While on an 8.0 h trip, a car traveled for 3.5 h at an average speed of 90km/h before stopping for 1.0 h. The car then traveled for 2.0 h at an average speed for 80.0 km/h. For the last 1.5 h the car traveled at an average speed of only 70.0 km/h. What was the average speed of the car the entire 8.0 h trip ?

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."