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When a wavelength is 300nm, its stopping potential is 1.10V. When it is changed to 200nm, the stopping potential is 3.06V.
1) What value does this experiment yield for Planck's constant?
2) What's the percent error from the accepted value of h?
3) Using the value h in the first part, find the threshold frequency and work function for this metal.
An 85 kg spacewalking astronaut pushes off a 655 kg satellite, exerting a 115N force for the 0.600 s it takes him to straighten his arms.
baseball toward home plate at 85 miles per hour with a spin of 1800 revolutions per minute. Explain how many rotations does it make on a path of 60 feet?
A 100kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30 below the horizontal. The coefficient of kinetic friction is 0.20. What must be the magnitude of P, so that the net work completed by it and the kinetic..
A composite bar made from two different materials of equal cross-sectional areas are directly attached to each other making the bar a length of L = L1 + L2.
A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at theta=45 degrees. The disk accelerates steadily for 0.50 s, reaching 2000 rpm, after those coasts at steady angular velocity for another 0.50 s.
At the bottom of the slope, the path levels out and become horizontal, the snow becomes less icy, and the skier begins to slow down, coming to rest in a distance of 160.00 m along the horizontal path.
Du Pont and net income Ebersoll Mining has $6 million in sales; its ROE is 12 percent; and its total assets turnover is 3.2 . The company is 50 percent equity financed. Illustrate what is its net income?
A civil engineer wishes to plan a curved exit ramp for a highway in a way that a car will not have to rely on friction to round the curve without skidding. In the other words, a car moving at the designated speed can negotiate the curve even while th..
find the potential energy at each location below. How far from the point of the drop will the rock hit the ground.
Kingbird Corporation made a contribution to a qualified charitable organization of $6,300 in cash (not comprised in any of the above items). Determine Kingbird's charitable contribution deduction for the current year.
What is the magnitude of the vertical component of its velocity as it strikes the ground.
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. What is the acceleration of the crate if the 750 N forces is maintained after the crate begins to move and coefficient of kine..
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