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Two identical metallic blocks resting on a frictionless horizontal surface are connected by a light metallic spring having a spring constant k as shown in the figure and an unstretched length Li. A total charge Q is slowly placed on the system, causing the spring to stretch to an equilibrium length L, as shown in the Figure. Determine the value of Q, assuming that all the charge resides on the blocks and modeling the blocks as point charges.
A parallel plate capacitor has an electric field between its two plates of 525,000 V/m. The two plates are 2.2x10-5 m apart. find the speed of the proton when it reaches the negative plate
A thin soap film (n = 1.33) has the uniform thickness. When white light strikes the film at normal incidence, blue light (b = 440 nm) is constructively reflected.
You have a string with a mass of 0.0133 kg. You stretch the string with a force of 9.81 N, giving it a length of 1.87 m. find the wavelength of the standing wave you create in the string
A straight ladder is leaning against the wall of a house. The ladder has rails 3.20 m long, joined by rungs 0.530 m long. What should be the thickness of the rock
The student throws a ball into the air along a path that he judges to make an initial angle of 59° with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes ball to rise verticall..
An Indy car with a speed of 125km/h goes around a level, circular track with a radius of 1.3km. What is the centripetal acceleration of the car.
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
An airplane flying horizontally 3600 ft above the ground at 120mi/hh, drops relief aid on the ground. Resolve the angle between the vertical and the line joining plane and target at the instant when he package is released.
Positive charges with magnitudes 3.50 mC and 6.75mC are located at the origin and at the point (10,0) metters on the x axis, respectively. What are the strength and direction of the field they generate at the point (0,10) on the y axis?
A cockroach of mass m lies on the rim of a uniform disk of mass 8m that can rotate freely about its center like a merry-go-round. at first the cockroach and disk rotate together with an angular velocity of 0.200 rad/s. Then the cockroach walks half..
Two lens system: The original object is 20 cm to the left of a lens with a focal length of +10 cm, Find the location and magnification of the final image. Be sure to show or tell me from where you are measuring this final location
A given copper wire has a resistance of 5.11 ? at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.61 ? at 20.0°C
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