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When ultraviolet light with a wavelength of 254 nm falls upon a clean metal surface, the stopping potential necessary to terminate the emission of photoelectrons is 0.181 V.
(a) What is the photoelectric threshold wavelength for this metal?
(b) What is the work function for the metal?
Scientists have recently shown that a sample of cocaine can be traced to its country of origin by measuring the ration of carbon-13 to nitrogen-15 (both naturally occuring, stable nuclides) in the cocaine sample.
While traveling along a level highway at a speed of 27m/s you shift the vehicle into neutral and find it takes 45 second to slow down to 20 m/s mile per hours.
A heat engine using a diatomic ideal gas goes through the following closed cycle: Isothermal compression until the volume is halved. What is the thermal efficiency of this heat engine
A cubical block of wood 10cm on a side, floats at the interface between oil and water with its lower surface 1.50 cm below the surface
An airplane travels at speed of 125 m/s in calm air. The plane wants to undergo a change of displacement delta x= 183 km i. How lond will it take the plane to reach its destination
A 73cm long metal string under 35.0N tension has a linear mass density of 2.45x10^-4 kg/m. Find the frequencies of the first three harmonics
A narrow beam of light with wavelengths from 450 nm to 700 nm is incident perpendicular to one face of a 40.00 degreee prism made of crown glass
What is the charge on a 1.0 cm length of wire. What is the net force exerted on the skier.
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
A pair of closely spaced parallel conducting plates, charged with equal and opposite electric charges, produces a uniform electric field in the region between them, What must the strength of the electric field be
Two equal forces act on the two different objects, one of which has a mass ten times as large as the other. Will the more massive object have the larger acceleration, an equal accelearation, or a smaller acceleration.
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