PHYSICS HIGH SCHOOL

When starting a heavy train, why will train engineers sometimes back up, stop, and then proceed forward? (This technique is called "bunching slack.")

Answers

Answer 1
Answer: it is kind of in the name. it brings the cars closer together then continues to go forward.
Answer 2
Answer: maybe....
when going in reverse it makes a tiny gap between each boxcar, then when going forward it pushes or pulls each car one at a time to build momentum rather than moving them all at once...not sure

Related Questions

An automatic response to a stimulus is called a reflex.
What type of image is formed by a mirror if m = -6.1? A. An image that is larger than the object and is behind the mirror B. An image that is larger than the object and is in front of the mirror C. An image that is smaller than the object and is in front of the mirror D. An image that is smaller than the object and is behind the mirror
A monkey is sitting on a tree when it sees a hunter claiming a near by tree. The Hunter is aiming directly at the head of the monkey.The money jumps out of the tree at the exact same time the arrow is released from the hunters bow. Assume the Hunter has perfect aim, the monkey has zero reaction time and that air resistance is negligible. Explain wether the monkey will avoid bring struck by the arrow.
Two technicians are discussing hydraulics. Technician A says that if pistons of the same size are used, motion and force can be increased or decreased. Technician B says that if a small piston acts upon a larger piston, the force of the larger piston will increase, but the distance it travels will decrease. Who is correct? A. Technician B only B. Technician A only C. Both Technician A and B D. Neither Technician A nor B
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Which item is made from a synthetic material?

Answers

Some examples of Synthetic Material is:

nylon

polyester

Synthetic Fabrics are very useful

Hope it helped : )

Bees obtain food they need from flowers. The flowers benefit by having their pollen dispersed by the bees as they travel from flower to flower. What type of symbiotic relationship is this?

Answers

the type of symbioric relationship that both the flower that the bees ins is : Mutualism In mutualism relationship, both organims from the relationship benefit from each other. In this case, the bees benefited by getting their source of food from the flowers, and the flowers benefited by the bees helping them to started their reproductive process

Answer:

B - Mutualism

Explanation:

Just took the test Edge 2020

Factors that influence the balance of earth's incoming and outgoing radiation are called _____.

Answers

The factors that influence the balance of Earth's incoming and outgoing radiation are called "radiative forcings." These forcings can include natural factors like volcanic eruptions and solar variations, as well as human activities such as greenhouse gas emissions.

what is the force of gravity between a 1000000000 kg asteroid and the earth when the asteroid is 3000000 m away from the earth?

Answers

Mass of the Earth = 5.972 x 10²⁴ kg
Mass of the asteroid = 1 x 10⁹ kg
Separation distance = 3 x 10⁶ m  (between the Earth's center and the asteroid's center)
                   

Gravitational force between two masses =

        (6.67 x 10⁻¹¹ nt-m²/kg²) · m₁ · m₂ / (distance)²

=  (6.67 x 10⁻¹¹ nt-m²/kg²) · (5.972 x 10²⁴ kg) ·  (1 x 10⁹ kg) / (3 x 10⁶ m)²

=  (6.67 · 5.972 / 9) x 10¹⁰ · (nt · m² · kg · kg / kg² · m²)

             =      13.28 x 10¹⁰     newtons

             =        132.8  Giga-newtons .

     (about  14,926,763 tons)
         

If a magnet is cut in paris what will be its north and south pole

Answers

When carried out in Paris, the procedure will produce the same results as in
Stockholm, Copenhagen, Rome, or Madrid.  There is no reason to expect a
different outcome in any other world capital. 
When a magnet is cut into two parts, then both parts will have a south and north pole because magnetic fields lines are continuous and always formed closed loops.

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How does a water molecule transfer from the ocean to form part of a cloud in the atmosphere?A.
precipitation from the ocean and then evaporation into a cloud


B.
condensation from the ocean and then evaporation into a cloud


C.
precipitation from the ocean and then collection into a cloud


D.
evaporation from the ocean and then condensation into a cloud

Answers

The right answer for the question that is being asked and shown above is that: "B. condensation from the ocean and then evaporation into a cloud." a water molecule transfer from the ocean to form part of a cloud in the atmosphere is that condensation from the ocean and then evaporation into a cloud

Answer:

b

Explanation:

that to somebody who answered!
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If a car can go from 0.0 to 60.0 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50.0 mi/hr?