While you are standing still on the sidewalk, you are passed by an ambulance traveling at 20.00 m/s. The ambulance’s siren produces a tone at a frequency of 950.0 Hz. The speed of sound in air is 343.0 m/s. What frequency do you hear as the ambulance approaches you?
What frequency do you hear as the ambulance moves away from you?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2