The development of cars has pros and cons. the car has allowed for better transportation, but it is also responsible for a great deal of pollution. which activity can reduce pollution through the use of new technology? a. building cars that run on nonpolluting fuels b. encouraging people to ride the bus c. building fewer cars d. encouraging people to walk more

Tsunamis are fast-moving waves often generated by underwater earthquakes. in the deep ocean their amplitude is barely noticeable, but upon reaching shore they can rise to an astonishing height of a six-story building. one tsunami generated off the aleutian islands in alaska, had a wavelength of 897km and traveled a distance of 3280km in 4.18h. (a) what was the speed (in m/s) of the wave? find the waves (b) frequency and (c) period.