Asound-producing object is moving away from an observer. the sound the observer hears will have a frequency that actually being produced by the object.

the same as

higher than

lower than

need !

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Astudent pushes a 40-n block across the floor for a distance of 10 m. how much work was applied to move the block? a. 4 j b. 40 j c. 400 j d. 4000 j

Which best offense of relationship between speed and velocity speed is velocity what displacement velocity and speed with displacement spee is based on a specific direction velocity isis based on displacement