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Birds resting on a high-voltage power lines are a common sight. A certain copper power line carries a current of 52.7 A, and its resistance per unit length is 1.15 x 10-5 /m. If a bird is standing on this line with its feet 4.0 cm apart, what is the potential difference across the bird's feet?
Two identical uniform poles of mass 50 kg and linear mass density 15 kg/m are supported by pivots 2 m apart on level ground. what angle do the poles make with the vertical
Consider the conical pendulum with an 80.0 kg bob on a 10.0 m wire making an angle of 5.00 with the vertical as shown. Determine (a) horizontal and vertical components of the force exerted by the wire on the pendulum and (b) radial acceleration of th..
A ball m=1kg rolling without slipping on a flat surface with v=.1m/s strikes the wall after which v=.08m/s. What is the amount of heat generated due to impact?
a child on a swing set swing back and forth if the length of the supporting cables for the swing is 2.1 m long, what's acceleration does to gravity or oscillation
A boy of mass 50 kg runs up a hill of vertical height 300 m in 20 minutes. calculate the work he does climbing the hill
a 5.0 kg block slides from rest down a frictionless slope, then enters a flat area where Uk is 0.50. What is the speed of the block at the base of the slope
Two men decide to use their cars to pull a truck stuck in mud. What is the net forward force exerted on the truck in the direction it is headed
A duck is floating on a lake with 30% of its volume beneath the water. What is the average density of the duck
A charged sphere of mass 2.5x10^-5 kg and net charge of 6.0x10^-9 C hangs from a silk thread, what is the magnitude of the charge dentist on each plate
A person is riding a bicycle, and its wheels have an angular velocity of 16.1 rad/s. What is the anguar acceleration (in rad/s2) of each wheel
If the current in the solenoid is ramped at a constant rate from zero to Is= 1.20 A over a time interval of 79.0 ms, What is the mutual inductance between the solenoid and the short coil
Calculate the longest wavelengths for light in the Balmer, Lyman, and Brackett series for hydrogen
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