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A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 27.3 seconds after it is released, the electric field instantaneously changes to a constant, uniform electric field E2 pointing due South. 4.29 seconds after the field changes, the proton has returned to its starting point. What is the ratio of the magnitude of E2 to the magnitude of E1? You may neglect the effects of gravity on the proton.
you accelerate your car starting from rest. while the car is increasing its speed, the frictional force acting from the road on the tires? A) directed backword, opposing the motion B)IS directed vertically uo, C) is directed forward, in the direct..
A motorcycle has a constant speed of 21.0 m/s as it passes over the top of a hill whose radius of curvature is 132 m. The mass of the motorcycle and driver is 343 kg. Determine the magnitude of the normal force that acts on the cycle.
The time-varying current in an LC circuit where C = 11.5?F is given by i(t) = (1.30 A) sin (1230t), where t is in seconds.
What is the temperature T of the Concorde's skin in flight?
On a workday the average decibel level of a busy street is 72.0 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 50 every minute on a weekend, what is the decibel level of street.
Write down your expression in terms of the dipole moment. Express your reply in terms of, and appropriate constants.
When a second pipe is played at the same time, a 1.40 Hz beat note is heard. By how much is the second pipe too long.
Assume that each person is about the similar distance from the center of the field and can generate the same level of sound intensity. How numerous people are at the game.
A 0.150 kg ball is going around in a vertical circle of radius R = 0.300 m at constant speed v. The ball is attached to a mass less ideal string which is attached to a fixed pivot point. If the tension F in the string is greater than 125 N, the st..
Two sinusoidal waves, identical except for phase, travel in the same direction along a string, producing the net wave y(x,t)=(6.5 mm)sin(28.0x -4.0 s-1 * t+0.350 rad),with x in meters and t in seconds. what is the resultant amplitude of the two wa..
For a real train the friction between the car and the track can be described by a friction coefficient, μ. Find out this coefficient assuming that the time it takes for the car to come to rest is 3 s.
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
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