7.45 The dynamic equations of motion for a station-keeping satellite (such as a weather satellite) are *- 20ý – 3ux = 0, + 2wk = 4, where x = radial perturbation, y = longitudinal position perturbation, u = engine thrust in the y-direction, as depicted in Fig. 7.95. If the orbit is synchronous with the earth's rotation, then o = 27 /(3600 x 24) rad/sec. Problems 625 Figure 7.95 Diagram of a station-keeping satellite in orbit for Reference longitude Desired location Problem 7.45 on orbit

7.45 The dynamic equations of motion for a station-keeping satellite (such as a weather satellite) are *- 20ý – 3ux = 0, + 2wk = 4, where x = radial perturbation, y = longitudinal position perturbation, u = engine thrust in the y-direction, as depicted in Fig. 7.95. If the orbit is synchronous with the earth's rotation, then o = 27 /(3600 x 24) rad/sec. Problems 625 Figure 7.95 Diagram of a station-keeping satellite in orbit for Reference longitude Desired location Problem 7.45 on orbit

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

A 50 V voltage generator at 20 MHz is connected to the plates of an air dielectric parallelplate capacitor with a plate area of 2.8 cm2 and a separation distance of 0.2 mm. Find the maximum value of displacement current density and displacement current.
(a) If the cross section of the toroid of Figure 7.15 is a square of side a, show that the self-inductance of the toroid is L = μ №²a 2πT In [2p. + a 2po a
C: Under same conditions (all the variables are equal) of air density factor (8), irregularity factors (mm), radius (r) and space (d): the phenomenon of corona is happened. Prove mathematically that the visual critical voltage is bigger than the disruptive critical voltage.
Transfer the point P (6.32, 108.43°, 3) into spherical coordinate a) (5, 65.62°, 106.43°) b) (6, 66.62°, 107.43°) c) (7, 64.62°, 108.43°) d) (8, 64.62°, 107.43°) с O DO B A O
Find the angle in radians subtended at the centre of a circle having radius 12 cm and whose arc length measures 20 cm
1)Seismologists and geophysicists have determined that the vibrating Earth has a resonance period of 54 min and a Q factor of about 400. After a large earthquake, Earth will ″ring″ (continue to vibrate) for up to 2 months. Question 1 i))Express the fractional change in energy as a function of Q is a)\frac{\delE}{E} = \frac{2\pi}{Q} b)\frac{\delE}{E} = \frac{4\pi}{Q} c)\frac{\delE}{E} = {2\pi Q} d)\frac{\delE}{E} = \frac{\pi}{2Q} ii)) Find the percentage of the energy of vibration lost to damping forces during each cycle. a)0.0157 b)0.021 c)0.0267 d)0.031 iii))Express the energy of the damped oscillator after one cycle is a)E_1 = E_0 \left(1 - \frac{\del E}{E}\right)^\frac{1}{2} b)E_1 = E \left(1 - \frac{\del E}{E}\right)^2 c)E_1 = E_0 \left(1 - \frac{\del E}{E}\right) d)E_1 = E^2 \left(1 - \frac{\del E}{E}\right) iv))Verify that after n periods the vibrational energy is given by En = (0.979)n EO , where EO is the…
A lightning strikes a 30-m unshielded over-head transmission line tower Which has the following parameters Surge impedance of the tower= 100ohms Surge impedance of lightning channel at tower top =500ohms Tower-footing resistance=10ohms Tower height =30 m Cross-arm height=27m The lightning strike current is assumed to be a constant 30 kA for a duration of 20 µs. The traveling wave propagation speed in the tower is 1.2* 108 m/s. a)draw the voltage lattice diagram with proper labels of the time b) ignoring the phase voltage, determine the insulator voltage after 2µs. c) The insulator voltage approaches a constant value after 2 µs. If the basic impulse insulation level (BlL) of the insulator for phase conductor is 150 kV, evaluate the condition of the insulator and conclude the type of power quality problem that will occur for an end-user facility connected to the transmission line. Assume that the surge arresters and circuit breakers at the end-User facility are working properly.
Problem 7.1 The magnetic field of a wave propagating through a certain nonmagnetic material is given by H= 230cos(10°t – 0.5y) (mA/m). Find (a) the direction of wave propagation, (b) the phase velocity,. (c) the wavelength in the material, (d) the relative permittivity of the material, and (e) the electric field phasor.
a) A lightning strikes a 30-m unshielded over-head transmission line tower which has the following parameters: Surge impedance of the tower= 100 2 Surge impedance of lightning channel at tower top = 500 2 Tower-footing resistance = 10 Tower height = 30 m Cross-arm height = 27 m %3D %3D %3D %3D The lightning strike current is assumed to be a constant 30 kA for a duration of 20 us. The traveling wave propagation speed in the tower is 1.2 x 10 m/s. i) Determine the voltage reflection coefficients at tower top and tower foot. ii) Determine the time of travel from tower top to tower foot. iii) Determine the time of travel from cross arm to tower foot. iv) Draw the voltage lattice diagram with proper labels of the time. v) Ignoring the phase voltage, determine the insulator voltage after 2 us,
an insulting sphere of radiusb8.0 cm carries a unifirm volume cahrge densuty of 500 n C/m^3 . Wahat is the electruc field in N/C at r=3.0 cm?
You are observing a star which has a normal measured flux of 24.0 photons per second. The brightness of the star shows regular dips - transits caused by a planet in an edge-on circular orbit. During each dip, the brightness of the star decreases by 0.07200000000000006 photons per second. Transits repeat every 5.2 days. If the star has a radius of 4.1 x 10 m, a mass of 1.6 x 10"kg and a luminosity of 1.3 x 1040W, what is the radius of the planet (in metres)? 26
(2) lahäi Convert the point (3,4,5) from Cartesian to spherical coordinates (0.707,45°,53°) O (7.07,54°,63°) O (0.707,54°,63°) O (7.07,45°,53°) O