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1) a block of wood has specific gravity 0.79. When placed in water, what percent of the volume of the wood is under the surface. And what volume of the wood is above the surface?
2) Legend says that Archimedes, in determining whether or not the king%u2019s crown was made of pure gold, measured its volume by the water displacement method. If the density of gold is 19.3 g/cm^3, what volume would be necessary to prove that it is pure gold?
An air-filled parallel-plate capacitor has plates of area 2.20 cm2 separated by 2.00 mm. What is the charge on the capacitor
A parallel plate capacitor has plates of area A and seperation of d and is charged to a potential difference of V.Derive expressions for the new potential difference
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
acA block lies on a plane which is inclined at 22 deg to thehorizontal. The coefficient of kinetic friction between blockand plane is %u03BCk = 0.17. compute the acceleration of the block
A test charge of +2*10^-7 C is located 5cm to the right of a charge +1*10^-6 C and 10 cm to the left of a charge -1*10^-6 C. The three charges lie on a straight line
An object with a charge of 0.880 µC is placed at the center of a regular octahedron with 8 equivalent surfaces. What is the electric flux through one surface of the octahedron?
A person doing a chin-up weighs 655 N exclusive of the arms. During first 15 cm of the lift, each arm exerts an upward force of 355N on the torso. If the upward movement starts from rest, what is the person's velocity at this point.
A laser beam of unknown wavelength passes through a diffraction grating having 5590lines/cm , At what angle will the next pair of bright spots occur
Two large identical flat metal plates are placed parallel to one another, seperated by a small distance compared to their linear size. One plate is given a charge per unit area 1.80E-5 C/m2 and the other a charge per unit area -1.80E-5 C/m2. Using..
A typical ten-pound car wheel has a moment of inertia of about. The wheel rotates about the axle at a constant angular speed making 60 full revolutions in a time interval of 5.
A loudspeaker of mass 25 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.30.
An AC generator supplies an rms voltage of 230 V at 50.0 Hz. It is connected in series with a 0.650 H inductor, a 6.00 ?F capacitor, What is the peak voltage across the capacitor
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