Burning a gallon of gas, FYI (F150, brakes, engine, diesel)

[HappyRider]

Originally Posted by Blind Cleric

In case you weren't aware, it consumes approximately 20 pounds of oxygen and produces about 17 pounds of CO2. Yeah, I'd rather be walking too.

A gallon of gas weighing a mere 6 pounds also moves a family of 5 with full luggage for 40 miles all for 3 bucks. You got something better?

[kokonutty]

Okay. Now, how much more oxygen will a human consume by walking, or running, or bicycling the same 25 miles that the gallon of gas would take them in a car than they would remaining at rest? How much additional carbon dioxide will they consume in traveling that distance than if they stayed home on the sofa?

If they take a friend in the car or three friends we can maintain the same oxygen usage for the vehicle but must double or quadruple the calculations for people getting there under their own power, right?

Is there a method to move humans from one place to another without utilizing oxygen and creating carbon dioxide? Perhaps we are all better off just staying on the couch.

[cebuan]

Originally Posted by Blind Cleric

In case you weren't aware, it consumes approximately 20 pounds of oxygen and produces about 17 pounds of CO2. Yeah, I'd rather be walking too.

That's less than a pound a mile. Threee passengers use a pound in 1.5 miles, How much would they use walking 4 or 5 person- miles?

[thecoalman]

Originally Posted by theedgeoflight

Allow me to display my ignorance here. So a gas actually has a weight? 20 lbs of O2 must be a helluva lot of gas.

Not in the typical sense, it's based on mass. If you weigh a empty cylinder and then compress a gas into into it will weigh more with the compressed gas.

[Gungnir]

Originally Posted by thecoalman

Not in the typical sense, it's based on mass. If you weigh a empty cylinder and then compress a gas into into it will weigh more with the compressed gas.

Yes in the typical sense.

Weight is just the scalar force acting on a mass in a gravitational field.

What do you think makes air pressure? It's the weight of air, it's density changes according to humidity and temperature which affects it's weight (density being mass per unit volume) thus it's pressure.

ETA: Clearer example. Suppose you take 1lb of ice, you melt it to water, you have 1lb of water, you boil it containing the steam, you have 1lb of steam. Air is just elements and compounds whose boiling points are below naturally experienced on Earth.

[EckyX]

How far will a gallon of gas take you? For me, it's around 100 miles.

[burdell]

Originally Posted by rbohm

all gases have weight to them when contained. in fact that is how gases were first measured to determine the atomic weight of a particular gas.

Their mass (or weight when in the presence of gravity) doesn't go away when uncontained, their density just gets lower.

[thecoalman]

Originally Posted by Gungnir

Yes in the typical sense.

To clarify what I meant was the typical perception of weight, e.g. most people would not understand helium has weight.

[Gungnir]

Originally Posted by thecoalman

To clarify what I meant was the typical perception of weight, e.g. most people would not understand helium has weight.

ROFL.

Thanks for the clarification. I see what you're getting at, it's the old gotcha of which is heavier 1lb of lead or 1lb of feathers kinda thing.

[cebuan]

Any substance can be measured in pounds, which is comparative expression of mass.