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The cable of a hoist has a cross-section of 80 mm2. The hoist is used to lift a crate weighing 500 kg. What is the stress in the cable? The free length of the cable is 3m. How much will it extend if it is made of steel (modulus 200 GPa)? How much if it is made of polypropylene, PP (modulus 1.2 GPa)?
A Van de Graaff accelerator is essentially a parallel plate capacitor. Such a machine is changed by an electrical potential of 2.5 x 10^6 volts. What is the energy density stored in the field
A particle contains the quark combination: u b, What is the charge of the particle and What is the baryon number of the particle
A 5.5 %u03BCC point charge is placed in an external uniform electric field that has a magnitude of 68000 N/C
At rest a person has a metabolic rate of 4.2 x 10^5 J/hr. The person is submerged neck-deep into a tub containing 1.0 x 10^3 kg water at 27.00 degrees Celcius. what is the water's temperature after a half hour
A 0.11-kg rubber ball is dropped onto a table. The speed of the ball right before it hits the table is 5.9 m/s. what is the magnitude of the average force exerted on the ball by the table
question1a student has two ramps both of that are at an angle 25deg. ramp 1 is frictionless and ramp 2 has friction.
A pot with a steel bottom 7.95 mm thick rests on a hot stove. The area of the bottom of the pot is 0.170 m2. The water inside the pot is 100.0°C at and 0.490 kg are evaporated every 3.00 min.
A horizontal ray of light falls on a vertical plane mirror free to turn about the horizontal axis. If the mirror turns through 20o, by what angle does the reflected ray turn.
bowler uses a 5-kg bowling ball. What is the weight of the bowling ball, What is the momentum of the ball
A student hits the cork sharply with her fist and the bottom of the bottle breaks. The student's fist has a mass of m = 0.480kg and moves downward at a speed of vi = 5.00m/s. What is the force that the fist exerts on the top of the bottle
Two isolated conducting spheres of equal radius R have charges +Q and -Q, respectively. Estimate the capacitance of this unusual capacitor
A 3.5 m long, 310 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70 kg construction worker stands at the far end of the beam.
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