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The negative pion is an unstable particle with an average lifetime of 2.1 x 10-8 s (measured in the rest frame of the pion) If the pion is made to travel at very high speed relative to a laboratory, its average lifetime is measured in the laboratory to be 4.50 × 107 s. Obtain the speed of the pion expressed as a fraction of c. Find what distance, as measured in the laboratory, does the pion travel during its average lifetime?
Giancoli, page 30 --when they say that x-xo increases with the square of the initial speed. Why do they say square of initial speed only, what about square of final speed? And why do they ignore that the distance also decreases by a factor of 2.
force acting on a particle moving in the xy plane is given by 2yi x2 j where is in newtons and x and y are in
A ring of radius R has uniform charge per unit lenght ? C/m (?>0), and z is the dince along its axis. Explain why the electric field must be zero at the center of the ring
Light of wavelength 56 ionizes a hydrogen atom that was originally in its ground state. What is the kinetic energy of the ejected electron
A spider hangs from a strand of silk whose radius is5.8x10-6 m.The density of the silk is 1100 kg/m3.When the spider moves, waves travel along the strand of silk at aspeed of 310 m/s. Determine the mass of the spider.
question on a windy day a leaf is blown from 5m high central branch tree. as soon as it leaves the branch it is blown
A 10 kilogram crate is sliding at a constant speed of 7 m/s along a frictionless horizontal table, when it encounters a friction patch (μs=0.7, μk=0.4). Obtain the speed of the crate after sliding this distance
Here is the data found: This is OHM'S LAW experiment Trial Voltage Current Resistance, What is the uncertainty of this measurement
A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere, What is the direction of the field
A thin uniform rod is rotating at an angular velocity of9.0 rad/s regarding an axis that is perpendicular to the rod at its center. As the drawing indicates, the rod is hinged at two places, one-quarter of the length from each end.
A 2 kg ball is thrown straight up in the air. What is the net force acting on the ball when it reaches its maximum height?
The friction force in the sled is 1000N and the angle between the two ropes is 20 degrees. Explain how hard must each player pull to drag the coach at a steady 2.0 m/s?
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