Which is the best example of the heat through radiation

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j