Air at 300 k is flowing through a horizontal tube of inner diameter 2 cm. the local flow velocity measured at a radius of 5 mm from the tube centerline is 0.9 m/s. (a) the rate of pressure drop in the flowing air. (b) the average linear velocity of the flow. (c) the shear stress exerted on the tube by the air. ectinely, 12 kg'm' and 1.85- 10' pars

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher