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A layer of oil with density 800 kg/m^3 floats on top of a volume of water with density 1,000 kg/m^3. A block floats at the oil-water interface with 1/4 of its volume in oil and 3/4 of its volume in water. What is the density of the block?
In a rectangular coordinate system a positive point charge q = 6.00 * 10^-9 C is placed at the point x = +0.150m , y = 0, Find the magnitude of the electric field at the origin
What is the minimum rate of rotation, in revolutions per minute, required for the spheres to contact the cylinder wall
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=59600 N. What is the magnitude of the lift force
A jewelry maker has asked your glass studio to produce a sheet of dichroic glass that will appear red for transmitted light, how thick should the coating be
the vehicle is used to transport supplies to and from the bottom of the 25-present grade. each pair of wheels one at a
A beaker of water rests on an electronic balance that reads 999.0 g. A 2.4 cm-diameter solid copper ball attached to a string is submerged in the water, What is the new balance reading
A 53.0 kg stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. What is the apparent weight of the pilot at the lowest point of the pullout
A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.21 m and a mass of 0.005 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor.
A heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. What is the temperature of the hot reservoir
Gas is confined in a tank at a pressure of 11.3 atm and a temperature of 22.5°C. what is the pressure of the gas remaining in the tank
Suppose you aim to suspend in air a perfectly reflecting 4cmx4cm surface, with mass m = 0.00045kg. What intensity of light must you shine on it
A solid ball of mass .30kg and radius .053m is rolling without slipping along a horizontal surface with a linear speed of 2.3m/s. obtain is its total Kinetic energy
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