Atrain at rest emits a sound at a frequency of 1045 hz. an observer in a car travels away from the sound source at a speed of 22.4 m/s. what is the frequency heard by the observer? assume the speed of sound in air to be 344 m/s. answer in units of hz

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.