Si un operador debe elevar una carga de 100 Kg. ¿Con cuál de las siguientes máquinas simples va a realizar menor esfuerzo? Justifique analíticamente. a) Plano inclinado de 30° sin rozamiento. b) Palanca de primer género con un brazo de potencia de 1 mts y brazo de resistencia de 25 cm. C) Aparejo factorial con 3 poleas móviles. d) Torno con una manivela de 50 cm y el diámetro del tambor de 15 cm.

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.