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Nana76 [90]
3 years ago
12

A shunting engine in a rail yard is working on a straight east-west section of line. First it travels west for 150 s with an ave

rage velocity of 4 m/s, to hook up to 10 empty freight cars. Then it pulls the cars east with an average velocity of 3 m/s for 200 s, to a loading area. Calculate the engine's final displacement.
Physics
2 answers:
Ymorist [56]3 years ago
7 0

Displacement-1

\\ \rm\longmapsto Velocity(Time)

\\ \rm\longmapsto 150(4)

\\ \rm\longmapsto 600m

Displcaement-2

\\ \rm\longmapsto 200(3)

\\ \rm\longmapsto 600m

Total displacement=600+600=1200m

irinina [24]3 years ago
7 0

<u>Displacement-1</u>

⟼Velocity(Time)

⟼150(4)

⟼600m

<u>Displcaement-2</u>

200(3)

⟼200(3)

⟼600m

Total displacement=600+600=1200m.

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The density of the nickel was greater than that of the quarter and penny, thus, the results supports the hypothesis.

<h3>What is density of substance?</h3>

The density of a substance is a measure of how tightly-packed the particles of the substance are.

Density is calculated as the ratio of the mass of the substance and the volume of the substance.

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The hypothesis of the lab to compare the densities of a penny, a nickel, and a quarter is:

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The average mass and the average volume of a penny, a nickel, and a quarter are then used to determine the density of each coin.

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In conclusion, the density of a substance depends on the mass and the volume.

Learn more about density at: brainly.com/question/1354972

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Answer:

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