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A single conservative force = (4.0x - 12) N where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 20 J at x = 0. (a) Write an expression for U as a function of x, with U in joules and x in meters. U(x) = (b) What is the maximum positive potential energy? (c) At what negative value of x is the potential energy equal to zero? (d) At what positive value of x is the potential energy equal to zero?
Consider the situation where a 5 kg block sits on top of a 10 kg block. The two blocks rest on a horizontal frictionless surface. What is the acceleration of the "two block" system
The surface between a 12kg block , the 16kg wedge and between 16 kg wedge and the horizontal plane are smoothe, What is the force F which must be exerted on the 16 kg block in order that the 12 kg block
An ac generator with a frequency of 150Hz and an rms voltage of 22.5V is connected in series with a 15.0kilo ohms resistor and a 0.210microF capacitor. What is the rms current in this circuit?
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 79.9cm, Calculate the weight of the rod, w
Electric charge can accumulate on an airplane in flight. You may have observed needle-shaped metal extensions on the wing tips and tail of an airplane. Their purpose is to allow charge to leak off before much of it accumulates.
A small telescope has a concave mirror with a 4.00-m radius of curvature for its objective. Its eyepiece is a 4.25-cm focal length lens. What is the angle of its telescopic image?
to combat wasteful habits we often speak of "conserving engery", by which we mean turning off lights, find the difference in energy conservation and conserving energy
A power plant burns coal and generates an average of 600.0 MW of electrical power, Find the total electrical energy generated by the plant in a 30-day period
Two 2.0cm x 2.0cm plates that form a parallel-plate capacitor are charged to (+/-) 0.708 nC.what are the electric field strength inside and the potential difference across the capacitor if the spacing between plates.
A horizontal 605 N merry-go-round of radius 1.31 m is started from rest by a constant horizontal force of 77.9 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-go- round
A converging lens with a focal length of 31 cm is used to form an image on a screen that is 2.7 m to the right the lens. Where must the object be placed
A sealed container contains 7 moles of neon gas at STP. Estimate the number of neon atoms having speeds in the range from 188.0 m/s and 192.0 m/s
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