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A silicon sample is doped with phosphorus at 1.23 parts per million. Phosphorus acts as an electron donor, providing one free electron per atom. The density of silicon is 2.33 g/cubed cm and its atomic mass is 28.09 g/mol. Calculate the number of free electrons per unit volume of the doped silicon.
Compare the above result with the no. of conduction electrons per unit volume of copper wire, assuming that each copper atom produces one free conduction electron. The density of copper is 8.96 g/cm^3 and it's atomic mass is 63.54 g/mol.
what slit separation required to desired interference patten.
when jim abd rob ride bicycles, jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If rob takes 5.7 minutes to react the top, how much earlier s..
A projectile is fired at an upward angle of 50° from the top of a 145m cliff with a speed of 195 m/s. What will be its speed while it strikes the ground below? (Use conservation of energy.)
Find the electric field at the position of the electron. What is the potential difference in volts between the plates.
The clarinet is well modeled as a cylindrical pipe that is open at one end and closed at the other. Find the wavelength and frequency of the third normal mode of vibration
Illustrate the force vectors with their tails at the origin of coordinate system. The orientation of your vectors will be graded. The exact lengths of your vectors will not be graded but relative length of one to the other will be graded.
Find out the velocity of the plane relative to the earth.
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hyper gravity") on test pilots and astronauts. In this device, an arm 8.84 {rm m} long rotates about one end in a horizontal plane..
Illustrate what is the velocity of the second block after the bullet imbeds itself? (b) Find the ratio of the total kinetic energy after the collision to that before the collision.
A hiker's trip consists of three segments. Path A is 8-km long heading 60.0 degrees north of east. Path B is 7.0 km long in a direction due east. Path C is 4sa-km long heading 315 degrees counter clockwise from east. Graphically add hiker's displa..
Monochromatic light from a distant source is incident on a slit 0.750 {rm mm} wide. On a screen 2.00 {rm m} away, the distance from the central maximum of the diffraction pattern to the first least amount is measured to be 1.35 {rm mm}.
An airplane is flying with a velocity of 93.0 m/s at an angle of 25.0 degrees above the horizontal, How far from the dog will the suitcase land in m
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