During an experiment of ecology, and the aquarium full of water is placed on a scale. The scale reads 195N.?
During an experiment of ecology, and aquarium full of water is placed on a scale. The scale reads 195N. A.) A rock weighing 8N is added to the aquarium. If the rock sinks to the bottom of the aquarium, what the scale will read? B.) The rock is removed from the aquarium and the amount of water is adjusted until the scale reads 195N again. A small fish weight 2N is added to the aquarium. What is the reading of the scale, while the fish is swimming in the aquarium?
a) suppose that a quantity of water equal to the volume of the rock is pushed out (and far from the scale). Therefore, we can not know the weight of all that now in the scale without the volume of the rock. b) The fish has a neutral buoyancy, so that the volume of expelled water also weighs 2N. So you can still read the scale at 195 N
Ecology of the Pacific 2007 – Monterey, California
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