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Point charges of 2*10^-9C are situated at each of the three corners of a square whose sides is 0.20m. What would be the magnitudes and direction of the resultant force on a point charge -1.0*10-9C if it were placed (a) at the center of the square? (b) at the vacant corner?
When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases uniformly from 10.0 rad/s to 6.30 rad/s in 5.00 s. What is the magnitude of the angular acceleration of the fan
An LRC series circuit with R=150 ohlms, L=25 mH, and C=2 uF is powered by an ac voltage source of peak voltage Vo=340V and frequency f=660 Hz. Determine the peak current that flows in this circuit
A uniform Gravitational Field: Calculate the Reimann curvature for the metric ds^2=-(1+gx)^2dt^2+dx^2+dy^2+dz^2, thereby showing this spacetime is flat. Find a coordinate transformation that puts this metric into the usual Minkowski form.
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 4.0 m/s, and an 83 kg p..
In a Franck-Hertz type of experiment, atomic hydrogen is bombarded with electrons and excitation potentials are found at 10.21 V and 12.10 V. find the wavelengths of the observed spectral lines
A prism with angles 45ο , 45ο,and 90ο is to be utilized to turn a beam of light during a 90ο angle. What is the minimum index of refraction for the material of the prism that will give the total internal reflection required?
Within cells, small organelles containing newly synthesized proteins are transported along microtubules by tiny molecular motors called kinesins. What force does a kinesin molecule need to deliver in order to accelerate an organelle with mass 0.01..
"Egypt in Turmoil" Please respond to the following: Explain the causes of the turmoil in Egypt in early 2011. Elaborate on at least two perspectives on the situation. Appraise the prospects for the Muslim brotherhood in Egypt now that that count..
A 125-kg sled is dragged by a team of dogs a distance of 2 km over a horizontal surface at a constant velocity. Find the work done by the team of dogs
A space probe which is a distance of 1.6×1010 m from a star measures the total intensity of electromagnetic radiation from the star to be 5700 W/m^2. what is its total average power output
A UFO is observed directly above the earth moving at a constant velocity. An astronaut on the moon (3.8 108 m from earth) observes the UFO passing overhead 5.1 s later. From the UFO's reference frame, how long did it take to travel from the earth to..
The given pair of capacitors in the figure below is fully charged by a 10.0-V battery. After 1.20 ms, what is the current in the resistor
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