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Estimate the fundamental frequency of vibration of a telephone line between adjacent poles. Assume the distance between poles is 50 m and tension ot the wire is 200 N. Typical telephone wire in the US has a cross section of 0.33 mm2. Density of copper is 8.90 g/cm3.
A 1.26 kilogram bocce ball tools at 2.3 meters per second on a smooth surface and strikes a 0.210 kilogram pallino ball. If ball friction and spin are ignored, what is the speed of each ball
A copper wire of length 0.5 cm is in a magnetic field of 2.0 T. If it has a mass of 1.0 g, what is the minimum current through the wire that would cause a magnetic force equal to its weight?
In walking across a carpet, you acquire a net negative charge of 60 μC. Find how many excess electrons do you have
A machine part rotates at an angular speed of 0.56 rad/s; its speed is then increased to 3.46 rad/s using an angular acceleration of 0.44 rad/s2, Find the angle through which the part rotates
What is the net force exerted by these two charges on a third charge q_3 = 53.5nC placed between q_1 and q_2 at x_3 = -1.100m
a transition in a nucleus consists of changing a three-quarks group uud to a udd collection. this transition is
A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 122 rpm about a verticalaxis, as we showed in Fig. 11.8.
A proton is shot perpendicularly at an infinite plane of charge. What must its velocity be so that it screeches to a halt exactly as it reaches the plane
A small moon of a giant planet has an orbital period of 1.43 days and an orbital radius of 4.69 multiply.gif 105 km. determine the mass of the planet
A train moving at a constant speed of 59.0 km/h moves east for 50.0 min, What is the average velocity of the train during this run
The heating element of a water heater in an apartment building has a maximum power output of 28 kW - What is the maximum possible temperature of the hot water that each showering resident receives?
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.25 m/s2 for 4.35 s, With what speed does the car then strike the tree
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