1200kg car speeds up from 2 m/s to 6 m/s. How many times greater is the car's kinetic energy at the higher speed compared to the kinetic energy at the slower speed?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)