Fermium-253 has a half-life of 3.00 days. A sample of fermium has 3.88 × 106 nuclei. What is the initial activity of this sample?
A) 10.4 kBq B) 12.9 kBq C) 12.9 Bq D) 10.4 Bq
D
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Linear momentum __________ conserved
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If we had the most powerful optical microscope in the world stacked on top of the next most powerful optical microscope in the world, we would
1) probably see atoms, 2) probably be able to photograph atoms even if we couldn't see them, 3) still not be able to see an atom, because atoms are 4) invisible. 5) visible when illuminated with infrared light. 6) material particles which have mass and size. 7) smaller than the wavelengths of visible light.
in the jet’s direction of motion, which part of the airplane becomes negatively charged?
A. Its nose B. Its tail C. Its top D. Its bottom E. Its left wing F. Its right wing T. (No part becomes charged.)
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.After the dropped box hits the floor, its kinetic energy is converted into ____________
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