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If a tunnel is bored through the center of earth and a pebble is dropped into it then what will happen?
Wiki User
∙ 11y ago
Theoretically . . . (just like boring the tunnel through the globe in the first place) . . .
The pebble falls faster and faster until it reaches the center of the Earth. Then
it continues in the same direction but slower and slower. Its speed declines to
zero just as it drifts out of the other end of the tunnel. If nobody is there to
catch it, and it falls back into the tunnel, it goes through exactly the same thing
in reverse ... falling faster and faster until it reaches the center of the Earth,
then slower and slower until it drifts out of the tunnel again, right in front of
you, at the spot where you dropped it in the first time.
It's doing a gigantic pendulum, swinging surface-to-surface, fastest at the center
and zero speed at each end, where it reverses.
The period of the pendulum ... from the time you drop it in until it comes back up
in front of you out of the hole in the ground ... is 86 minutes.
Exactly the same period that it would have if it were an artificial satellite in the
lowest conceivable orbit ... the same size as the Earth's radius without running
into mountains or air.
If there's no air resistance and it doesn't run into things, then the size, shape,
mass, or weight of the pebble make no difference, in either exercise.
Wiki User
∙ 11y ago
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A pebble is dropped from the top of a 144-foot building. The height of the pebble h after t seconds is given by the equation h-16t2 plus 144h and minus16t2 plus 144 . How long after the pebble is drop?
A pebble is dropped from the top of a 144-foot building. The height of the pebble h after t seconds is given by the equation h=−16t2+144 . How long after the pebble is dropped will it hit the ground?Interpretationa) Which variable represents the height of the pebble, and in what units?b) Which variable represents the time in the air, and in what units?c) What equation relates the height of the object to its time in the air?d) What type of equation is this?e) What are you asked to determine?
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Because it's heavy
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What is a plop as a sound?
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What does a pebble to start off with?
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What happens in the spiritual realm when you pray?
Think of a prayer as pebble and the spiritual realm as the still pond into which the prayer is dropped.
What might happen to a pebble plant in the heat of the sun if it had a large flat surface with a thin body?
The Surface Area of the Pebble plant that is exposed to the Sun will be greater and will become too hot; hence the pebble plant will lose lots of it's water.
What might happen to pebble plant in heat of the sun if it had a large flat surface with thin body like a pancake?
The Surface Area of the Pebble plant that is exposed to the Sun will be greater and will become too hot; hence the pebble plant will lose lots of it's water.
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Why do the fishes become restless when you drop a pebble into the aquarium?
The pressure waves of the pebble hitting the water and falling through it are felt by the fish through their lateral line. It's roughly analogous to sitting in your living room and momentarily feeling a sharp draft.
