Cosmic background radiation is electromagnetic radiation from the sky with no discernible source. The origin of this radiation depends on the region of the spectrum that is observed.
The average kinetic energy of a gas particle is directly proportional to the temperature. An increase in temperature increases the speed in which the gas molecules move. All gases at a given temperature have the same average kinetic energy. Lighter gas molecules move faster than heavier molecules.
The volcanic ashes from the volcano
After 20 s, the motorcycle attains a speed of

and it continues at this speed for the next 40 s. So at 45 s, its speed is 80 m/s.