According to Amedeo Avogadro’s hypothesis 1 L of hydrogen gas, 1 L of oxygen gas, and 1 L of helium gas that are all at the same temperature and pressure should have whitch of the following?

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Explain what happens at the saturation point when adding salt to water at room temperature.