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where R is the resistance at temperature T(measured in C), R0 is the resistance at T = 0 C and α is a temperature coefficient. For copper, α = 4 * 10-3 C-1 . At what temperature is the
Write a switch statement to print out "Odd" or "Even" for each integer that is typed on the keyboard depending on whether the integer is odd or even. Only integers from 0 to 9 can be typed on the ke
When room temperature exceeds approximately 82 degrees Fahrenheit, turn on a red LED. Use a PNP transistor to turn on one LED and an NPN transistor to turn on the other LED. Wire the LED's as parrel
The four alkaline battery cells store a total of 200watt-seconds of energy. If the cassette player is drawing a constant 10mA from the battery pack, how long will the cassette operate at normal powe
Measurments taken of a square-wave signal using a frequency-selective voltmeter(called a spectrum analyzer) show its spectrum to contain adjacent components(spectral lines) at 98KHz and 126 KHz of a
The following calculation was performed by a particular breed of exceptionally intelligent cartoon character. If the radix r used by the character corresponds to its total number of toes, how many t
What is the probability that this string is a mirror image of itself and compute the probability that all of the balls in the sample are the same color
In most situations it is also desirable to send information from the process to be controlled--in this case the 500-gallon tank--to a central station for processind and storage. this information can
Assume that one of the pumps uses a1/4hp DC shunt motor with an input voltage of 115VDC that pulls 1.6A running at 1500 rpm. The filed resistance for the motor is 600 ohms and the armature resistanc
A wooden cylinder 30.0 cm highs gloats vertically in a tube of water (density = 1.00 g/cm cube). The top of the cylinder is 14.1 cm above the surface of the liquid. What is the density of the wood
The acceleration of a particle is defined by the relation a = -k/x . It has been experimentally determined that v = 15 ft/s when x = 0.6 ft and that v = 9 ft/s when x = 1.2 ft. determine (a) the vel
What is the change in the potential energy of the charge Q=1nC that has been moved from the point with the potential 2V to the point with the potential of 5V
The voltage between two charged parallel plates is 5 volts (the top plate has more negative potential). What energy is acquired by an electron that is moved from the bottom plate up to the top plate
Assuming that we can determine the Thevenin equivalent resistance of our wall socket, why don't toaster, microwave oven,and TV manufactorer match each appliance's Thevenin equivalent resistance to t
An amplifier operating from a single 15-V supply provides a 12-V peak-to-peak sine-wave signal to a I-ill load and draws negligible input current from the signal source. The de current drawn from th
Determination of a sized design layout of an aircraft concept to meet a given mission specification.
The voltage across a 10-µF capacitor is given by v(t)=100sin(1000t). Find expression for the current, power, and stored energy. Sketch the waveforms to scale versus time.
A function generator is adjusted to give a 60 HZ sine wave with no-load (open-circuit) voltage of 3Vrms. When a 1k ohm load is place across the output terminals of the function generator, the output
A DC power supply is adjusted to give a no load output voltage of 15 volts with the AC line voltage of 115 volts rms. A full load current of 1A is drawn into the circuit and the output voltage drops
The voltage drop across a 1 cm long resistor is 10 V. a) Calculate the electric field across the resistor; b) Calculate the work done by the electric field when it pushes a single electron through the
In an FM line of sight link , the frequency is 6 GHz and the beamwidth = 27 MHz the transmitting and receiving antennas have a gain of 33 dB , the receiving antenna is 40 Km apart from the transmitt
Design a continuous antenna array to have the following soace factor : [(sin(2πcosθ))/(2πcosθ)] , at a wavelength λ=.5 m namely,find : i- the current distribution and th
Design a uniform ordinary end-fire array to have a half power bandwidth (HPBW) no greater than 100°, namely : i- find the number of elements N, take the inter-element spacing d=λ/8. ii- fin
Design an ionospheric radio link over a distance of 2500 Km given that the ionosphere effective height is 275 Km and the electron density N= 2*1011 /m3, namely find : i- the angle of incidence on the
In a line of sight link , the transmitted power = 1 watt at the frequency of 11 GHz and the transmitting antenna has gain of 1000 , the receiving antenna is 40 Km apart from the transmitting station