Through which gas in the table will sound waves travel faster than they would travel through ammonia?
Alr (dry)
Ammonla
Methane
Nitrous
oxide
Argon
346
415
450
263
323
Speed of
sound
(m/s)
A. Air
B. Methane
C. Argon
O D. Nitrous oxide

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.

How do we measure or think of speed in the united states?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.