1. on which date does the antarctic circle have 24 hours of daylight? a. june 21
b. march 21
c. september 21
d. december 21

2. when energy is transferred to air, what happens to the particles of air? a. they move slower.
b. they move faster.
c. they cool down.
d. none of the above

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?