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In an advanced laboratory class a student performs the photoelectric experiment. Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. It is found that 1.65 V is needed to stop all the electrons when the wavelength of the light is 272 nm, and 2.70 V for a wavelength of 228 nm.
1) What is the work function of the metal?
2) What is Planck's constant based on this measurement?
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time". If the ball is kicked with an initial velocity of 25.0 m/s at an angle of 60.0 degrees above the ground, illustrate what is the "hang time"?
Three charges are situated at corners of a rectangle. How much energy would be expended in moving the 8µC charge to infinity.
A motorist driving along a straight road at a constant speed of 60 -m/s. At time t=0 she passes a parked motorcycle police officer and begins to accelerate at the constant acceleration.
The department actually completed 10,000 hours of production. Illustrate what is the appropriate total budget for the department, assuming it uses flexible budgeting?
Equipotentials between two parallel lines with a floating circular electrode: I dont need to know the exact potentials, What should be the potential inside the electrode
What is an average speed of the runner
A source produces sound waves of time period .001 second and wave length of 20 cm. find the time taken by sound waves to travel a distance of 800 metres.
Calculate the pressure at the center of pipe A. Suppose T = 10?C.
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.75 105 Pa and the pipe radius is 2.60 cm, Find the speed of flow in the lower section
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. how much is on the outer surface of the car
A 6.30kg block is pushed 9.45m up a smooth 37.0? inclined plane by a horizontal force of 80.0N . If the initial speed of the block is 3.35m/s up the plane. Calculate the initial kinetic energy of the block
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