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A 0.48-kg piece of wood floats in water but is found to sink in alcohol (SG = 0.79), in which it has an apparent mass of 0.047 kg. What is the SG of the wood?
At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom scale. Find the maximum downward acceleration experienced by the crewman
suppose that we could use the energy released when 5 g of antimatter annihilates 5g of matter to lift a mass 3 km from the Earth's surface. how much mass can we lift? answer in unites of kg.
The needle of a sewing machine moves up and down in the same hermonic motion its driving force comes from a rotating wheel that is powered by an electric motor. how do you imagine that theup-and-down needle comapres with the period of the rotating..
A 3.500 kg puppet oscillates at the end of a light spring of constant k = 8.00 N/m. What is the frequency of the oscillations
A 20.0 kg wagon is being pulled over a level driveway by a horizontally directed pulling force of 140 N. If there is a 100 N friction force opposing its motion, What is the forward acceleration of the wagon
Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge, Find the angle of the wedge
The electric field strength just outside the outer conductor of a coaxial cable of outer radius of 0.2cm is E=7200N/C directed inward. find the initial surface charge density of the outer conductor
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.14 106 m/s. Find the magnitude of the acceleration of the proton
Consider an electron in a hydrogen atom, which is 0.050 nm from the proton in the nucleus, What electric field does the electron experience
The magnetic field in a solenoid is B = (µ0NI) / d. A circular wire of radius 10 cm is concentric with a solenoid of radius 7 cm, What is the non-Coulomb electric field in the wire
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. What is the amplitude A of each wave
A closed Gaussian surface in the shape of a cube of edge length 2.50 m. It lies in a region where the nonuniform electric field is given by = (3.35x + 4.36) + 6.10 + 7.19N/C
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