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Thus, when a bullet is shot against a target, before it strikes it has what we call mechanical energy, and we measure that in foot-pounds; after it has struck the target, the transformation is into heat, and this has its mechanical equivalent, but is not called mechanical energy, nor are the motions which embody it similar. The mechanical ideas in these phenomena are easy to grasp.
When Faure, having in 1880 improved upon the storage battery of Planté, sent his four-cell battery from Paris to Glasgow, carrying in it stored electrical energy, it was found to contain power equal to close upon a million foot-pounds, which is about the work done by a horse-power during the space of half an hour. This battery weighed very nearly 75 lb.
The general over-contraction may be small when estimated in foot-pounds, but its importance is immense on account of its effects on the over-contracted person's spiritual life. This follows as a necessary consequence from the theory of our emotions to which I made reference at the beginning of this article.
As 1 horse power is a little less than 2 million foot-pounds per hour, only one-twelfth, or a little more than 8 per cent. of the total heat is converted; so that whether we look at the total quantity of heat which we show unconverted, or the total heat converted, we find that each supplements and corroborates the other.
Each of these has several varieties, and changes may be rung on combinations of them, as when mechanical and magnetic conditions interact. In the first case, ordinary mechanical or translational energy is spent as friction, an amount measurable in foot-pounds, and the factors we know, a pressure into a distance.
The general over-contraction may be small when estimated in foot-pounds, but its importance is immense on account of its effects on the over-contracted person's spiritual life. This follows as a necessary consequence from the theory of our emotions to which I made reference at the beginning of this article.
We are asked to consider gravitative energy, heat energy, mechanical energy, chemical energy, and electrical energy. When we inquire what is meant by energy, we are informed that it means ability to do work, and that work is measurable as a pressure into a distance, and is specified as foot-pounds.
A very large tiger may weigh 450 lbs.; a '577 bullet of 650 grains, propelled by 6 drams of powder, has a striking energy of 3520 foot-pounds.
"It is stated that 'the internal resistance of the armature' of this machine 'is only 1/2 ohm. On this fact and the disproportion between this resistance and that of the external circuit, the theory of the alleged efficiency of the machine is stated to be based, for we are informed that, 'while this generator in general principle is the same as in the best well-known forms, still there is an all-important difference, which is that it will convert and deliver for useful work nearly double the number of foot-pounds that any other machine will under like conditions." The writer of this critical letter then proceeds to quote Mr.
But it cannot be grasped in an impatient moment it must be gathered with labour. I have threshed out in my hand three ears of the ripe wheat: how many foot-pounds of human energy do these few light grains represent? The roof of the Crystal Palace yonder gleams and sparkles this afternoon as if it really were crystal under the bright rays.
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