What are two most important processes in the cycling of oxygen in and out of the atmosphere?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest