In a boat race, dan drove his motorboat over the 1000-meter course from start to finish in 40 seconds. what was dan's average speed during the race ?

The answer is 
1) 1000m/40sec = 25m/sec 

2) 16km/0.25hr = 64km/hr 

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

Iwas going to ask that quesytion  sorry dude i dont  know : (    : /