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In an experiment electrons are released with a kinetic energy of 2.8 eV. The amazing physicists doing the experiments are increasing the wavelength by 50%. Do you remember what happens? Are the photoelectrons faster or slower? The energy now is 0.44 eV.
A) Based on that information, what is the material of the cathode?
B) What is the initial wavelength of the light?
C) When you go a few pages back in the textbook you can find out the temperature of a physical object radiating at that wavelength
A child and sled with a combined mass of 58.0 kg slide down a frictionless slope. What is the height of the hill
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Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Assume the speeds of the two canoes after they are pushed apart are 0.60 m/s for canoe 1and 0.44 m/s for canoe 2.
A railroad car of mass 2.48 x 104 kilogram is moving with a speed of 3.82 m/s. Calculate the speed of the four cars after the collision
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The amplitude of a system moving with simple harmonic motion is doubled. The total energy will the be:
What is the coefficient of static friction among the coin and the turntable? Express your answer using two significant figures.
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