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A photoelectric experiment using a cesium metal surface produces stopping potentials of 0.95V and 0.38V using light with wavelengths of 435.8nm and 546.1nm, respectively. Using only this data together with the values of the speed of light and the charge on the electron, find
(a) the value of Planck's constant,
(b) the work function for cesium (in eV) and
(c) the threshold frequency.
A 2 kg ball has been thrown vertically upward. If we ignore the air resistance, what are the direction and size of the net force acting on the ball while it is traveling upward?
Two shoppers walk from the door of mall to their car, that is 250m down a lane of cars and then turn 90 degrees to the right and walk an additional 60m what is the magnitude of the displacement of the shopper's car from mall door.
A tractor pulls a sled of mass M = 1375 kg across level ground. The coefficient of kinetic friction between the sled and the ground is ?k = 0.605, What magnitude of tension in the rope is necessary to move the sled horizontally
What is the effective spring constant (that is, the ratio of force to change in length) of a copper cable that is 7.0 in diameter and 13 long?
A disoriented physics professor drives a distance 3.25km north, then a distance 3.65km west, Find the direction of the resultant displacement, using the method of components
The electric potential at x = 3.0 m is 120 V, and the electric potential at x = 5.0 m is 190 V. What is the electric field in this region, assuming it's constant? -140 N/C 140 N/C -35 N/C 35 N/C 75 N/C.
What is the force between two balloons with a negative charge of 2.6 x 10-10C if the balloons are 10.0 cm apart?
What value of capacitance will ensure that an output voltage stays within 3 percent of the rated 22v . find an electric field between them and surface charge density on the plate.
There are two pith balls that are suspended from a pendulum and repel each other, calculate the tension of the string and the mass of the balls
A 250 kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, What fraction of the power carried by the line is this
An empty rubber balloon has a mass of 0.0120kg. The balloon is filled with helium at 0oC, 1atm pressure, and a density of 0.179kg/m3, What is the magnitude of the buoyant force acting on the balloon
Incurred expenses of $220,000 for its alcohol rehabilitation program but paid the expenses from unrestricted resources, not from available restricted resources.
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