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The cell is divided into three sectors and each user employs a directional antenna and voice activity provision. The effective Eb/I0 at the input of a conventional receiver is 4.5 dB and the noise
After the collision, the velocity of the bluepuck is 0.050 m/s in the same direction as its initial velocity. Find (a) the velocity (magnitude and direction) of the red puck after the collision; and
The ball is released from rest with the string taut and horizontal (theta = 90.0 °). Find (a) speed of the ball as it swings through the lowest point (theta = 0 °) , and (b) the tension in t
A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal. She pulls on the strap with a 35.0-N force. This fricti
What is the semi-major axis of the orbit traced out by the more massive star? c). If the eccentricity e=0.4, what is their closest approach to each other.
a) sketch the "before" and "after" situations. specify all the given parameters. b) Write down the four-momentum column vectors of the initial particle and the final photon (in terms of M)
If it startsfrom rest at x = 5 cm and reaches x = 2.5 cm for the first time after 2 s, find (a) theposition at any time t after it starts, (b) the speed at x = 0, (c) the amplitude, period andfreque
A toroidal selenoid has inner radio r1= 15.0 cm and outer radius r2= 18.0 cm. The selenoid has 250 turn and carries a current of 8.50 A. What is the magnitude of the magnetic field at the following
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, the origin, at t = 0 and moves to the right. The amplitude of its motion is 2.7 cm, and the freque
A proton and an alpha particle (q = +2e, m = 4 u) are fired directly toward each other from far away, each with an initial speed of 0.011 c. c is the speed of light (3.0 x 10^8 m/s) What is their di
Compare the average electric fields generated by the two devices - how many times stronger is the electric field that is generated by the cellphone than the maximum permissible field leaking from a
What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?
Two 10-cm-diameter charged rings face each other, 23.0cm apart. Both rings are charged to + 40.0nC . What is the electric field strength at the midpoint between the two rings? and at the center of t
An inferometer consists of 50 parabolic antennas placed 14 m apart. It operates at a wavelength of 21cm. Compute the angular seperation between principle maxima and the angular width of the zero or
For the isomerization of n-butane to isobutene we have G= -RT LnK where R= 1.9872 and K= (isobutene)/(n-butane) The temperature dependent Gibbs free energy (in calories) for isobutene and nbutane ar
A 1900 kg car rounds a curve of radius 70 m banked at an angle of 12 °. What is the magnitude of the friction force required for the car to travel at 86 km/h
At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
The Fermi level lies 0.520 eV above the valence band in a sample of silicon at 300k. This should be a p type material. Find the majority and minority carrier concentrations.
What is the anguar momentum of the disk if it rotates about a parallel axis through its perimeter at the same angular velocity?
A 8.5 kg object undergoes an acceleration of 2.3 m/s2. a) What is the magnitude of the resultant force acting on it?
If you assume the atmosphere to be pure carbon dioxide, calculate the compressibility factor at the surface of Venus. Also determine the volume of 10 kg of carbon dioxide vapor at the surface of Ven
The final pressure is 1 bar. Determine the final temperature and volume if the exergy destruction is 15 kJ. Is the ammonia before or after this process an ideal gas? Give your answers and your reaso
A heat transfer from the system also occurs at a temperature of 1000 K. There are no other heat transfers. If no internal irreversibilities are present, determing the thermal efficiency.