: Sinking Boat Problem

[somya]

Put a nut in a cup. Float the cup in a jar of water and mark the
water level in the jar.

Punch a hole in the bottom of the cup and again put it in water.
Water starts entering the cup and it gradually sinks. Observe water
level in the jar while the cup is sinking and after it has sunk.
Now Answer
1. When the cup is sinking, water level in jar
(a) Increases (b) Decreases (c) Remains same

2. When the cup has sunk, water level is
(a) Increasing (b) Decreasing (c) Remains same

3. Name the principle on which this activity is based?

[factor-fiction]

Have you tried it?

[Canary42]

It depends who the nut is

[Mamyalynne]

I haven't got a jar big enough for a cup - would a jug in a bucket do?

[somya]

yes, it will work..

[Mamyalynne]

I'll have to drill a hole in the jug won't I?

[Mamyalynne]

I'm not really allowed sharp objects.

[EcclesCake]

What are your thoughts on what would happen Somya?

If you show that you have given this some consideration you might get some more helpful answers.

[somya]

it is an metal nut and you have to take paper or plastic cups..
so that a hole can easily be made.

[EcclesCake]

You need not worry about the materials involved Somya just think through what happens.....the displacement of the water......

So, what do YOU think will happen?

[somya]

what you can do is, take a plastic cup, make a hole beneath it. Fill a jar with enough water so that the cup can be easily sink and put a nut (metal nut) in it.
Put the cup in that jug and observe the above questions!

[somya]

I think it remains the same..

[EcclesCake]

Is that your answer for both questions 1&2? Any thoughts on q3?

[somya]

in both the cases. As it will be sinking. the place that it be taking would be covered as that much water will enter the cup. so the water level will remain the same.
Can anybody give me a good laguage of this principle ??

[EcclesCake]

This is a terribly simple experiment that you could easily do at home. Why don't you give it a go?

Then YOU will KNOW the answer having proven it.

I've already given you a clue.

[somya]

Can anybody give me a good laguage of this principle ??
Please...

[somya]

I have understood what you are explaining me but i am unable to make a correct laguage for it.. can you help me in making the language too??

[EcclesCake]

It's best you explain it in your own words from observing the experiment.

I have given you a clue for the principle.