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Bernard de Fontenelle, popularize of scientific learning, was for fifty years secretary of what?
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The 0.082-kg stone strikes the boat at a velocity of 15 m/s, 15° below due east, and ricochets off at a velocity of 8 m/s, 12° above due east. After being struck by the stone, the boat's velocity is 1.9 m/s, due east. What is the mass of t
A proton and an alpha particle (charge = 2e, mass = 6.64* 10^-27 kg) are initially at rest, separated by 7.40 * 10^-15 m.
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?
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?
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.
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?
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