Un tambor cilíndrico vacío tiene una masa de 20 kg y se le agregan 100 Kg de arena. Si el diámetro de la base del tambor mide 80 cm. ¿Cuánta presión ejerce sobre el suelo? 1176 N

2352 Pa

120 Kg

588 Pa

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

answer: 31, 5556. 952 seconds

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.