Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
a. The flow velocity in the test section of a low-speed subsonic wind tunnel is 100 mph. The test section is vented to the atmosphere, where atmospheric pressure is 1.01 × 105 N/m2. The air density in the flow is the standard sea-level value of 1.23 kg/m3. The contraction ratio of the nozzle is 10-to-1. Calculate the reservoir pressure in atmospheres.
b. By how much must the reservoir pressure be increased to achieve 200 mph in the test section of this wind tunnel? Comment on the magnitude of this increase in pressure relative to the increase in test-section velocity.
In a certain system, an electrical heating element was found to increase the temperature of a piece of metal 7o for each amp of current. The metal expands 0.004 in./deg and pushes on a load sensor that outputs 1 V/0.003 in.
The power factor of a load connected to a 120-V 60-Hz source is raised from 0.866 lagging to 0.966 leading by connecting a 110.5-?F capacitor in parallel with the load. Determine the load current I1 and the circuit current IT.
State the two conditions that must be satisfied to give an oscillatory output, and determine the required value of G to give an oscillatory output if H = -10 dB.
Show that it moves in a cycloidal path, and find the drift velocity, or the velocity of the center of the rolling circle along the z axis. If the electric field is 10^4 volts/cm and the magnetic field is 10^4 gausses, find the value of the drift v..
a single silicon photovoltaic cell is found to have an open-circuit voltage of 0.6 v and a short-circuit current of
Consider a p-type semiconductor substrate with Na =10^15 cm^-3. A region of heavily p+ doped material is formed by ion implantation as shown in the sketch below.Derive an expression for the built-in voltage under equilibrium conditions.
A dc shunt motor drives a centrifugal pump at a speed of 1000rpm when the terminal voltage and the line currents are 200V and 50A, respectively. The armature and field resistance are 0.1 ohm and 100 ohm respectively.
A spherically-symmetric charge distribution in free space (with a
Vo(t) = RC (dVi(t)/dt). Suppose you have a triangle waveform as input to the differentiator with 100pF capacitance and 100 Ohms. The peak to peak voltage of the triangle waveform is 10Vpp and its frequency is 100k Hz.
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 resistance is 8.5 ohms.
Calculate the minimum PWM frequency for a small permanent magnet DC motor with a time constant of 15 milliseconds.
Consider a 4 channel CDM system with the following CHIPS: A: -1 -1 -1 1 B: -1 -1 1 -1 C: -1 1 -1 -1 D: -1 1 1 1 a) Show that each one of those chips is orthogonal to all of the others. b) If the CDM signal 1 -1 -3 1 is received, by all receivers, ..
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd