Steel is dense, which means that, for a given volume, it can hang on to more thermal energy than aluminum can. On the other hand, aluminum is highly conductive, which means that it can transfer heat from one place to another very rapidly.
Tri-ply pans try to split this difference by sandwiching a layer of aluminum in between two layers of steel. They heat evenly and store plenty of energy. Tri-ply pans are also more sturdily constructed than disk-bottom pans, which have aluminum disks attached only to their bottoms.
And Man created the plastic bag and the tin and aluminum can and the cellophane wrapper and the paper plate, and this was good because Man could then take his automobile and buy all his food in one place and He could save that which was good to eat in the refrigerator and throw away that which had no further use. And soon the earth was covered with plastic bags and aluminum cans and paper plates and disposable bottles and there was nowhere to sit down or walk, and Man shook his head and cried: "Look at this Godawful mess.
I watch people throw aluminum cans in the trash, and I think of all the stories I've heard about the over-mining of aluminum, the erosion that happens, and the trees that fall down.
The road to energy efficiency is, in theory, a sustainability sweepstake. More efficiency means that less fuel is required to generate a given amount of energy, which in turn means lower costs for the provider and cheaper prices for the customers.
Tariffs that save jobs in the steel industry mean higher steel prices, which in turn means fewer sales of American steel products around the world and losses of far more jobs than are saved.
People are always trading their excess for somebody else's excess. One country has a lot of aluminum so they trade aluminum for sugar. It's the law of supply and demand.
Never use an aluminum pot, pan, or utensil when cooking tomatoes - or any other soft metal items for that matter. The acidity in the tomato doesn't do well with them; they create a chemical reaction that can turn cooked tomatoes bitter and fade the color, and the food will absorb some of the aluminum!
I started hearing things about aluminum in deodorant and other things like that. And it be so hard when you try to go to the store and find deodorant and it might not have aluminum, ammonium, but it might have all these other things. And it's like, how do I know what's good and what's not?
Aluminum is the most common metal in the earth's crust, almost twice as abundant as iron. And one common class of aluminum minerals, collectively called alum, has been in use since at least Greek and Roman times.
And the camera position, the organization, looking for repeating forms, shapes, trying to set up a visual rhythm seemed to come very natural. All of a sudden I was in a forest of aluminum and steel rather than a forest that we might think of in a traditional sense.
We bombarded aluminum with alpha rays … then after a certain period of irradiation, we removed the source of alpha rays. We now observed that the sheet of aluminum continued to emit positive electrons over a period of several minutes.
The main peculiarity which distinguishes man from other animals is the means of his support - the power which he possesses of very greatly increasing these means.
The main peculiarity which distinguishes man from other animals is the means of his support-the power which he possesses of very greatly increasing these means.
U.S. industries from steel-making to plastics synthesis are among the world's most energy-efficient; American agriculture is highly productive, as are America's railroads. But for decades, Americans themselves have been living beyond their means, wasting energy in their houses and cars and amassing energy-intensive throwaway products on credit.
Electrons are the carriers for electricity, but they are also carriers for thermal energy. This means thermal conductivity is increased when the carrier density is increased.
Man is a means and not an end, and he is a means to economic or political ends which are not really ends in themselves but means to other ends which in their turn are means and so ad infinitum.