Quotes About Density

Obviously, the higher the density of an energy resource, the lower are its transportation (as well as storage) costs, and this means that its production can take place farther away from the centers of demand.

during the past 30 years the maximum energy density of batteries has roughly tripled, and even if we were to triple that again densities would still be well below 3,000 Wh/kg in 2050—falling far short of taking a wide-body plane from New York to Tokyo or from Paris to Singapore, something we have been doing daily for decades with kerosene-fueled Boeings and Airbuses.

More efficient photovoltaic cells would be most welcome because of their relatively high power densities: efficiencies close to twenty percent would translate to electricity generation rates between 20–40 W/m2, two orders of magnitude better than biomass conversion, and one better than most hydro and wind projects.

energy densities (energy stored per unit of mass or volume, critical for energy storage and portability)

As a rule of thumb, the hermaphrodite lifestyle works well if the prospects of finding a mate are slim, for example in low-density or immobile populations (explaining why many plants are hermaphrodites), while separate sexes develop in species with higher population densities or greater mobility.

my practice is always to stage incommensurate approaches to a problem/object in order to attend to its instability, density, and openness.

On the average, one thousand people settle on or near the San Andreas Fault each day. Nowhere in the United States is the density of population greater than in San Francisco and its environs. Nowhere is disregard of the danger more apparent.

I think it's going to be a very important, unique data set in terms of measuring the behavior of your lower body in space and trying to figure out what we can do to preserve bone and muscle density.

The main problem with biofuels - the land required - stems from their low power density.

Your head is a stereo input. The density and cartilage of your ears embed certain extra characteristics into stereo sound sources. Your brain decodes that and gives you sound plus conscious directions.

I've read short stories that are as dense as a 19th century novel and novels that really are short stories filled with a lot of helium.

Ample, easy parking is the hallmark of the dispersed city. It is also a killer of street life. A cruise through Los Angeles illustrates the dynamic. The city's downtown has been said to contain more parking spaces per acre than any other place on earth, and its streets are some of the most desolate.

The two most abundant things in the universe are Hydrogren and stupidity.

Waters thick. Bloods thick. I feel thick. You feel thick. God feels thick. So what's the matter?

Recent measurements reveal a universe consisting mostly of the unknown. Fully 70 percent of the matter density appears to be in the form of dark energy. Twenty-six percent is dark matter. Only 4 percent is ordinary matter. So less than 1 part in 20 is made out of matter we have observed experimentally or described in the standard model of particle physics. Of the other 96 percent, apart from the properties just mentioned, we know absolutely nothing.

A singularity is a point or region in spacetime at which some physical quantity such as the density of mass or energy, the temperature, or the strength of the gravitational field, becomes infinite. Whenever they happen, they pose serious difficulties for physics because they signal a breakdown in the description of the world in mathematical terms.

Similarly, a few thousand workers dribbled in among tens or hundreds of thousands of residents make no appreciable balance either in sum or at any particular spot of any significance

This is a common assumption: that human beings are charming in small numbers and noxious in large numbers.

No good for cities or for their design, planning, economics or people, can come of the emotional assumption that dense city populations are, per se, undesirable.

The task is to promote the city life of city people, housed, let us hope, in concentrations both dense enough and diverse enough to offer them a decent chance at developing city life.

Two-thirds of all growth takes place in cities because, by simple fact of population density, our urban spaces are perfect innovation labs. The modern metropolis is jam-packed. People are living atop one another; their ideas are as well.

I know that New York City remains the highest density urban area in the country and by far dedicates more of its own funds to fighting terrorism than any other municipality.

Carpooling is important for urban density, air pollution and other reasons, but carpooling is not the kind of thing that actually changes the energy equation.

We need to reform our land use policies to build more housing in urban centers and near transit.