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neonofarm [45]
3 years ago
7

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

Physics
1 answer:
leva [86]3 years ago
5 0
Probable how long they were moving
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What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure
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Answer:

this is a no brainer

Explanation:

As air pressure in an area increases, the density of the gas particles in that area increases.

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Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that a
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2 years ago
What is similar about analogical and symbolic representations?
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3 years ago
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Three identical train cars, coupled together, are rolling east at 1.8 m/s . A fourth car traveling east at 4.5 m/s catches up wi
Vedmedyk [2.9K]

Answer:

v = 1.98\ m/s

Explanation:

consider the mass of each train car be m

m₁ = m₂ = m₃ = m

speed of the three identical train

u₁ = u₂ = u₃ = 1.8 m/s

m₄ = m             u₄ = 4.5 m/s

m₅ = m              u₅ = 0 (initial velocity )

final velocity

v₁ = v₂ = v₃ = v₄ = v₅ = v

using conservation of momentum

m₁u₁ + m₂u₂ + m₃u₃ + m₄u₄ + m₅u₅ = m₁v₁ + m₂v₂ + m₃v₃ + m₄v₄ + m₅v₅

m (1.8 + 1.8 + 1.8 +4.5) = 5 m v

v = \dfrac{9.9}{5}

v = 1.98\ m/s

5 0
3 years ago
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