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A stepper motor is being used as a crane motor in an expensive toy. The motor has the following properties: Holding torque = 35 in. · oz, dynamic torque = 20 in. · oz, and detent torque = 5 in. · oz. The motor turns a 1.5-in. diameter pulley around which a string is wound. How much weight can the crane lift? How much weight can the crane continue to support with the power on; with the power off?
Write an equation for the following sequence (use only 3 variables for the right-hand side): The overflow indicator V will turn on iff X is negative, Y is positive and D is positive, or if X is positive, Y is negative and D is negative.
Sketch the torque speed characteristic of a delta-connected 220-V-rms 5-hp four-pole 60-Hz three-phase induction motor. Estimate values and label key features for things such as the full-load running speed, the full-load torque, the pull-out torq..
Supposed that the terminals are labeled a,b. V(ab) = -15 V, how much energy is exchanged when a positive charge of a 4 C moves through the device from a to b. Is the energy delivered or taken from the device.
ECG Amplifier Project Description
The shaft output of a three-phase, 60 Hz induction motor is 100 HP. The friction and windage losses are 900 W, the stator core loss is 4200 W, and the stator copper loss is 2700 W. If the slip is 3.75%, what is the effïciency of the motor
the voltage across and current through a certain device are given v(t)= 5cos(4πt), i(t)= 0.1cos(4πt) a) the instantanous power p(t) at t=0 andt=0.25s b) the average power Pav, define as the averga value p(t)
A lossless transmission line is embedded in a medium having a dielectric constant of 9. The per-unit length capacitance of the line is given as 100 pF/m. a.Find the wave velocity in the medium.
design a combinational circuit that, when given a 3-bit binary number as an input, will produce a binary number equal to the square of the input number as an output. Find the simplest expression for the outputs using K-maps.
A material has a dielectric constant of εr=3.0 andhas an atomic density of 1028 atoms per cubic meter. Ifonly two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair
A shipment of 100 items undergoes a selective inspection. 5 items are selected at random from the shipment and they are tested. What is the probability that the shipment will be rejected given that is contains 2% defective items
A in which t is in seconds and the angle is in radians. a. Sketch i(t) to scale versus time for t ranging from 0 to 15ms. B. Determine the net charge that passes through the element between t = 0 and t = 10ms. C. repeat for the interval to t = 15m..
A residential four-wire system supplies power at 220V rms to the following single-phase appliances: On the first phase, there are ten 75-W bulbs. On the second phase, there is a 750-W vacuum cleaner with a power factor of 0.87.
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