament if the lamp delivers 40.0 W of power?

Dvc RC Dt + Vc = 0 (11-12) This Can Be Solved For Vc Using Basic Calculus. The Result Is Vc = Voet/RC (11-13)
I need all the steps of how to get Vc, from 11-12 to 11-13

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I Know That Vc = Ic * Xc ; Xc = 1/2pifc… Beyond That How Does One Find Ic? Please Help With Work Shown
I know that Vc = Ic * Xc ; Xc = 1/2pifc…
Beyond that how does one find Ic? Please help with work shown

7.65 A CS Amplifier Utilizes A MOSFET With U„Cox 400 U A/V And WIL= 10. It Is Biased At 1, = 320 U A And Uses R, = 10 K32. Find Rin, Ayo, And R. Also, If A Load Resistance Of 10 K12 Is Connected To The Output, What Overall Voltage Gain G, Is Realized? Now, If A 0.2-V Peak Sine-Wave Signal Is Required At The Output, What Must The Peak Amplitude Of Be? V Sig

Calculate the overall voltage gain Gv of a common-source amplifier for which gm = 3mA/V, ro = 100k, RD =10k, and RG =10M. The amplifier is fed from a signal source with a Th´even in resistance of 1M,and the amplifier output is coupled to a load resistance of 20k.

Enthalpy and entropy data for saturated steam between 100 and 300°C are shown in Table 5.5. Prepare a chart of the enthalpy data as a function of temperature, and add a trendline to the chart that fits the data well. Report the equation of the trendline and the value