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A rod of proper length L moves past you a speed v. You reach out and grab the back end of the rod, bringing that point instantly to rest in your frame of reference. Assuming that this information, that the back of the rod has stopped, travels toward the front of the rod at the speed of light (it actually travels at the speed of sound), (a) show that for any v > a the length of the rod always extends beyond the proper length Lp before the front of the rod comes to rest and the rod assumes its proper length.
When a horizontal force of 300 Newton is applied to a 68.0 kilogram box, the box slides on a level floor, Estimate the magnitude of the acceleration of the box
Two skiers, one of mass m and the other 2m, start at the top of a mountain. The more daring skier (2m) takes the double black diamond trail to arrive at the bottom more quickly, while the other skier meanders back and forth on a green beginner tra..
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
An oil drop carries one excess electron and weighs 9.3 x10-15 N. What electric field strength is needed to suspend the drop so it is motionless.
An Atwood machine consists of two masses, = 7.1 and = 8.7 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.70 .Determine the magnitude of the acceleration of..
A weightlifter stands up at constant speed from a squatting position while holding a heavy barbell across his shoulders, Draw a free-body diagram for the weight lifter
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km, What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity
42 g firecracker at rest at the origin when it explodes into three pieces the first with mass 12 g moves along the x
A camera's flash uses the energy stored in a 270µF capacitor charged to 170V. The current in the charging circuit is not to exceed 23mA. What's the resistance in the charging circuit
The electric field 5.90 from a very long charged wire is ( 2300 ,toward the wire).What is the charge (in nC) on a 1 cm-long segment of the wire.
An air-filled parallel-plate capacitor has plates of area 2.90 cm2 separated by 2.50 mm. The capacitor is connected to a 6.0-V battery. find the magnitude of the uniform electric field between the plates
four charges are placed at the corners of a square of side 4 cm. What is the electrostatic potential energy of this system relative to infinity
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