The fastest speed ever measured for a tennis ball served by a player was 263 km/h. the distance of the tennis court from one end to the other is 23.8 m. (a) how long does the tennis ball take to go from one end of the court to the other? (b) suppose that the time the tennis ball takes to go from one end of the court to the other is 0.6 s. what is the speed of the tennis ball?

Why should seat belts not be mandatory quick plz

In the first law of thermodynamics, triangle e=q-w, what does q stand for

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !