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A 58-kg ice-skater moving at 7.5m/s glides to a stop. Assuming the ice is at 0 degrees Celsius and that 50% of the heat generated with friction is absorbed by the ice, how much ice melts?
The starter motor of a car engine draws an electric current of 27.0 A from the battery. The copper wire to the motor is 5.90 mm in diameter and 1.22 m long. What is the current density in the wire
in this assignment you will apply key concepts covered in the module readings. you will identify the component parts
A student is looking at a monochromatic light source and is looking for the third bright fringe. At what angle should the student look for the third bright fringe
A 0.15 kg baseball collides with a 1.0kg bat. The ball has a velocity of 40 m/s immediately prior to the collision. Estimate how fast the baseball is moving as it leaves the bat following the collision
on a hot summer day a young girl swings on a rope above the local swimming hole. when she lets go of the rope her
The electron is heading at a 45 angle directly toward the wire when it is 50cm away; the electron reaches only as close as 1.0 cm, before being repelled away, always moving in the same plane. If the electron has an initail speed of 3.4 x 10^6 m/s,
A single loop of copper wire moves at an unknown constant speed v into a region of uniform magnetic field B = 5.00 T. Calculate the induced current in the copper wire loop
an electric heater is used to heat a room of volume 66 m3. air is brought into the room at 5degc and is completely
Suppose the space shuttle is in orbit 320km from the Earth's surface, and circles the Earth about once every90.9 minutes. Find the centripetal acceleration of the space shuttle in its orbit.
An electron and a 140-g baseball are each traveling 200m/s measured to an accuracy of 0.095%, Calculate the uncertainty in position of the baseball
An automobile batery has 12 V and an internal resistance of .05 ohms. The starter draws 40 amps of current when starting the car. The resistance of the starter is
A bowling ball 26 cm in diameter is slid down an alley with which it has a coefficient of sliding friction of µ = 0.55. The ball has an initial velocity of 9 m/s and no rotation. g = 9.81 m/s2. Note: For a sphere Icm = (2/5)mr2.
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