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Vending machine. The time between consecutive uses of a vending machine is Exponential with average 15 minutes.
a. Given that the machine has not been used in the previous 5 minutes, what is the probability that the machine will not be used during the next 10 minutes?
b. How many purchases are expected within the next hour?
c. What is the distribution of the number of purchases to be made within the next hour?
d. Suppose that a person pays 75 cents for each beverage in the vending machine. The supplier pays 40 cents per beverage in the machine, and thus makes a profit of 35 cents per beverage. What is the expected profit made during a given 8 hour period?
Why the circuit Current (I) decrease, when Inductance (L) or inductive reactance (XL) increases in inductive circuit?
A resistor and capacitor are connected in parallel to a 120 volt, 60 Hz line. The circuit has a current flow of 3 amperes. The resistor has a resistance of 68 ?. What is the capacitance of the capacitor?
Create a plot of the measured SNR (dB) versus the number of bits.
1. Provide 3 ways for creating proto-types of an electronic circuit. 2. Explain briefly, in outline form, and in your own words, the procedure for creating a single-sided, PCB (Printed Circuit Board), using the etching procedure.
Consider the Hamming code defined by the parity-check matrix of Figure E7.8 (note that the columns of H are organized in increasing order of the corresponding decimal values, that is, H = [1 2 3 4 5 6 7]).
Design a combinational circuit which takes as input the 7-bit unsigned binary integer B = B6B5B4B3B2B1B0 and which outputs the 4-bit mantissa M = M3M2M1M0 and the 2-bit exponent E = E1E0 of the floating-point representation of the number.
Reactors for naval vessels are designed to have very long lifetimes without the need to refuel. Discuss possible techniques that can be used to maintain criticality over the core lifetime as 235U is consumed.
The use of the parameter module for the frequency range requires a special physical understanding in practical appliance. Please name some case studies in this context and try to find a generalizing statement to its use.
determine thecenter and the surface temperatures of the chicken in 2 h and 30 min. Also, determine if any part of the chicken will freeze during this process.
Given a DSP system in which a sampling rate of 8000 Hertz is used and the antialiasing filter is a second order Butterworth low pass filter with a cutoff frequency of 3.2 KHz determine a. The percentage of aliasing level at cutoff frequency
A long copper wire of circular cross-section and resistance 0.05 O has a potential difference of 0.10 V applied across its ends. The wire is then melted and reformed into a wire of circular cross-section that is twice as long.
Express both of these reference temperatures (3 and 290 K) in degrees fahrenheit.
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