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Two identical + 9.0 C point charges are initially 2.5cm from each other.
If they are released at the same instant from rest, how fast will each be moving when they are very far away from each other? Suppose they have identical masses of 1.0mg.
A runner makes one lap around a track in 68.0s. The track is oval, has two straight 100m stretches with a semicircular bend (radius of 50m) at each end. What was the runner's total displacement for the lap
At rest, a car's horn sounds at a frequency of 385 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the similar direction with one-third the car's speed hears a frequency of 342 Hz. What is the speed of the ca..
A uniform solid sphere rolls without slipping down a 19° inclined plane. What is the acceleration of the sphere's center of mass
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 23.0m/s as it leaves the hose nozzle. How high above the ground does the water strike the building
a circular loop of wire of radius 6.0 cm has 10 turns and lies in the yz plane. it carries a current of 5 a in such a
A girl makes a microscope with a 3.0 cm focal length objective and a 5.0 cm eyepiece. the microscope tube length is 10 cm. Find expected magnification of this microscope
An ultraviolet lamp emits light of wavelength 400nm at the rate of400W. An infrared lamp emits light of wavelength 700nm, also at therate of 400W. Which lamp emits photons at the greater rate
two charges are placed on the x axis. one of the charges q1 9.3 microc is at x1 3.1 cm and the other q2 -18 microc
Note the gravitational acceleration of equatorial sea level is g = 32.0088ft/s^2 and that its variation is 0.003ft/s^2/ 1000ft ascent. find the height in miles above its point for which g = 30.504 ft/s^2 and what is the weight of a 180lb man on top o..
An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat c..
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
If the pendulum makes a maximum angle of 5.4? with the vertical, what is the length of the pendulum
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