ASTRO 209 lab 4-2

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Determine if the signal x[n] = 7sin(6 phi n) is periodic? If so, what is the fundamental period?a. Periodic with a fundamental period of 6 phib. Periodic with a fundamental period of 3c. Periodic with a fundamental period of 1d. Not periodic

an alternating current equation e=280 sin1256t what is the effective value of this signal a) 280 b) 560 c) 140 d) 395,92 e) 98,98 f) 197.96 g) 178.08

2. Define two variables: alpha = 5a/8, and beta = /8. Using these variables, show that the following trigonometric identity is correct by calculating the values of the left and right sides of the equation. sina cosß = [ sin(a – B) + sin(a + B)] %3D

q26

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signal and system

I need help creating a graph in Excel for the tables below. It needs to be Vce vs Ic and plots the Ib average for each table. The averages are below. Please show step by step.  V1 = 4V V2 (V) Ib (µA) Ic (mA) Ie (mA) Vce (mV) Beta 0 11.5 -0.00794 -0.00356 7.94 -0.000690434783 1 11.1 0.701 -0.712 299 0.0631531532 2 11.1 0.711 -0.722 1290 0.0640540541 Table 1: V1 = 4, V2= 0-2 V   V1 = 6V V2 (V) Ib (µA) Ic (mA) Ie (mA) Vce (mV) Beta 0 18.1 -0.0105 -0.00761 10.5 -0.000580110497 1 17.8 0.856 -0.874 144 0.0480898876 2 17.8 1.20 -1.22 797 0.0674157303 3 17.8 1.22 -1.25 1780 0.0685393258 Table 2: V1 = 6, V2= 0-3 V   V1 = 8V V2 (V) Ib (µA) Ic (mA) Ie (mA) Vce (mV) Beta 0 24.7 -0.0123 -0.0125 12.3 -0.000497975709 1 24.5 0.878 -0.903 122 0.0358367347 2 24.4 1.71 -1.73 291 0.0700819672 4 24.4…

Q. 1 Determine if the following signals are periodic. If yes, calculate the fundamental period for the signals. i. ii. x[k] = 5 x (-1)k x[k] = exp (i (7)) + exp (i())

The relaxation time of mica (0 = 10-15 mho/m, &r = 3) is 9.82 hrs 2.456 hrs 4.912 hrs 7.36 hrs

1 Consider a periodic pressure-time record as shown in the figure below. Determine its frequency spectrum. Pressure 15 100 psi 0 2 N 6 8 4 10 12 t(s)

the fundamental period of x[n]=4. sin (6.pi.n) is pi=3.14159265359 O 2 4 1 the smallest angular frequency of discreet time sinusoidal signal x[n] has N=6 is: O pi/2 pi/3 O pi/4 O 2pi

Determine whether or not each of the signals is periodic. If a signal is periodic, determine the fundamental period. (a) (b) (c) (d) x(t) = Ev { sin(4π t) u(t)} x(t) = e(²t-n) x[n] = n=0 = cos os (n) cos (n) x[n]cos (n) = COS

What is the phase angle between two 60-hertz voltages generations separated by a time interval of three milliseconds? Carry the answer to one decimal place. Hint: Theta = 360 *t *f

Find the effective value of a periodic current in a 20-ms period that has a value 0.761A for 4ms, 0A for 2ms, -0.925A for 8ms, and 1.23A for 6ms. Would the effective value be different if the time segments was in seconds instead of ms? Why?

Determine the frequencies for periodic times of 4 ms, 4µs

The pulse voltage waveform displayed on a CRO, is shown in figure given below. Find:(a) Frequency.(b) Magnitude of the pulse. (c) The amplitude.

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For the periodic current plotted below, determine the effective current: Current Plot 150 125 100 75 50 25 10 15 20 25 Time (msec) Current (mA)

Rectangular metal wave guide.

An antenna has directivity of 100 and operates at 150 MHz. The maximum effective aperture is (A) 31.8 m' (B) 62.4 m (C) 26.4 m2 (D) 13.2 m2

Determine whether each of the following signals is:i. periodic or not; if periodic, find the fundamental period. ii. even/odd/neither.

Q 2 p

Q2) circle around the alphabet of the correct answer: 1. one of the following signals is non-periodic signal b) cos3at – 2sin9t a) sin3t + sin 9t c) cos 3t + sin(4t + 7) d) cost +sin(9t – ) e) None 2. one of the following signals is power signal b) rect (t) a) sinc (t) c) u(t) d) e*u(t) e) None 1

Determine  period or aperiod , if it is periodic find the fundamental period.

:The following signal is g(t)= cos(1?t)+sin(2n²t/3) إختر أحد الخيارات .a periodic with period 30/T .b aperiodic .c periodic with period 6/m .d periodic with period 5/Tt

333 Q5)A- Plot the amplitude and phase spectrum for the f(t) = 4cos(aft +30°) + 2 sin(ft)

Please explain nicely. I can not read some experts hand-writing. So, please write nicely. Explain all steps briefly. Thanks a lot.