Stew Dious studies for his exam for such a long time that he falls asleep standing up. Stew pushes straight down on the
floor with 150 pounds of force due to gravity and he does not move, as he is sound asleep. Check all of the following
statements that are true.
A The floor pushes straight up and to the right on Stew's feet.
B The floor pushes straight up on Stew's feet.
The floor force pushes in the same direction as Stew's feet.
D The floor pushes down on Stew's feet.
E The total force exerted by the floor on Stew's feet is 150 pounds.
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Ответ:
Explanation:
Radiata
In the early part of the 19th century, Echinodermata was recognized as a distinct group of animals and was occasionally associated with the cnidarians and selected other phyla in a division of the animal kingdom known as the Radiata; the concept of a superphylum called Radiata is no longer valid.