The sonar of a stationary ship sends a signal with a frequency of hertz 6.66x103 down through water. The speed of the signal is 1.5x10 meters per second. The echo from the bottom is detected 5.3 seconds later. What is the depth of the water under the ship? (Round to the singles place, no decimal points or units.)​

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?