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Physics
Distance vs Displacement As an object moves, its location undergoes change. There are two quantities that are used to describe the changing location. One quantity - distance accumulates the amount of total change of location over the course of a motion. Distance is the amount of ground that is covered. The second quantity - displacement - only concerns itself with the initial and final position of the object. Displacement is the overall change in position of the object from start to finish and does not concern itself with the accumulation of distance traveled during the path from start to finish. True or False: An object can be moving for 10 seconds and still have zero displacement. A. True B. False
Down syndrome most often occurs when _____. A: a person inherits a recessive allele B: blood fails to clot properly C: sickle-shaped cells become stuck in blood vessels D: chromosomes fail to separate properly during meiosis
Which is the best example of translational motion? an ice skater in place water molecules in a glass of water a powder up rocket on the launch pad a soccer ball passed between two players
When launching your boat, when should you start and test the engine?
Which of the following is NOT a factor that affects the apparent brightness of a star as seen from Earth? A. how old the star is B. how big the star is C. how hot the star is D. how far away the star is
If a 3-kilogram iron ball is acted upon by a force of 3 newtons, what will be the result?
Which quantity causes a change in linear momentum?
ghee freezes from bottom but water freezes from top, why?
Which is a characteristic of nuclear funsion?
A kayaker needs to paddle north across a 85 m wide harbor. The tide is going out, creating a tidal current that flows to the east at 2.0 m/s. The kayaker can paddle with a speed of 3.4 m/s. (a) In which direction should he paddle in order to travel straight across the harbor? (b) How long will it take him to cross?
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