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coldgirl [10]
3 years ago
9

When cleaning up a local beach, students found many different particles that were in the water that affected the shoreline, like

litter and gasoline. Which of the following describe how these items would need to separated from the water? Why?
A. Both gasoline and litter would need to be chemically separated from the water, because both form new bonds with the water.


B. Litter would need to be physically separated with water and gasoline would need to be chemically separated from water, because both form a mixture with the water.


C. Both gasoline and litter would need to be chemically separated from the water, because neither bonds with the water.


D. Both gasoline and litter would need to be physically separated from the water, because neither bonds with the water.


(p.s. Do teachers know about this? like fr)
Physics
1 answer:
Wewaii [24]3 years ago
4 0

The correct answer is D,

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prohojiy [21]

Answer:

410 m

Explanation:

Given:

v₀ = 20.5 m/s

a = 0 m/s²

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Find: Δx

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Δx = 410 m

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What are the unit for acceleration
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Dragsters can actually reach a top speed of 145.0 m/s in only 4.45 s. (a) Calculate the average acceleration for such a dragster
astraxan [27]

Answer:

a) 32.58 m/s²

b) 161.84 m/s

Explanation:

Initial velocity = u = 0

Final velocity = v = 145 m/s

Time taken = t = 4.45 s

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a = Acceleration

v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{145-0}{4.45}\\\Rightarrow a=32.58\ m/s^2

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as-u^2}\\\Rightarrow v=\sqrt{2\times 32.58\times 402-0^2}\\\Rightarrow v=161.84\ m/s

The final velocity is greater than the velocity used to find the average acceleration due to the gear changes. The first gear in a dragster has the most amount of toque which means the acceleration will be maximum. The final gears have less torque which means the acceleration is lower here. The final gears have less acceleration but can spin faster which makes the dragster able to reach higher speeds but slowly.

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