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N=7 equal charges are located in the seven sides of a symmetrical octagon, distance R from the center. Obtain the direction and magnitude of the electric field at the center of the octagon.
a stable nucleus contains many protons very close to each other all positively charged. why do the protons not fly
A 386 g object is attached to a spring andexecutes simple harmonic motion with a period of 0.240 s. If the total energy of the system is5.48 J. Find the maximum speed of the object
a fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. the
A 1.5m long stick with a mass of 0.3 kg is pivoted on a hinge at one end and held horizontally with a spring by spring constant 10N/m attached at the other end. What is the frequency, f (in Hz), of small up and down oscillations of the stick?
a rocket is launched and attains a spped of 7900 ms when 35000 m abovve the surface of the earth. if the engines then
Two red blood cells each have a mass of 9.05 × 10-14 kg and carry a negative charge spread uniformly over their surfaces. What is the maximum accleration of the cells as they move toward each other and just touch
Light of wavelength 563 nm incident on a pair of slits produces an interference pattern on a distant screen in which the separation between adjacent bright fringes at the center of the pattern is 0.589 cm
A ball is thrown from the brink of a cliff 15.0 m high with an initial velocity of v0 = 7.0 m/s at an angle q0 = 26.0 o above the horizontal. How long does it take to land
a body is attached to one end of a horizontal spring that is fixed at its other end. due to the spring the body
A 52.0 kilogram person jumps from rest off a14.0 meter high tower straight down into the water. Find the magnitude of average force that water exerts on the diver
You want to build a grandfather clock with a pendulum that has one second between its "tick" (swinging to) and its "tock" (swinging fro)
A ball bounces upward from the ground with a speed of 14 m/s, How high above the ground does the ball hit the wall
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