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If a big nut or bolt weighing 50 grams about 1.

the penny drops

To get an idea of the damage it can do, let's take a look at a bullet. A bullet might weigh 5 to 10 grams, and it leaves the barrel of a gun at anywhere from to 2, miles per hour, depending on the type of gun, the type of bullet and the amount of powder behind the bullet.

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A caliber bullet weighs about 9 grams. Let's assume it leaves the gun at 1, miles per hour. That gives it a muzzle energy of about foot-pounds 1 foot-pound is the amount of energy needed to raise 1 pound 1 foot in the air.

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Three-hundred foot-pounds of energy is clearly enough to kill someone. Even a third of that is enough to kill someone. A 1-gram penny falling from the Empire State Building might reach miles per hour. My kids love collecting them. After my OP, I found the following website which lists machines in US and Internationally, several listed in Niagara Falls but some info is a couple years old.

the penny drops

I am going to start to look for the Canadian ones to see what they are doing. As my son has a collection of them. There is one nearby that I can check it might take a week or so to get there. Yes it is officially "illegal" to deface a Canadian coin, but not all of the Canadian ones do have the blank in them.

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  • The meaning and origin of the expression: The penny drops?

They are not as popular in Canada as they are in the US. I believe there is also an ipad app with locations.

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Off topic but i used to place pennies on railroad tracks and let the train flatted them. Could never find all the pennies after the train went by, the pennies would be flatted so thin they be the size of a quarter. All of your saved places can be found here in My Trips. Log in to get trip updates and message other travelers. Log in Join Recently viewed Bookings Inbox.

Browse forums All Browse by destination. What are the most popular tours in Niagara Falls? Niagara Falls in One Day: Niagara Falls Day Tour from Toronto.

The penny dropped [into the weighing scales], the needle started around the figures, and stopped this time on Home Search Phrase Dictionary The penny drops. Browse phrases beginning with:.