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A fireman tosses his 0.85-kg hat onto a peg, where it oscillates as a physical pendulum (see the figure below). If the center of mass of the hat is 8.2 cm from the pivot point, and its period of oscillation is 0.55 s, what is the moment of inertia of the hat about the pivot point?
kg · m2
A double convex lens has equal curvature radii of 35 cm. What is the refrative index of the lens
A 0.25 harmonic oscillator has a total oscillation energy of 9.9 J. If the oscillation amplitude is 20.0 cm, what is the oscillation frequency?
A "diving bell" is a tube or pipe that is closed at the top and open at the bottom. It is lowered into a body of water with the open end down so that air is trapped inside, Find the absolute pressure of the air in the bell
Four identical charges (+2.0 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A beaker of mass 325 g is sitting on a table. The beaker is filled with 210 g of water. The beaker and water are initially in thermal equilibrium at 22 ?C, What is the specific heat of the beaker
An object has a total energy of 5.60 × 1015 J and a kinetic energy of 1.40 × 1015 J. find the magnitude of the object's relativistic momentum
An air conditioner connected to a 129 V rms ac line is equivalent to a 17 capital omega resistance, What is the impedence of the air conditioner
The displacement of a wave traveling in the positive x-direction is y(x, t) = (3.5 cm)cos(1.7x - 129t), where x is in m and t is in s. What is the frequency of this wave
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotatio..
The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 361000 rpm. Calculate the angular acceleration produced by the drill
q1. on a very muddy football field a 110kg linebacker tackles an 85kg halfback. immediately before the collision
25% of a radioactive material stays active after 4 hours. What is the half-life of this radioactive material
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