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A sphere of radius R= 2 m has a non-uniform charge density that varies with the distance from its center as given by ρ(r)=ar2 (r≤R) where a=1.1 nC·m-5. What is the magnitude of the electric field at a distance of 1.9 m from the center?
a woman on a bridge 96.0 m high sees a raft floating at a constant speed on the river below. she drops a stone from
From a physical security perspective, what are the two primary purposes of efficient illumination? How does lighting enables or deters criminal activities?
Positive charge +Q is dis- tributed uniformly around the left half of the semicircle, and negative charge -Q is distrib- uted uniformly around the right half of the semicircle . What are the mag- nitude and direction of the net electric field at t..
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. determine the recoil velocity
How to generate a constant deceleration
In the circuit the inductor is 2.65H and when connected to a capacitance C it will form a low frequency oscillator of 20.0 Hz. The circuit is energized by charging the capacitor with a 12.0 V battery (switch at a) first and then connecting L and C..
Fixed in the frame F is a sheet of charge, of uniform surface density sigma, which bisects the dihedral angle formed by the x-y and the y-z planes. What is the surface charge density sigma prime
The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.42 m/s. What direction (in degrees) should the captain steer the boat
A bicycle and rider have a combined mass of 70.0 kg and are moving at 6.00 m/s. A 70.0 kg person is now given a ride on the bicycle (total mass 140.0 kg). How did the addition of the new rider change the kinetic energy at the same speed?
flight to mars. to send a satellite from earth to mars a rocket must accelerate the satellite until it is in the
A sound wave of velocity 330 m/s and wavelength 0.70 m is produced for 0.50 s. What is the frequency of the wave? How many complete waves are emitted in this time interval? After 0.50 s, how far is the front of the wave from the source of the sound?
You need to use your cell phone, which broadcasts an 720 MHz signal, but you're behind two massive,radio-wave-absorbing buildings that have only a 13 m space between them. What is the angular width ofthe electromagnetic wave after it emerges from bet..
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