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A block of mass 0.78 kg is suspended by a string which is wrapped so that it is at a radius of 0.069 m from the center of a pulley. The moment of inertia of the pulley is 3.90×10-3 kg·m2. There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.79 m, is 1.964 m/s. Calculate the amount of energy dissipated up to that point.
A long straight wire carries a current that is increasing at the rate of one ampere per microsecond. find In which direction will current flow in each loop
You have a compound microscope with a barrel of length 163 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
A 12 kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 16 kg package on the ground, What is the magnitude of the least acceleration the monkey must have if it is to lift the package off the ground
A 220g ball is thrown horizontally at 19.2m/s, As it falls under the influence of gravity, find its final momentum (magnitude) after 1.00s.
A particle leaves the origin with an initial velocity v(bold)=2.4m/s xhat, How far does the particle move in the x direction before it turns around
An 63 kg weight watcher wishes to climb a mountain to work o? the equivalent of a large piece of chocolate cake rated at 690 kcal (1 kcal = 1000 cal). How high must the person climb
A 110 turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1700 rev/min, Calculate the maximum emf induced in the coil by the Earth's field
Carbon-14 has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of Carbon-14 is 5730 years. how old is the material
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
At the beginning of a dive, a diver is in the layout position with an angular velocity of 100°/s and a moment of inertia of 15 kg·m2. What is the diver's moment of inertia in the tuck position
Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. What is the centripetal acceleration needed to rotate the hammer
An athlete executing a long jump leaves the ground at a 20° angle and travels 6.30 m. how much longer would the jump be
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