Water enters a 5-ft-wide, 1-ft-deep channel as shown in Fig.P4.66. Across the inlet the water velocity is 6 ft/s in the centerportion of the channel and 1 ft/s in the remainder of it. Fartherdownstream the water flows at a uniform 2 ft/s velocity across theentire channel. The fixed control volume ABCD coincides withthe system at time t = 0. Make a sketch to indicate (a) the systemat time t = 0.5 s and (b) the fluid that has entered and exited thecontrol volume in that time period.
Vicariance Events Large-scale speciation events caused by geological or climatic events Orogenic Events Mountain building events can affect vicariance events. Ex: the closing of the Panamian portal between the Pacific Ocean and the Caribbean was a vicariant event that impacted ocean currents. Ch. 42 Abundance of individuals in populations is influenced by Populations population density and population size. Population abundance Influenced by: 1) Adaptations in the species’ niche 2) The quality of an organisms’ habitat Survivorship curves Type 1: most offspring produced in a generation survive into adulthood. Mortality rates are low until the old ages are reached. Ex: elephants and human beings in developed countries Type 2: Mortality rate is constant throughout the years. Ex: eggs, young eagles, humans in undeveloped countries. Basically, they all have an equal chance of dying at any time. Type 3: Most of the offspring die before maturing but