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A wooden raft has a mass of 55 kg. When empty it floats in water (1000kg/m3) with 64% of its volume submerged. What mass of sand can be put on the raft without it sinking?
two disks are mounted on frictionless bearings on the same axle and can be brought together so that they couple and
A tall tree is growing across a river from you. You would like to know the distance between yourself and the tree,as well as its height, How far away is the tree?
in a series r-l circuit r0.125 ohms l500 microhenrys and the batterys emf is 0.750 v.a what is the energy stored in the
A proton is placed in an electric field of intensity 700 N/C. What is magnitude and direction (towards or away from the field) of the acceleration of this proton because of this field? The charge on a proton is +1.6 x 10-19 C and the mass of a prot..
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.25 103 N, Find the instantaneous acceleration of the puck
Scientists want to place a 3800.0 kg satellite in orbit around Mars. They plan to have the satellite orbit at a speed of 2462.0 m/s in a perfectly circular orbit. What is the acceleration of the satellite in orbit
The drawing shows a copper wire (negligible resistance) bentinto a circular shape with a radius of 0.48 m. The radial sectionBC is fixed in place, while the copper bar ACsweeps around at an angular speed of 16 rad/s.
A scuba diver and her gear displace a volume of 70.0L and have a total mass of 73.1kg. What is the buoyant force on the diver in sea water
A sailor strikes the side of his ship just below the waterline. Hehears the echo of the sound reflected from the ocean floor directlybelow 1.87 s later. How deep is the ocean at this point?
an electrically neutral model airplane is flying in a horizontal circle on a 2.0-m guideline which is nearly parallel
A skier starts from rest at the top of a hill that is inclined at9.5°with the horizontal. The hillside is 150 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of..
two stones are thrown simultaneously one straight upward from the base of a cliff and the other straight downward from
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