Here are the densities at STP:
Air (ρair) = 1.292 kg/m3.
Helium (ρHe) = 0.178 kg/m3
so you'd need to compress Helium about 7x to achieve the same density as air.
3:1
is it right 92
Only batman knows
Hydrogen, helium, and a small amount of lithium. If the BB is an accurate description of the early existence our Universe, then the ratio of hydrogen to helium to deuterium would be a certain value. The actual ratio matches the prediction of the BB quite well.
A 1:1 ratio is equal to 0 PSI. 14.7 PSI is equal to a 2:1 ratio. Just multiply your ratio by 14.7 to get PSI, or divide PSI by 14.7 to get ratio. This is only in a perfect cylinder where valves close exactly as the piston reaches the bottom and stays closed the whole way, and if no air bleeds out from the valves, or between the piston and cylinder wall. Not to mention the difference between if it's hot or cold. Plus, according to the math problem, if you had a compression ratio of 1:1, you would be pushing 14.7 psi. So there isn't any REAL way of telling an engines compression ratio without getting the specs for everything.
The lowest compression ratio of a compression-ignition engine that allows a specific fuel to be ignited by compression ignition.
23:1 compression ratio
Compression ratio simply means the difference in size of the original vs compressed unit. Compression ratio is a commonly used term for internal combustion engine piston/cylinder compression and file compression. Ratios differ depending on the type of engine or the type of file being compressed. In file compression, 7zip has the highest compression ratio.
The compression ratio for NASCAR engines is limited to 12.0:1.
The compression ratio for the 1995 Mustang is: 9.0:1
compression ratio=uncompressed image size/compressed size
compression ratio = compressed size / uncompressed size the ratio should be between 1 and 0 (multiply with 100 to get the ratio in percent) a ratio greater than 1 means, the compressed size is actually greater than the uncompressed size a ratio just below 1 means bad compression the lower the ratio, the better the compression
8.4:1 is the compression ratio for 04-07 STi's.
"600 psi" is not a compression ratio; it's a pressure. For a RATIO, you need to compare TWO different numbers.
The compression ratio is simply the ratio of the absolute stage discharge pressure to the absolute stage suction pressure.
No, because there is always some leakage.
Nothing. Compression ratio is usually displayed as 9:1, or 9 to 1.