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Urn A contains five balls: one black, two white, one green and one pink; urn B contains five hundred balls: two hundred black, one hundred white, 50 yellow, 40 cyan, 30 sienna, 25 green, 25 silver, 20 gold, and 10 purple. [One fifth of A's balls are black; two-fifths of B's are black.] One of the urns is selected at random and one ball is drawn. The ball is black. What is the probability that the urn is urn A?
An electron of kinetic energy 35 keV moves in a circular orbit perpendicular to a magnetic field of 0.390 T. Find the radius of the orbit
The prong of a tuning fork moves back and forth when it is set intovibration. The distance the prong moves between its extremepositions is 2.29 mm. If the frequency ofthe tuning fork is 440.5 Hz, what are the maximum velocity and the maximum accel..
A violin string vibrates at 294 Hz whenunfingered. At what frequency will it vibrate if it is fingeredone third of the way down from the end
Three silver wires of equal length are connected in series with a1.50 V battery. Their cross-sectional areas are 1.00, 5.00 and10.0 cm2. (a) What is the potential difference across the narrowest wire? (b) The medium wire? (c) The widest wire?
A 140 kg astronaut (including space suit) acquires a speed of2.50 m/s by pushing off with his legs from an 1800 kg space capsule. What is the change in speed of the space capsule
question a diver pushes off horizontally from the top of a vertical cliff that is 40.0 m high from water surface below.
A car of mass 1500 kg rounds a circular turn of radius 20m. how fast can the car travel without skidding
How does any elementary particle interact with the EM-Force to get an electric charge? What interactions do they have with photons?
an rl circuit in which the inductance is l 4.00 h and the resistance is r 5.00 omegacap.gif is connected to a 21.0 v
An airplane propeller is rotating at 1250rpm. Compute the propeller's angular velocity
A 10 cm radius air duct is usedto replenish the air of a room 9.4 m5.0 m 5.0 m every 10 min. How fast does air flow in the duct
Two hockey players are traveling at velocities of v1 = 11 m/s and v2 = -20 m/s when they undergo a head-on collision. What is the mass of the other player
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