Which of the following are true waves, as the word is defined in physics?
A) a water wave coming into a beach, after it has broken
B) water rushing downstream
C) Both of the above.
D) a sports wave called the wave at a sports arena
E) None of the above.
Question 2
A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?
A) 92 km/h B) 90 km/h C) 85 km/h D) 88 km/h