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A man and a boy are carrying a uniform wooden beam that is 8 m long and weighs 900 N. The boy lifts at one end. At which distance from the boy does the man have to hold the beam so that he lifts twice the boy's load?
The dial on an FM radio contains numbers ranging from about 88 to about 108. What is the corresponding range of wavelengths
Which is larger for a uniform disk of mass M and radius R that is rolling without slipping: its translational or its rotational kinetic energy? A. It's translational kinetic energy B. It's rotational kinetic energy C. Both are the same D. Question ca..
The nucleus of Be (atomic mass=8) is an unstable isotope of beryllium, and decays into two alpha particles (helium nuclei) via the process 8Be "decays to" 4He+4He. Find the kinetic energy of each of the alpha particles
A cylinder with a diameter of 9 microns and a height of 40 microns is composed of Al2O3. Calculate the number of aluminum atoms and the number of oxygen atoms
A 1.23 kg mass stretches a vertical spring .215m . If the springis stretched an additional /130m and released, how long does ittake to reach the new equalibrium position?
A playground merry-go-round has a radius of 4.60 m and a moment of inertia of 240 kg*m^2 and turns with negligible friction about a vertical axle through its center. How much work did the child do on the merry-go-round
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. The student now starts moving the box up a 10.0° incline, what is the new acceleration of the box
A copper weight is placed on top of a 0.23 kg block of wood (density = 0.60 x10^3 kg/m3) floating in water. What is the mass of the copper
A dentist's drill starts from rest. After 3.53 s of constant angular acceleration it turns at a rate of 2.66E+4 revolutions per minute. Determine the angle through which the drill rotates
Find the drift velocity of conduction electrons in a gold wire of diameter 2.36 mm when a current of 0.375 A flows in it. The density of conduction electrons in gold is 5.90x10^28m^-3
An asteroid is seen in opposition from Earth once every 1000 days. What is the sidereal orbital period of the asteroid? What is the length of the semi major axis of the asteroids orbit?
Janet has a 40% interest in the S corporation. All expenses that reduce DPGR are from wages, and all wages paid relate to DPGR. Explain how much QPAI and wages are allocated to Janet?
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