What led to galileo's discovery of a way to measure small amounts of time more accurately?

What is binding energy and separation energy

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping. the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?