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wel
3 years ago
7

How many variables should be tested at one time in a scientific investigation?

Chemistry
1 answer:
shutvik [7]3 years ago
6 0
One should be tested at once. You never want to test more because you will mix up your data
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A roller coaster starts down a hill at 10 m/s. Three seconds later, its speed is 32 m/s. What is the roller coaster’s accelerati
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Final velocity(v) = 32 m/s
Initial velocity(u) = 10 m/s

Using kinematic equation v = u + at, 

32 = 10 + a(3)

32-10
---------  = a
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a = 22
      ----
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a = 7.3 m/s^2.

Hence acceleration of the roller coaster is 7.3 m/s^2.

Hope this helps!!
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