#31 - Science Riddle For High School

There is a boat with a brick of gold and a brick of iron. Both the blocks are exactly 10 inch in size. If they are dropped into the surrounding water of river.

Which one of the blocks will make the water level higher?

Science Riddle For High School
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The iron block will make the water level higher.

In actual terms, none of the block will make the water level higher. This is because, while in the boat, they have a larger effect on the water level and they are raising it. But, when they are dropped in the water, they will actually make the water level drop. But, the iron block will make the water level drop much less than the gold block because it is lighter and will have less effect on the water from the boat but will displace the same amount of water as the gold one when dropped into the water.

#32 - Scientific Riddle

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it ?

Scientific Riddle
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To achieve this, you must throw that ball as hard as you can in the air and gravity will bring it back to you.

#33 - Science Weigh Puzzle

You balance a broom horizontally on your finger such that your finger is present on the center of the gravity of the broom (precisely). You mark the spot and cut the broom into two halves. You are left with two pieces - one long piece with the handle and one short piece with bristles and a portion of handle.

If you weigh both the pieces now, what will happen?
a) The longer piece weighs more.
b) The shorter piece weighs more.
c) Both pieces weighs equal.

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The shorter piece will weigh more.

This will happen because to hold the long piece, more torque is needed. You can see a live example if you make a fat kid sit on the opposite corner of the see-saw to a thin kid. The fat kid will have to sit closer in.

#34 - Trivia Geography Puzzle

There is a place where if i stand up straight, i still be can considered sideways ?

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The equator.

I stand up straight with respect to the ground, but is sideways with respect to the Earth axis.