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A beverage can with a diameter of 65 mm and a height of 120 mm has a uniform temperature of 5°C when it is removed from the refrigerator. The can is set on a table in a room with an ambient air temperature of 32°C and a relative humidity of 75%. Estimate the condensation rate assuming
(a) Drop wise condensation and
(b) Film condensation. Compare the rates and explain under what conditions drop wise condensation can occur.
Derive the expression of the output resistance for circuits in Figure 1. Assume the BJT transistor is biased at forward-active region, and you can directly use the small signal parameters of the transistor, such as gm, β, rπ.
Question 3 Consider a silicon pn junction diode at room temperature with: EG = 1.1 eV VBI = 950 meV
Assume that a load Z absorbs power of 150W at a lagging power factor of 0.8, and the voltage across the load Z is 220Vrms, 50 Hz. What must be the value of capacitor that needs to be connected in parallel with the load Z
If the signal is connected to the input of an inverting op-amp circuit, what voltage gain is necessary so that the output of the amplifier produces a change of 2 V for every degree change in temperature
A truncated cone has a height of 50cm. The circular faces on the top and bottom have radii of 20 mm and 1mm, respectively. If the material from which the solid cone is constructed has a conductivity sigma of 2 x 10^6 S/m.
The input resistance of the recorder is unknown andlikely to be variable, but it is greater than 10kΩ. Adeflection of 1 cm per milliampere of cell current with anaccuracy of about ±3 percent is desired. What type of ideal amplifier is best suited ..
A home entertainment center has four different audio sources that can be played over the same set of speakers. Each audio source, named A,B,C,D, is connected using 8 wires on which the digitizedaudio signal is transmitted.
The maximum ratings for all resistors of this type are 250 (V) and ½ (W). What range of resistance values are limited by the maximum voltage rating of 250 (V), and what range of resistance values are limited by the maximum power of ½ (W)
A system is described by the differential equation ty'(t)-8y(t)=x(t). Classify the system as to linearity, time-invariance and stability. Show that a system with exicitation x(t) and response y(t) described by y(t)=u(x(t)) is nonlinear, time invari..
Write a program to record the temperature and pressure values in a scientific experiment and store the data in (2) one dimensional array, and then identify the extreme values of pressure and temperature. The array size is 20.
An engineering firm consisting of 3 programmers and 6 circuit engineers. The employees are randomly assign to 3 teams of 3, labeled Group 1, Group 2, and Group 3. a) How many ways are there to assign the 9 employees to Groups 1, 2 & 3
Design a circuit that lets exactly one full negative pulse (from an input train of pulses) pass through to the output, after a button is pushed.
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