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Rubidium atoms have been cooled (using laser techniques) and trapped in a magnetic "bottle" in order to observe Bose Einstein Condensation (Nobel Prize 2001).
Suppose the cloud of atoms is cooled to one micro-Kelvin. Calculate the root mean square speed of the rubidium atoms. [The atoms are at such low density that they remain in a (metastable) gas phase].
question1in the cooper and shepard experiment 1973 participants were asked to choose whether a stimulus a letter was
A rotational axis is directed perpendicular to the plane of a square and is located . Two forces, 1 and 2, are applied to diagonally opposite corners, and act togther the sides of the square, first as shown in part a and then as shown in part b of..
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 14.0cm, Find the electric field just inside the paint layer
Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. Many rotate very rapidly. Suppose that the mass of a certain spherical neutron star is 1.9 times the mass of the Sun and its radius is 20.9 km.
Horse races once around a circular track in a time of 176 s, with a speed of 26 m/s. What is the radius of the track.
A dipole is centered at the origin and has charges q and -q located at z=l/2 and z=-l/2, respectively. Find the electric field at position r along the z axis and also at position r along the x-axis
A log of mass 40 kg is dropped into river at 0°C. If the relative density of the log is 0.8, what will be the volume of the log above the surface
A swimming duck paddles the water with its feet once every 1.6s, producing surface waves with this period. How far apart are the crests behind the duck
A 1000kg truck is driving up a 10 degree slope. A 10g ornament hangs by a massless string from the rear-view mirror in truck.
A solenoid is wound with 970 turns on a foam core 4.0 cm in diameter and 50 cm long. Calculate the induced emf that this coil produces
The highest string on a guitar has a vibrating length of 60 cm and a vibrating mass of 0.9 g. What is the wavelength of the waves on the string
A tungsten wire has a radius of 0.086 mm and is heated from 20.0 to 1422 oC. The temperature coefficient of resistivity is ? = 4.5, How long is the wire
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