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1.Calculate the signal power that must be coupled from the antenna into the receiver in a cell phone to achieve a signal to-noise ratio of 10 dB, given that the center frequency is 880 MHz, the noise bandwidth is 30 kHz, the amplifier noise factor is F = 4, and the ambient temperature is 290°K.
2. For a blackbody at a temperature of 300°K, calculate the frequency at which the electromagnetic radiation spectrum will be peaked.
a very massive object traveling at 100 ms in the z direction strikes a very light object that is initially at rest. if
Find the magnitude and direction of the magnetic field at point ρ1, located d = 20.0 cm above the wire carrying the 4.65-A current.
Suppose that you hear a clap of thunder 15.5 s after seeing the associated lightning stroke. How far are you from the lightning stroke
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C, Calculate the value of the second charge
An AC generator has an output rms voltage of 78 V at a frequency of80 Hz. If the generator is connected across a 25-mH inductor, discover the: inductive reactance
A helicopter lifts a 70 kg astronaut 16 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. How much work is done on the astronaut by her weight? What is the speed of the astronaut just before she reaches the ..
A uniform ion beam of radius R consists if N' ions per meter ofmass m, speed v, and charge q. Find the Lorentz force (due toboth E and B) on an ion at the edge of the beam. At what speed would the force become zero?
A 4.0kg mess kit sliding on a frictionless surfaceexplodes into two 2.0gk parts, one moving at 3.0m/s, What is the orginal speed of the mess kit
Velma passes Mort at a speed of 0.75c. At this speed, the "time dilation factor" is 1.5. In other words, Mort observes a 1-second tick of Velma's clock to take 1.5seconds. assume that they are born at the same time, and that Mort observes himself ..
A 1055 kilogram van, stopped at a traffic light, is hit directly in the rear by a 660 kilogram car traveling with a velocity of +1.95 m/s. Determine the final velocity of each vehicle
A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. What is the mass of the disk
Assume the electric force on a proton due to some source charge q is F. Now assume we increase the distance between the proton and q by a factor of 4. Determine the force on the proton
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