How long would it take a sound wave from a car alarm to travel 1.0 km air if the air temperature were 0c?

At 0°C, the speed of sound in air is approximately 331 meters per second. To calculate the time it takes for a sound wave to travel 1.0 km (or 1,000 meters), you can use the formula time = distance/speed. Thus, time = 1,000 meters / 331 meters per second, which is about 3.02 seconds.