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A small object of mass 0.025 kg and charge 2.5 µC hangs from the ceiling by a thread. Asecond small object, with a charge of 4.2 µC, is placed2.5 m vertically below the firstcharge.
(a) Find the electric field at the position of the upper charge due to the lower charge.
(b) Find the tension in the thread.
determine the effect of nuclear mass on the first line of the balmer series of hydrogen by calculating its wavelength
A 0.25-kilogram mass on a vertical spring oscillates at a frequency of 2.0 Hz. If a 0.60-kilogram mass were instead suspended from the same spring, what would be the frequency of oscillation
A circuit consists of a resistor and a capacitor in series with an ac source that supplies an rms voltage of 240 V. What is the average power supplied by the source
An electric potential is given by V = 4x^2 + 2y^2 + x + z + 2 volts. What is the electric field at the point (2,2,2)
during a racing event a 1400 kg car accelerates from 0 to 31 ms in 4.5 s. what is the net force exerted on the car?a
A series RLC circuit has components with following values: L = 20.0 mH, C = 100 nF, R = 20.0 Ohm, and dVmax = 100 V, Calculate the average power in the resistor at resonance
It is common to see birds of prey rising upward on thermals.The paths they take may be spiral-like. calculate the speed of the bird relative to the ground
A 66.0-kg skier starts from rest andslides down a 33.0-m frictionless slopethat is inclined at an angle of 15.0° with the horizontal.Ignore air resistance. >> If the slope is not frictionlessand the skier has a velocity of 4 m/s,
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
The lenes of a particular set of binoculars have a coating with index of refraction n=1.38, If the lenses refelct a wavelength of 540nm the most strongly, what is the minium thinkcness of the coating
A 330 N sphere 0.20 m in radius rolls,without slipping, 6.0 m down a ramp that is inclined at31° with the horizontal. What is the angular speed of the sphere
the plates of a spherical capacitor have radii 3.7 cm and 4 cm with a vacuum in between them.a. find the surface area
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