A police car is approaching at a speed of 20.0 m/s with its siren emitting a frequency of 1.0 kHz. What frequency does a stationary observer detect? The speed of sound in this case is 330 m/s.

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.)

Asystematic approach to problem solving is called a (an)

It is really hard for me right know