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sallonquarts
26.10.2019 •
Physics
Apenny falls from a windowsill 25.0 m above the sidewalk. how fast is the penny moving when it strikes the ground? (remember that the velocity will be negative due to the downward motion of the penny)
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Ответ:
vf = √(2ax) where a is the acceleration ( a = g ) and x is the height
vf = √(2)(9.8)(25)
vf = - 22.14 m/s
Ответ:
1. Solubility
2. Heat 100g of water to 35 degrees C. Add 37 grams of mystery salt.
3. If all the salt dissolves, it's KCl. If not, it's KNO3.