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A mining company is in need of four trucks. Suppliers will offer the options of purchasing or leasing the trucks. The purchase price is $200,000. Maintenance, insurance, and general operating costs (payable at the end of each year) will be $30,000 in year 1, $40,000 in year 2, and $50,000 in year 3 with an expected salvage value of $70,000 at the end of year 3. The lease price is $80,000 per year for the 3 years (payable at the beginning of each year). The lease covers maintenance costs, but insurance and general operating costs will be $25,000 per year (payable at the end of each year). If the company's MARR is 20%, determine the best economic choice.
a) Design a band-pass filter consisting of an RC high-pass filter with a cutoff frequency of 300 Hz and an RC low-pass filter with a cutoff frequency of 3400 Hz. Carefully select R and C of each filter so that one filter does not load the other
A 12.5 nF capacitor is fully charged by a 12 V source. a) What is the charge on the capacitor b) What is the energy stored in the capacitor. Now the charged capacitor is disconnected from the source and a dielectric, porcelain, is placted between the..
What is the region of operation of an enhancement NMOS device if the gate is connected to the drain and a positive voltage greater than the threshold is applied to the drain with respect to the source? If the applied voltage is less than the thr..
Flip-flops must be in what mode (Set, Reset, Hold, or Toggle) in order to divide a clock's frequency when building a counter What is the advantage of a synchronous counter as compared to a ripple counter
Design an interface for a 12 V, 500 mA bipolar stepper motor. There are 200 steps per revolution. Write software to spin the motor at 1 rps.
Suppose you have a 2 kW electric heater rated for 220 volt operation, which you intend to operate at a reduced power dissipation of 1kW. Calculate the proper amount of voltage you would need to achieve this reduced power dissipation
In actual electronic work, capacitances range from 30 picofarads, to 60 microfarads, to 5 farads. Assuming that each of these capacitances is charged to five volts, find for each a) the stored charge in coulombs, b) the number of electrons stored ..
A 1,000 kVA, 3,200V, single phase 60Hz, 24 pole alternator/generator has an stator winding re-sistance of 0.1 ohm from line-to-neutral. The rotor is not a permanent magnet but a separately pow-ered electromagnet (field windings)
A BJT differential amplifier is biased to have 500uA dc current in each device, β = 100, RC1 = RC2 = 1Kohm, and RE = 3Kohm. Assume ro = ∞. When operating in balanced in, balanced out mode what is the maximum allowable resistor tolerance
A sample of vinegar is 4.8% acetic acid, HC2H3O2, by weight, andhas a density of 1.00g/mL. Calculate (a) the grams of acetic acidin 1 liter of vinegar (b) the molarity of acetic acid invinegar. calculate the concentration of an ..
The work-piece motion of a certain system is measured using an LVDT that outputs 12mV/cm. (i) If the output from the LVDT ranges from -12mV to 24mV, what is the maximum horizontal motion of the work-piece motion
What pressure would you expect for 5 ft of water?
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