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An electron in the beam of a typical television picture tube is accelerated through a potential difference of 20,000 V before it strikes the face of the tube. What is the speed of the electron? what is the eneregy of the electron in joules? what is the energy of the electron in electron volts?
Consider two masses (M=50 kg, m = 10 kg) connected by a string, Find the magnitude of frictional force acting on mass
A dentist uses a small mirror of radius 55 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 20 mm from the tooth, what is the magnification of image.
A 3.40 g coin is positioned 16.0 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of mu_s = 0.720 and mu_k = 0.480. What is maximum angular velocity with which the turntable can sp..
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
A 1020kg artillery shell is fired from a battleship. While it is in the barrel of the gun, it experiences an acceleration of 2.1x10^4m/s^2. what net force is exterted on the artillery shell before it leaves the barrel of the gun
A 60kg student carrying a 5.0kg school bag walks up to flights of stairs in 30 seconds to reach the library. How much power did the student generate
Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy
On a workday the average decibel level of a busy street is 65 kb, with 121 cars passing a given point every minute. If the number of cars is reduced to 33 cars every minute on a weekend, what is the decibel level of the street.
Derive an equation for radius r of circular path that the electrons follow in terms of the magnetic field B, the electrons’ velocity v, charge e, and mass m. You may assume that the electrons move at right angles to the magnetic field.
Explain functionalism, conflict theory and interactionism
A hydrogen atom initially in its ground state (n =1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon
An ideal gas is compressed at constant pressure to one-half its initial volume. find the initial volume of the gas
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