What has increased the concentration of atmospheric carbon dioxide (CO2)?

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?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

What is a subatomic particle with a negative charge and very little mass?