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The bonding of silicon in solids and molecules is qualitatively the same as that of carbon. Silicon atomic states become molecular states and in a solid, these effectively form the valence and conduction bands. Which of silicones atomic states are relevant ones, and which molecular state corresponds to which band?
A 1.11 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.07 106 m. Find the resultant gravitational force on the mass
An 80 kg man is ice skating due north and happens to collide with a 20 kg boy who is skating due east. How fast was the boy moving right before the collision
A steady current, I flows through a wire of radius R. Find the magnetic field inside and outside the wire if a uniform current density, K=Ko(z-hat) flows on the surface of the wire, s = R , like in a superconductor.
A force of 725N accelerates a 325kg object, initially moving 7.50 m/s, What impulse was applied to the object
1400 kg car acelerates from 45mph (20.1 m/s) to 65mph (29.1m/s) over a distance of 440 m in 35 s. what is the network done on the car by all forces acting on it
A rifle with a mass of 1.76 kg fires a bullet with a mass of 5 g (0.005 kg). The bullet moves with a muzzle velocity of 401 m/s after the rifle is fired. what is the recoil velocity of the rifle
A 1.4cm tall object is 4.0cm from a concave mirror. Ifthe image is 4.0cm tall, how far is it from the mirror
A current of 7.37 A in a solenoid of length 14.8 cm creates a 0.369-T magnetic field at the center of the solenoid. How many turns does this solenoid contain
a an energetic photon of wavelength 5.1 nm scatters off an electron at rest at an angle of 63 degrees. what is the
A Firefighter of mass 80kg slides down a vertical pole with anacceleration of 5 m/s squared. What is the friction force that acts on the fire fighter
You need to connect a 43k\Omega resistor and one other resistor to a 110 \rm V power line. what should be the value of the unknown resistor
The nucleus of the hydrogen atom has a radius of about 1.1x10^-15 The electron is at a distance of about 5.29 Ã- 10-11 m from the nucleus. compute the volume of the atom
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