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In 1995 a research group led by Eric Cornell and Carl Wiemann at the University of Colorado successfully cooled Rubidium atoms to the 20-200 nK temperature range. Assuming (incorrectly) that the Rubidium atoms behave like particles of a classical ideal gas, calculate the RMS speed of a Rubidium atom at a temperature of 64 nK. (In the experiments one particular isotope of Rubidium was used, Rubidium-87. The molar mass of this isotope is 86.91 g/mol.)
What is the speed of the two carts at the moment while their speeds are equal.
An undersea research chamber for aquanauts is spherical with an external diameter of 4.7 m. calculate the buoyant force on the chamber
An electric dipole consists of charges +2e and -2e separated by 0.78nm. It is in an electric field of strength 3.4 x 106 N/C. Calculate the magnitude of the torque on the dipole
A converging lens has a focal length of f = 27 cm. An object is placed 37 cm from the lens. Find the size of the image
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 5.45 m/s2. If the car's initial speed is 33 m/s, how long does it takes to stop and how far does it travel, starting ..
On a spacecraft, two engines are turned on for 658 s at a moment when the velocity of the craft has x and y components of velocity v0x = 4115 m/s and v0y =5135 m/s, Find the x and ycomponents of the craft's acceleration
A 3.9kg ball with a velocity of 3.2m/s in the +x-direction collides head-on elastically with a stationary 1.5kg ball. What is the speed of the first ball after the collision
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
what is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph
A block of mass m = 4.43 kg is attached to a spring which is resting on a horizontal frictionless table. What is the maximum speed of the block
A 125-turn circular coil of radius 2.75 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Find the magnitude of the average EMF
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