Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ()na2hpo4 → ()na4p2o7 + ()h2o

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?