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Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.107 N when their center-to-center separation is 46.6 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0321 N. Of the initial charges on the spheres, with a positive net charge, what were (a) the negative charge on one of them and (b) the positive charge on the other? (Suppose the negative charge has smaller magnitude.)
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. Find the final speed of puck A
The maximum wavelength an electromagnetic wave can have and still eject an electron from a copper surface is 264 {\rm nm}. What is the work function of a copper surface?
in the bohr model of the hydrogen atom an electron in the 4th excited state moves at a speed of 1.37 105 ms in a
A 10.0 O resistor, 10.0 mH inductor and a 110.0 µF capacitor are connected in series with a 50.0 V (rms) source having variable frequency. Find the energy delivered to the circuit during one period
A glass block (n = 1.56) is immersed in aliquid. A ray of light within the glass hits a glass-liquid surfaceat a 63.0° angle of incidence. What is the smallest possiblerefractive index for the liquid
A coil has an induced voltage of 120 volt when the rate of flux change is 0.4 Wb/s. How many turns are in the coil
A rocket fires two engines simultaneously. One produces a thrust of 725 N directly forward while the other gives a thrust of 513 N at an angle 32.4^\circ above the forward direction. Find the magnitude of the resultant force
A telescope is designed using an objective lens f focal length f(obj)=2m and an eyepiece of focal length f(eye)=8cm. Find the location and size of the image of Jupiter formed by the objective lens
A vertical containery with base area measuring 14.0 cm by 17.0 cm is being filled with identical pieces of candy, each witha volume of 46.0 mm3 and a mass of 0.0208 g.
in rutherfords scattering experiments alpha particles charge 2e were fired at a gold foil. consider an alpha particle
the piston of a hydraulic automobile lift is 0.330m in diameter.part a what gauge pressure in pascals is required to
a solid aluminum ingot weighs 92 n in air.a what is its volume?b the ingot is suspended from a rope and totally
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