Physics Review: Thermodynamics #48 Efficiency of an Automobile

[@photon434]

In terms of efficiency, combustion engines are only a step above steam engines. Are you going to follow up with an electric car comparison?

[@overtoke]

here's some of what we already know "In a gas car, only 16 to 25 percent of the fuel energy actually goes into the wheels - the rest is lost mostly in the form of heat and friction. In an electric car, on the other hand, 87 to 91 percent of the energy in the battery goes to power its wheels."

[@richardhoare9963]

@overtoke what percentage of the Energy used in generating the electricity at the power station ends up in the wheels of an EV? There are efficiency costs in drilling, refining, and transporting petrol or diesel in order to refuel an internal combustion engine. What are the equivalent costs in producing and distributing electricity?

[@MichelvanBiezen]

Indeed for electricity produced in power plants we have to take into account the efficiency of them.

[@jakubkusmierczak695]

Mr. Professor have You ever wondered that the engine capacity of 1,5L (water bottle) moves 1500 kg mass of a car? Is it not amazing?

[@MichelvanBiezen]

The invention of the gasoline engine is indeed amazing.

[@jakubkusmierczak695]

@@MichelvanBiezenthank You. Mr. Professor steam engine has the highest torque from all engines, why is that?

[@Znxjsjnsdn]

Professor does the vernal equinox also make a circle like the North Pole? If that where true the tropical year would be correct.

[@MichelvanBiezen]

I wouldn't call it a circle, but the equinoxes are affected by the precession in the same way.

[@Znxjsjnsdn]

Professor does the tropical vernal equinox move? also does the sidereal zodiac stay still? So the tropical vernal equinox is moving with precession around the sidereals ecliptic?

[@Znxjsjnsdn]

Professor if it is true that in 13k years the summer will be winter is the tropical year like totally wrong. Why aren’t we using sidereal? The vernal equinox in the tropical year wouldn’t even be the real vernal equinox. The Vedic year would be the real vernal equinox

[@MichelvanBiezen]

If the calendar was not adjusted we would eventually have winter in July in the Northern Hemisphere.