Physics trick pour water over your

No matter if you made it yourself having obtained the appropriate permits, of coursegot it from a friend who made it, or bought some white whiskey at the store, I would certainly highly recommend aging your own! Aging any whiskey, moonshine, brandy, or other spirits can add a lot of flavor, complexity, depth, and smoothness to the final spirit.

Physics trick pour water over your

The upside-down water trick. You now have water on the floor. Why did you listen to me? Pour water in the same glass again. Put an index card over the mouth of the glass and press the palm of your hand on the index card, pressing the card against the rim of the glass and depressing it slightly into the glass in the center this part is very important.

While your hand is on the index card over the mouth of the glass, invert the glass and slowly take your hand away. If you hold the glass steady and level, the water should remain in the glass Fig. The answer has to do with air pressure.


Any object in air is subject to pressure from air molecules colliding with it. This air pressure is pushing up on the card from below, while the water is pushing down on the card from above.

Physics trick pour water over your

The force on the card is just the pressure times the area over which the pressure is applied; that's the definition of pressure. Diagram showing the relevant forces on the water.

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The blue arrows indicate the forces due to air pressure above and below the water. The red arrow indicates the force of gravity. Together, the three forces balance out to cancel each other. The details of this delicate balance are more easily understood by looking at the forces on the water, rather than on the card see Figure 2.

The card transfers the force of the air pressure upward to the water, so there is a pressure of almost 1 one atmosphere pushing up on the water from below. Of course there is also pressure from the air inside the glass pushing down on the water from above.

The air inside the glass was originally at one atmosphere of pressure when you put the card over it, but when you inverted the glass and removed your hand, the water moved downward a very slight amount perhaps making the card sag ever so slightlythereby increasing the volume allotted to the air.

As the air expands to fill this increased volume, several things happen at once. The air molecules spread out so that fewer of them hit the edges of the volume each second, and they slow down so that they don't collide with the container quite as forcefully.

As a result, the air pressure goes down a tiny bit according to Boyle's Law. Now the pressure inside the glass pushing down is not as great as the outside pressure pushing up, and this pressure difference is enough to counteract the gravitational force pulling down on the water.

Once the card sags enough so that these three forces balance, everything will stay put. There is another separate effect that helps keep the water in the glass. Water molecules have a strong attractive "cohesive" force between them due to the fact that each water molecule can make four hydrogen bonds with other water molecules.

This cohesive force is the origin of surface tension.In ancient times, a King had a boulder placed on a roadway.

Physics trick pour water over your

Then he hid himself and watched to see if anyone would remove the huge rock. Some of the kirig's wealthiest merchants and courtiers came by and simply walked around it.

Physics Trick: Pour Water over Your Audience Introduction A great excuse threatening to pour water over your audience – but with a surprise Twist, thanks to physics.

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B. The "Tesla Coil" of the sUNWISE MICROWAVE OVEN EXPERIMENTS High Voltage in the Kitchen William J. Beaty U. Washington: Microwave Magma: a lava flow of liquid Pyrex A guy who repairs microwave ovens once told me that an oven burned a hole through a Pyrex measuring cup.

Turnitin provides instructors with the tools to prevent plagiarism, engage students in the writing process, and provide personalized feedback. Dear Twitpic Community - thank you for all the wonderful photos you have taken over the years. We have now placed Twitpic in an archived state. It is part of the natural physics of water and other fluids to always find their level and remain flat.

If disturbed in any way, motion ensues until the flat level is resumed. | Physics in the Field