Frequency of the vibration electron
What is the wavelength of red light is about 700 nanometers or 7x 10. the frequency of the red light reflects from metal surface and the frequency of the vibration electron that produces it are the same.
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A sample of radioactive isotopes contains two different nuclides, labeled A and B. Initially, the sample contains the same number of nuclei A as B (i.e. the sample composition is A/B = 1).
If the dolphin is moving horizontally when it goes through the hoop, how high above the water is the center of the hoop?
Bernard de Fontenelle, popularize of scientific learning, was for fifty years secretary of what?
The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.44 m/s2 on a level track, what is the tension in the coupling between the second and third cars?
A student who weighs 490 N is wearing a backpack that weighs 88 N. What is the magnitude of the contact force on the student by the backpack?
How do chemokines influence the location of B and T cells in the peripherallymphoid organs? What happens after antigen activation?
What two tests show if an argument is sound? What tests show if an agument is good?
The work done by friction on the rock when it moves from point A to point B at the bottom of the bowl is -0.22 J. What is the speed of the rock when it reached point B?
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