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A 129-kg horizontal platform is a uniform disk of radius 1.57 m and can rotate about the vertical axis through its center. A 69.5-kg person stands on the platform at a distance of 1.01 m from the center and a 25.9-kg dog sits on the platform near the person, 1.39 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
Find the angles of the first three principal maxima above the central fringe when this grating is illuminated with 617 nm light. answer in degrees.
You irradiate some tumor cells with X rays in a pure nitrogen atmosphere and you find that 10% of the cells survive a dose of 8 Gy. In air 90% of these cells die after 3 Gy of X rays. What is the Oxygen Enhancement Ratio for these cells?
The small skydiver, weighing 50N, sinks 1.0m into the snow when her parachute does not open, Determine the work done by the snow in stopping the person
A 1420 kg car traveling east at 13.6 m/s has a head-on collision with a 1980 kg car traveling west at 20.5 m/s. If the collision time is 0.10 s, what is the magnitude of the force needed to restrain a 69 kg person in the smaller car?
The Space Shuttle travels at a speed of about 7.23E+3 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?
A pond with a flat bottom has a surface area of 730 m2 and a depth of 2.7 m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the pond
A sled, initially at height h is sliding down an incline and then it continues moving on the horizontal plane until it stops. What's the energy required to drag it back up?
The total charge that anautomobile battery can supply without being recharged is given interms of Ampere-hours. A typical 12-V battery has a rating of 77 A· h . Suppose you forget to turn off the headlights in yourparked automobile.
a large capacitance of 2.00 mf is needed for a certain application.a calculate the area the parallel plates of such a
A neutron in a nuclear reactor makes an elastic, head-on collision with the nucleus of a carbon atom initially at rest. What fraction of the neutron's kinetic energy is transferred to the carbon nucleus
question what must be the radius of a circular loop of wire so the magnetic field at its center is 1.40 10-4 t when the
Find out the gravitational potential energy
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