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The magnitude of the dipole moment associated with an atom ofiron in an iron bar is 2.1X10-23 J/T. Assume that allthe atoms in the bar, which is 4.7 cm long with a cross sectionalarea of 1.1 cm2, have their dipole moments aligned.
a) What is the dipole moment of the bar?
b) What torque must beexerted to hold this magnet perpendicular to an external field ofmagnitude 1.5 T? (The density of iron is 7.9 g/cm3)
A child sit down in a seat on a Ferris wheel. Suppose the wheel has a radius of 70m, and that when the ride begins, what angle has the child rotated through
A GaAs quantum well structure is given where a thin GaAs layer is embedded between AlGaAs layers. Assuming the we can treat the electrons in the GaAs conduction band as being trapped in a 1-D potential well in the x direction,
A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. What force does the seat exert on you
The intensity of sunlight at the top of the earth's atmosphereis about 1390 W/m2.The distance between the sun and earth is 1.50 x 1011m, What is the intensity of sunlight that reaches the probe
A 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s "burn." what impulse is experienced by the rocket sled
finding the thermal conductivity (k) of a box with total surface area of 1.20 m and a wall thickness of 4cm is made of an insulating material. a 10 W electric heater inside the box maintain the inside temp. at 15 C above the outside temp.
A bottle has a mass of 31.00g when empty and 97.94g when filled with water. what is the specific gravity of the other fluid
In the bohr theory of the hydrogen atom an electron moves in acircular orbit about a proton. the radius of the orbit is0.53x10^-10m. find the electrostatic force acting on each particle
Two carts on a frictionless air track are made to travel toward each other. As they collide they stick together. if the cart on the left has a mass of 250 grams and is moving at 0.2 meters per second to the right.
a room measures 50x3020. the dilution volume flow rate is 3000 cfm. at 800 am the concentration of a contaminant is 50
Calculate this temperature.
A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by F= (12.0 - 3.00t^2)i, with F in newtons and t in seconds, and it acts until its mag..
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