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If you are asking about why light bends when it passes through the water and glass...For the purpose of this answer, think of light as a beam (what light actually is, is a topic of much research and questioning). Light travels through water with a different velocity than it does through air. Thus, whenever light hits water at an angle, part of the beam is slowed down by the water before the rest of the beam, so the beam curves and what you see becomes distorted.If it helps, think of a tractor with two treads. Now picture this tractor heading in a straight line at a constant velocity. Both of the treads are moving at the same speed, right?Now, imagine there is a puddle of mud up ahead. The puddle of mud is positioned such that one side of the tractor will enter it before the other. What happens when the tractor reaches the mud? One tread slows down, because it entered the mud. The other, since it is still on solid ground, keeps going at the same speed. Because of this, the tractor will turn towards the tread that hit the mud, thus altering its direction.Hope it helps.
No I think it depends what kind of tractor and what kind of piano.
kilograms
There are several. Inertia is one of them.
2000
4700 pounds, if the tires are filled then it will be heavier.
Referring to a US "Arctic" road tractor, generally between 20,000 - 25,000 lbs, though some - such as the ones with the 300+ inch wheelbase and ICT sleepers - will be heavier.
Assuming that these vehicles are all travelling at the same speed, it would be the one with the greatest mass, the tractor-semi, because kinetic energy is given by mv2, where m is mass and v is velocity.
a John deer tractor
tractor
A tractor is a noun.
with tractor parts
tractor
U Can Use Tractor tires to run A farm Tractor
What did I the farmer say when he lost his tractor
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tractor trailer