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A 45 kg figure skater is spinning on the toes of her skates at1.0 rev/s. Her arms are outstretched as far as they willgo. In this orientation, the skater can be modeled as acylindrical torso (40 kg, 20 cm average diameter, 160 cm tall) plustwo rod-like arms (2.5 kg each, 66 cm long) attached to the outsideof the torso. The skater then raises her arms straight aboveher head, where she appears to be a 45 kg, 20 cm diameter,200-cm-tall cylinder.What is her new rotation frequency, in revolutions persecond?
What is the height of the power line and the initial speed of the ball?
a proton with a speed of 2.0 x105 ms falls through a potential difference v annd thereby increases its speed to 4.0
A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.9 cm and a diameter of 0.23 mm. The wire is stretched 0.1 mm. Young's modulus for stainless steel is 1.80E+11 Pa. What is ..
A positively charged particle of mass 7.21E-8 kg is traveling due east with a speed of 85.3 m/s and enters a 0.340 T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 2.30E-3 s, at which time it leaves the fie..
Estimate approximately the angular deflection of the muon's trajectory, given that the rest mass of muon is 100Mev and that the saturation magnetization in iron is equivalent to 1.6 x 10^23 electron moments per cm^3.
Given that the goal is to allow all vehicles to come safely to a stop before reaching the intersection, calculate the maximum desired speed limit
what uniform magnetic field applied perpendicular to a beam of electrons moving at 3.59 x 106 ms is required to make
The electric field strength is 4.80×10^4 V/m inside a parallel-plate capacitor with a 2.5 mm spacing. find the proton's speed when it reaches the negative plate
Male Rana catesbeiana bullfrogs are known for their loud mating call. The call is emitted not by the frog's mouth but by its eardrums, which lie on the surface of the head. what is the amplitude of the eardrum's oscillation
a passenger on a stopped bus notices that rain is falling vertically just outside the window. when the bus moves with
The following objects are released simultaneously from rest at the top of a 1.50m long ramp inclined at 3.50? to the horizontal: Which wins the race
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. What is the refractive power of a magnifying glass
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