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Vladimir79 [104]
3 years ago
15

How would one be able to travel in time?

Physics
1 answer:
diamong [38]3 years ago
7 0
The most important thing that one would need to have is a clear, vivid, active, convincing imagination. In reality, time travel is not possible.
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A 30,000-kg freight car is coasting at 0.850 m/s with negligible friction under a hopper that dumps 110,000 kg of scrap metal in
erica [24]

Explanation:

Given that,

Mass of a freight car, m_1=30,000-kg

Speed of a freight car, u_1=0.85\ m/s

Mass of a scrap metal, m_2=110,000\ kg

(a) Let us assume that the final velocity of the loaded freight car is V. The momentum of the system will remain conserved as follows :

30000\times 0.85=(30000+110000)V\\\\V=\dfrac{30000\times 0.85}{30000+110000}\\\\=0.182\ m/s

So, the final velocity of the loaded freight car is 0.182 m/s.

(b) Lost on kinetic energy = final kinetic energy - initial kinetic energy

\Delta K=\dfrac{1}{2}[(m_1+m_2)V^2-m_1u_1^2)]\\\\=\dfrac{1}{2}\times [(30,000+110,000 )0.182^2-30000(0.85)^2]\\\\=-8518.82\ J

Lost in kinetic energy is 8518.82. Negative sign shows loss.

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2 years ago
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Answer:

Explanation:

horizontal is zero slope, and the vertical is undefined

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3 years ago
A parsec is a measurement of: magnitude distance position speed
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A parsec is a measurement of distance.
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A police car parked on the side of the highway emits a 1200 Hz sound that bounces off a vehicle farther down the highway and ret
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f' = frequency observed by the police car after sound reflected from the vehicle and comes back to police car = 1250 Hz

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frequency observed by the police car is given as

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Hope it helps :)

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3 years ago
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