5. You have 6.0 hours to travel a distance of 140 km by bicycle. a. How long will it take you to travel the first half at an average speed of 21 km/h?

b. In the second half of the ride, you need to increase your average speed to make up for lost time. If you can maintain an average speed of 25 km/h, will you be able to reach your destination on time?

c. Show your calculations for the average speed you need to maintain in the second half of the bike ride to make up for lost time.

d. Draw a position-time graph for the bicycle trip. Show your position at 20-minute intervals.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

c)as speed changes, wavelength and frequency change.

everything changes!

the answer is b

explanation:

pretty sure it's false