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Initially, sphere A has a charge of -50e and sphere B has a charge of +20e. The spheres are made of conducting material and are identical in size. If the spheres then touch, what is the resulting charge on sphere A?
a 200 lbm bungee jumper jumps from a bridge 130 ft above a river. the bungee cord has an unstretched length of 60 ft
A steel rod is 3.000 cm in diameter at 25° C. A brass ring has an interior diameter of 2.992 cm at 25° C. At what common temperature will the ring now slide onto the rod?
A uniform rod of mass 3.20×10?2 and length 0.430 rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small rings, each with mass 0.190 , are mounted so that they can slide along the rod.
q1. a good baseball pitcher can throw a baseball toward home plate at 98 mih with a spin of 1590 revmin. how numerous
A 2000 kg sailboat experiences an eastward force of 3000 N by the ocean tide and a wind force against its sails with magnitude of 6000 N directed toward the northwest ( 45 degress N of W.) what is the direction of the resultant acceleration?
If an average frequency emitted by a 200,-,rm W light bulb is 5.00 times 10^{14} , {rm Hz}, and 10.0 percent of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second .
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
A 64 kg skier starts from rest at height H = 16m above the end of a ski-jump ramp (Fig. 8-39). As the skier leaves the ramp, his velocity makes an angle of θ = 32° with the horizontal. Neglect the effects of air resistance and suppose the ramp is fri..
When a potential difference of 221 V is applied to two plates of a parallel-plate capacitor, the inner surface of the positive plate carries a surface charge density of 40 nC/cm2. What is the spacing between the plates
A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure (101.325 kPa) and the density of the fluid in the manometer is 12.0 g/cm3. When the vessel is under 11.5 psi of vacuu..
Two converging lenses having focal lengths of f1 = 11.1 cm and f2 = 20.0 cm are placed = 50.0 cm apart, How far to the left of the first lens should the object be positioned
The isotope 210Po eventually decays after two transitions to stable 206Pb. Polonium was the isotope that was used to kill the former Russian KGB agent Alexander Litvinenko in November of 2006.
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