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In a classical model of the hydrogen atom, the electron movesaround the proton in a circular orbit of radius 0.053 nm. What is the electron's orbital frequency? What is the effective current of the
How is electric potential related to elective potential energy? How does various charge distributions create an electric potential and how does the potential charge? How are electric field and elect
A kicker's extended leg is swung for 0.4 s in a counterclockwise direction while accelerating at 200 deg/s2. What is the angular velocity of the leg at the instant of contact with the ball?
The angular velocity of a runner's thigh changes from 3 rad/s to 2.7 rad/s during a 0.5 s time period. What has been the average angular acceleration of the thigh?
An accident in a fuel reprocessing plant, caused by improper mixing of 235-U, produced a burst of fission energy liberating energy equivalent to the detonation of 7kg of TNT (4.2 GJ/ton = 4.6 kJ/g).
The desired capacitance is 0.200 µF, and the capacitor must withstand a maximum potential difference of 4.00 kV. Find the minimum area of the capacitor plates.
At what speed do a bicycle and its rider, with a combined mass of 110 , have the same momentum as a 1200 car traveling at 5.8 ?
How much coal (in g/y) would be needed (coal has a heat content of about 12 GJ/ton)? Assume a conversion efficiency of 33% of thermal energy into electrical energy.
In an 8-ounce glass of water, estimate the available D-D fusion energy. For how long could this energy provide the energy needs of a house with an average power consumption of 10kW?
Calculate delta H and Delta Stot when two iron blocks, each of mass 1.00 kg one at 200 deg C and the other at 25 deg C are placed in contact in an isolated container. The specific heat capacity of i
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed V-final of the electron when it is 10.0cm fro
The beryllium and aluminum lines are separated by 2.700 cm on the photographic plate, and the unknown element makes a line between them that is 1.073 cm from the beryllium line. (a) What is the mass
A capacitor consists of two closely spaced metal conductors of large area, separated by a thin insulating foil. It has a capacitance of 3000 x 10-6 F and is charged to a potential difference of 87.0
Three equal point charges, each with charge 1.95uc , are placed at the vertices of an equilateral triangle whose sides are of length 0.400m . What is the electric U potential energy of the system?
Calculate (a) the entropy of vaporization of methanol at this temperature and (b) the entropy change of the surroundings.
At what speed must you rotate this coil in order to induce an alternating emf of amplitude 11.00 V between the ends of the wire? Give you answer in rev/s. Do not enter the units.
What is the speed V-final of the electron when it is 10.0cm from charge 1? Express your answer in meters per second.
Assume that all gases are perfect and that data refer to 298.15 K unless otherwise stated. Calculate delta H and Delta Stot when two iron blocks, each of mass 1.00 kg one at 200 deg C and the other
Assume also that the rope is long enough to allow the crate to hit the ground before the crewman slides over the side of the cliff. Also, at what speed will the crewman hit the bottom of the ravine?
A beam of electron is that through a small hole into vacuum between two parallel plates wich are separated by a distance D=2.5 cm. A voltage V= 500 volts is applied across the plate, with the far o
Using the expression relating the rate at which current changes in an inductor to the voltage produced at it, find the voltage across the inductor when a switch supplying 2.2 A to a 3.8 mH inductor
Two force vectors act on an object: i) 60.0 Newton at 45.0° north of east and ii) 25.0 Newton at 30.0° south of east. Find the magnitude of the resultant force and its direction?
Two ropes pull on the ring shown. The net force action on the ring is 205 N directly upward. What are the magnitudes of the two tension forces of the rope? 45 degree and 30 degree angles pulling aga
There is a pipe that is 120 inches in length and 12 inches in diameter and with a pressure of 10 psi air is pushed through the pipe. How would I calculate the air flow rate per second with the infor
A spring-loaded gun, fired vertically, shoots a marble 5.2 straight up in the air. What is the marble's range if it is fired horizontally from 1.3 above the ground?