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light with a wavelength range of 145-295 nm shines on a silicon surface in a photoelectric effect apparatus, and a revering potential of 3.5 V is applied to the resulting photoelectrons.
(a) What is the longest wavelength of the light that will eject electrons from the silicon surface?
Two boxes are connected to each other. The system is released from rest and the 2.00kg box falls through a distance of 1.00m. what is the tension in the connecting string
Suppose that the swimmer in the figure below has a swimming speed relative to the water of 0.44 m/s, while the speed of the current is 2.3 m/s. how wide is the river
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A 0.157kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time.
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q1. a 3.10-m-long 310 kg steel beam extends horizontally from the point where it has been bolted to framework of a new
You are piloting a spacecraft whose total mass is 1130 kg and attempting to dock with a space station in deep space. What is the initial thrust exerted on your spacecraft by the retro-rocket? What is the thrust's direction (positive if in the direc..
If the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by
A tugboat pulls two barges with a force of 3000N. The water slows each of the boats with a force of 200N (3 total forces of 200N each). what is the accleration of the boats
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.3 s later. How deep is the ocean at this point? Suppose the speed of sound in seawater is 1560 m/s and d..
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