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German physicist Werner Heisenberg related the uncertainity of an object's position (triangle x) to the uncertainity in its velocity (triangle v). (trainagle x) is greater than or equal to h/(4pim(traingle v) where h is Planck's constant and m is the mass of the object. The mass of the electron is 9.11*10^-31 kg. What is the uncertainity in the position of an electron moving at 2.00/10^6 m/s with an uncertainity of (traingle v)= 0.01*10^6 m/s?
atnbsptnbsp 0 the current to a dc electric motor is reversed resulting in an angular displacement of the motor shaft
A factory worker pushes a 30.2kg crate a distance of 5.0m along a level floor at constant velocity by pushing downward at an angle of 30? below the horizontal. What is the total work done on the crate
Ted is sitting in his lawn chair when Stella flies directly overhead, going southeast at 100 m/s. find the coordinates of the explosion in Stella's reference frame
A 38.8-kg boy, riding a 2.27-kg skateboard at a velocity of +5.22 m/s across a level sidewalk, jumps forward to leap over a wall. What is the skateboard's velocity relative to the sidewalk
A bicyclist traveling with speed v= 4.2 m/s on a flat road ismaking a turn with a radius r =6.4m. If the coefficient of static friction between tiresand road is 0.70, what is the minimum turning radius
A curve of radius 50 m is banked for the design speed of 100 km/h. If the coefficient of static friction is 0.60 (wet pavement), at what range of speeds can a car safely create the curve.
A 19-cm-long, 210g rod is pivoted at one end. find the period if the rod and clay swing as a pendulum
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. What is the final angular speed of the merry-go-round
A quarterback throws a pass that is a perfect spiral. In otherwords, the football does not wobble, but spins smoothly about anaxis passing through each end of the ball. how many revolutions has the ball made while in the air
a velocity selector is used in a mass spectrometer to produce a beam of charged particles with uniform velocity.suppose
A light wave has a 670{\rm nm} wavelength in air. Its wavelength in a transparent solid is 420{\rm nm}. What is the light's frequency in the solid
A parachutist bails out and freely falls 61 m. Then the parachute opens, and thereafter she decelerates at 2.3 m/s2. How long is the parachutist in the air
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