The result would be, of course, a simple perpetual motion machine.

Perpetual motion machines of the second kind are thus impossible.

A perpetual motion machine of the first kind produces energy from nothing.

He spent his final years attempting to build a perpetual motion machine.

Perpetual motion machines only have one reservoir for the heat.

"Nature has given us the perpetual motion machine we call wind.

Today, the American tax system can be likened to a perpetual motion machine.

Same as thinking we can have a perpetual motion machine - pure fiction.

To think through if any perpetual motion machine will work, you need to pay attention to the energy requirements in every step of the cycle.

He had a perpetual motion machine which he believed would work.

Now, this is the software engineering equivalent of a perpetual motion machine.

"It's not a perpetual motion machine," he insisted this week.

Obviously, this is a reaction that requires energy: there are no perpetual motion machines.

Such a machine is called a "perpetual motion machine of the second kind".

Dircks had an interest in man's search for a perpetual motion machine.

It is thus impossible to create a perpetual motion machine by combining the two processes.

Toti worked at a pet project, building a perpetual motion machine.

More years were spent in what he described quite seriously as an attempt to invent a perpetual motion machine.

"Here we seem to be entering the realm of ghosts and perpetual motion machines again."

This is a gallery of some of the perpetual motion machine plans.

It's tempting to believe that any website can become a perpetual motion machine of profit.

Otherwise, it would be possible to build a perpetual motion machine that passed a current in a circle around the circuit.

The device was quickly attributed the term "perpetual motion machine" by several media outlets.

Perpetual motion machines have been classified into different types.

But it is also relevant to individual investors, who have grown accustomed to thinking of the market as a perpetual motion machine.