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A Texas cockroach of mass 0.123 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has a radius 16.6 cm, rotational inertia 6.93 x 10-3 kg·m2, and frictionless bearings. The cockroach's speed (relative to the ground) is 2.63 m/s, and the lazy Susan turns clockwise with angular velocity ?0 = 3.43 rad/s. The cockroach finds a bread crumb on the rim and, of course, stops. What is the angular speed of the lazy Susan after the cockroach stops?
A chair of weight 135 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38 directed at an angle of 42 below the horizontal and the chair slides along the floor.
A heat engine does 798.57 J of work per cycle while exhausting 163.83 J of waste heat. What is the engine's thermal efficiency in percent
You observe that a solid cube of some material floats on the surface of an oil puddle at a service station with 68.5% of its volume submerged
35MW of power at 45kV (rms) arrives at a town from a generator via 5.0? transmission lines. Calculate the emf at the generator end of the lines
Two scales on a voltmeter measure voltages up to 20.0 V and 28.0 V, respectively. Determine the coil resistance
A helicopter is ascending vertically with a speed of 5.45m/s. At a height of 141m above the Earth, a package is dropped from a window. How much time does it take for package to reach the ground.
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.40×106N , What is the total work done by the two tugboats on the supertanker
A truck is traveling at 11.4 m/s down a hill when the brakes on all four wheels lock. How far does the truck skid before coming to a stop
The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile. Find out the maximum altitude reached by the rocket.
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length (include sign if negative)? (b) How tall is the pencil's ..
A 70.0 kg person balances a 1250 kg elephant which is standing on a circular lift of diameter 2.00 m. What is the diameter of the piston
A 1.9-kilogram mud ball drops from rest at a height of 18 m. If the impact between the ball and the ground lasts 0.56s, Find the final velocity of the 4.90-kg ball if the collision is elastic
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