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Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force.
Two 32.4-cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. How far does the other end of the system of rods move
A magnifying glass uses a converging lens with a focal length of 14.5 cm. It produces a virtual, How far is the object from the lens
An aluminum wire carrying a current of 6.0 A has a cross-sectional area of 9.0 10-6 m2. Find the drift speed of the electrons in the wire
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
a girl of mass 40 kg is in a rocket ship an altidude of 35 km above the surface of the earth. Find the gravitational force on the girl by the earth
A beam of light is incident on a plane mirror at an angle of 32 degrees relative to the normal. What is the angle between the reflected rays and the surface of the mirror?
Please address the 2-D/3-D cases for the particle in a finite box of infinite depth. What are the eigenfunctions and eigenvalues now
Michael Phelps won a gold medal at the 2008 Beijiing olympics by swimming the 200 meter medley in 1:54:80. On an off-day Mike swims the medley in 1:58:32. What is the speed in mph? (Give the ans. to two decimal places)
A cubical box .2 m on a side is completely immersed in a fluid. The pressure at the top of the box is 105 kPA, What is the denstiy of the fluid
A parallel-plate capacitor in air has a plate separation of 1.35 cm and a plate area of 25.0 cm2. Determine the charge on the plates before and after immersion
An object is thrown vertically upward and has a speed of 20.0 m/s when it reaches two thirds of its maximum height above the launch point, determine The velocity of the object at maximum height
Oppositely charged parallel plates are separated by 5.26 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field strength between the plates?
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