Hydrogen probably cannot exist for a long time on Mars. As you suggest this is
because of the planet's fairly low gravity and escape velocity. It's easier for a
very light atom or molecule, such as hydrogen, to reach the planet's escape velocity, caused by collisions in the atmosphere.
Escape velocity is the speed you would have to go to escape gravity.
You don't. "Escape velocity" is a meaningless number. "Escape velocity" is the speed at which a CANNON SHELL must be fired in order to escape from the Earth's gravity well. With a powered rocket, you can "escape" from the Earth's gravity at ANY speed - as long as you have enough fuel.
An object would need to start at about 25 miles per second in order to escape Earth's gravity.
Thermal energy causes some of the molecules at the outer edge of the Earth's atmosphere have their velocity increased to the point where they can escape from the planets gravity. T;)
"Escape velocity" is a misnomer; there isn't any such thing. "Escape velocity" is the speed that it would take a projectile to escape completely from the Earth's gravity, IF IT WERE FIRED FROM THE SURFACE FROM A CANNON.The "escape velocity" from Earth is about 7 miles per second, or 25,000 miles per hour. But the Apollo spacecraft that went to the Moon didn't go anywhere near that speed. It didn't have to, because it was propelled by a rocket engine. With a big enough engine and enough fuel, you could "escape" from the Earth at 5 miles per hour, or less. It would be TERRIBLY wasteful of fuel, which is why we don't do it that way.
Escape velocity is the speed you would have to go to escape gravity.
The velocity of a any object to surpass the gravity of earth commonly known as escape velocity is 11.2Km/s.
To overcome gravity, you must reach "Escape Velocity" to overcome gravity and escape a planet's orbit.
You don't. "Escape velocity" is a meaningless number. "Escape velocity" is the speed at which a CANNON SHELL must be fired in order to escape from the Earth's gravity well. With a powered rocket, you can "escape" from the Earth's gravity at ANY speed - as long as you have enough fuel.
A rocket that doesn't reach "escape velocity" will be overcome by gravity and will be pulled back down to Earth. Also, rockets which go into orbit have not reached escape velocity. Escape velocity is what is needed to completely leave earth's gravity well.
Escape velocity is given by. √2gR or √2GM/R .therefore escape velocity is directly prop. to gravity of a planet or star or any other body. More is the gravity more is the escape velocity. The escape velocity of our earth is 11.2 km/s and that of moon is 2.31 km/s
Escape Velocity
The escape velocity is determined by the gravity of the planet which in turn is determined by the mass and size of the planet
Inside what? Oxygen is part of the atmosphere. The thermal velocity of its molecules are insufficient to escape earth's gravity (unlike hydrogen molecules which are fast enough).
It will eventually straighten out as it escapes gravity.
the rocket speed required to escape out of the earth's gravity is known as escape velocity which is numerically equal to 11.2 km per sec.
escape velocity if its leaving earths gravity