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A thin spherical shell of mass 0.450 kilogram and diameter 0.230 meter is filled with alcohol (ρ = 806 kg/m3). It is then released from rest at the bottom of a pool of water. Evaluate the acceleration of the alcohol-filled shell as it starts to rise toward the surface of the water.
An airplane with a speed of 40 m/s isclimbing upward at an angle of 52°with respect to the horizontal. When the plane's altitude is840 m, the pilot releases a package. Calculate the distance along the ground,measured from a point directly beneath ..
a recording engineer works in a soundproof room that is 44.0 db quieter than the outside. if the sound intensity in the room is 1.20 x 10^-10 w/m^2, what is the intensity outside
a light spring with spring constant 1300 nm hangs from an elevated support. from its lower end hangs a second light
Two people carry a heavy electric motor by placing it on a light board 2.90m long. One person lifts at one end with a force of 370N, What is the weight of the motor
In the figure above the mass to the spring is 0.2 kg. The spring's constant is 60 N/m. The mass is stretched to a position of 0.5 m and released. What is the work done by the spring
A baseball (m = 145 g) approaches a bat horizontally ata speed of 40.9 m/s (91.5 mi/h) and is hit straight back at a speedof 51.7 m/s (116 mi/h). If the ball is in contact with the bat fora time of 1.44 ms, what is the average force exerted on the..
An isolated conductor of arbitrary shape has a net charge of +1.10×10-5 C. Inside the conductor is a cavity within which is a point charge q = +4.40×10-6 C. obtain the charge on the outer surface of the conductor
Why do power companies use low currents in power lines when transferring electrical energy over large distances? Because power lines have resistance and resistors transform electrical energy into thermal energy. High currents would require larger p..
a a 171g sample of carbon from ancient wood is found to have an activity of 155.6 decaysmin. how many half lives have
An old fashion record is spinning freely at 78 rpm (revolutions per minute) when another record is dropped (lightly) vertically on it. Now there are two records turning together at 39 rpm, because a. rotational energy is conserved b. vertical motion ..
Calculate the electric force that exists between two objects that are 0.500m apart and carry charges of 0.00450C and 0.00240C. Is this force attractive or repulsive
A cubical block of wood, 10.0 cm on a side, floats at the interfacebetween oil and water with its lower surface 1.50 cm below theinterface (see the cross section view in the figure). The densityof the oil is 790 kg/m3. (a) What is the gauge pressure ..
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