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Attached to each end of a thin steel rod of length 1.20 m and mass6.40 kg is a small ball of mass 1.06 kg. The rod is constrained torotate in a horizontal plane about a vertical axis through itsmidpoint. At a certain instant, it is rotating at 39.0 rev/s.Because of friction, it slows to a stop in 32.0 s. Assuming aconstant retarding torque due to friction, compute
(a) the angular acceleration,
(b) the retarding torque,
(c) the total energytransferred from mechanical energy to thermal energy by friction,and
(d) the number of revolutions rotated duringthe 32.0 s.
An electric field of 8.60 x 107 V/m is desired between two parallel plates, each of area 35.0 cm2 and separated by 2.45 mm of air. What charge must be on each plate.
A soccer ball is kicked with an initial horizontal velocity of 16.0 m/s and an initial vertical velocity of 18.0 m/s. How far from where it was kicked will the ball land
a troop of girl scouts is camping in the snow. as it is cold outside they decide they dont want to go to the lake to
Vector B has magnitude of 8.0 at an angle of -10.0 o from the x-axis. Let C=A+B. Let D=A-B. Let V=2*A-B. What is the x-component of vector C. What is the y-component of vector C.
An exoplanet of mass 7.4e26 kg orbits its parent star at an angle of inclination of 28.9 degrees. determine the period of the exoplanet in days
A large piece of cork weighs 0.295 N in air, he spring scale reads 0.903 N. Find the density of the cork
A toy rocket, of mass 60 g, achieves a velocity of 80 m/s after3.0 s when fired straight up. What average force does the rocketengine exert?
A jogger takes 49 minutes to run 22 times around a track that measures 0.25 mile. What is her average velocity in mph and m/s
What is order of the layers from top to bottom
At a distance r away from a point charge q, the electric potential is V = 600 V and the magnitude of the electric field is E = 200 N/C
A relatively loud sound can be created because a standing wave occurs in the bottle. Explain why the pitch of the sound becomes higher
A piece of balsa wood of 0.3 g/cm3 is released after being completely submerged underwater. What is the magnitude of the initial acceleration of the wood
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