On a trip a motorist travels at 80 km/h for the first 200 km, and 60 km/h for the remainder of the trip. if the trip is 300 km in total, calculate the average speed for the whole trip.

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

The mini-refrigerator fire was most likely caused by what type of wiring?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above