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Three equal point charges, each with charge 1.10 , are placed at the vertices of an equilateral triangle whose sides are of length 0.200 . What is the electric potential energy of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)
While on vacation you rent a moped and go cruising around a tropical island. If you take a 10.0 degree banked curve with a radius of 15.0 meters at 12.0 m/s, what is the minimum coefficient of static friction between your tires and the road to keep t..
find the angular speed after the grindstone. what must be its minimum mass so that material on its surface remains in place during the rapid rotation.
We have pumped 20 bbls of fluid from the cement unit. But we think that we should have already achieved 425 psi at the unit. We are rigged up to do F.I.T and have already pressure tested all surface lines and there are no leaks.
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
A galvanometer whose full scale current is 150amps and coal resistance is 75ohms is used with a 1.50 ohms shunt resistor to make an ammeter. what is the largest current that can be measured by the ammeter.
Fred and Barney are two electric charges that are to begin with held 1 meter apart and experience an electric repulsion of 10 pounds of force. What would be the force of repulsion between them be if the two were moved closer together so that they ..
While rearranging a dorm room, a student does 276 J of work in moving a desk 1.7 m. What was the magnitude of applied horizontal force.
Does current through a power supply increase when parallel bulbs are added? For example, if you have a circuit with one bulb and measure the current through the bulb to be 100 mA, what is the current through the power source when you add another b..
Estimate the change in COP of your electric food freezer when it is removed from your kitchen to its new location in your basement, which is 8 C° cooler than your kitchen. (Assume that the temperature in the kitchen is 20°C and that the temperature o..
The electric field everywhere on the surface of a thin, spherical shell of radius 0.785 m is of magnitude 850 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? Please show work.
A 5 kg rock is dropped from rest down a vertical mine shaft. How long does it take for the rock to reach a depth of 79 m? Neglect air resistance.
A highway curve with a radius of 555 m is banked properly for the car travelling 150 km/h. If a 1650 kg Porshe 928 S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid.
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