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A uniform, solid metal disk of mass 6.50kg and diameter 24.0 cmhangs in a horizontal plane, supported at its center by a verticalmetal wire. You find that it requires a horizontal force of 4.23 Ntangent to the rim of the disk to turn it by 3.34 degrees thustwisting the wire. You remove this force and release the diskfrom rest. a) what is the torsion constant for the metal wire?
The Space Shuttle travels at a speed of about 7.60 103 m/s. The blink of an astronaut's eye lasts about 110 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?
In redesigning a parallel-plate capacitor with circular plates, you triple both the diameter of the plates and their separation. what is the capacitance of the redesigned capacitor
15 O and 131 I are isotopes used in medical imaging 15 O is a beta-plus emitter, 131 I a beta-minus emitter. What are the daughter nuclei of the two decays?
An airplane is flying due north at 180 m/s. The Earth's magnetic field has a northward component of 0.3 mT and an upward component of 0.46 mT. what is the motional emf between the wingtips
There is also blue light which has a transmitted angle in the water that is 0.56 degrees smaller than that of the red light in the water. What is the incident angle of blue light
An object is placed 30 cm from a converging lens forms an image 40 cm from the lens. is the image which is formed real or virtual
In 0.675 s, a 6.80-kg block is pulled through a distance of 4.10 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
A fireworks rocket explodes at a height of 100 m above the ground. What is the total sound energy of the explosion
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
a heavy flywheel rotating on its central axis is slowing down because of friction in its bearings. find its rotational speed at the end of the second minute
A 500 kg polar bear of average density 950 kg/m3 is stranded on a melting chunk of ice in the ocean. What is the smallest volume of ice that will keep the bear entirely above water
observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central
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