Un camión se encuentra parado en un reten de carros hecho por la policía. El camión pita y lo hace con una frecuencia de 400 Hz. Cuál es la frecuencia del policía de
carreteras que percibe el sonido y quien camina con una velocidad de 10 m/s
alejándose del camión . Tenga en cuenta que la velocidad del sonido es de 340 m/s.

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?